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UZBEKISTAN IRRIGATION SYSTEMS AND THEIR MANAGEMENT POTENTIAL FOR FISHERIES IN REGIONAL CONTEXT

by
P. Umarov
11 Kazaksu-4, Tashkent, 700187, Uzbekistan

Abstract

Irrigation in Uzbekistan has been practised for thousands of years, but the large-scale infrastructure was constructed only during the Soviet period in response to the growing demand for cotton. Eventually cotton production used more than 90 percent of total water resources available in the country.

Since independence in 1990, Uzbekistan, as the major water user in Central Asia, has found itself in a difficult situation as a result of declining water management and growing water deficit, as well as lack of funds for further irrigation development. Water management activities have lately focused on operation of old irrigation systems and negotiating transboundary water problems. Fisheries, introduced in the region several decades ago in order to compensate for the loss of the Aral Sea fish catch, use irrigation and drainage systems. Under the favourable climatic conditions of Uzbekistan these waterbodies have a high potential for fish production.

However, constraints arising from the existing problems with water management of irrigation systems as well as those caused by other uses of water in Uzbekistan negatively affect fish production. Over the last ten years the fish production from waterbodies of irrigation systems decreased threefold. All fisheries are now privatized, but the privatization has resulted in decline of the formerly well developed fisheries research and management structures. Coordination among fisheries institutions responsible for maintaining sustainable fish yields in a great diversity of waterbodies serving and arising from irrigated agriculture has been disrupted. Linkages between the irrigation and fishery institutions have been lost, and there is lack of new initiatives and research projects facilitating and promoting the use of irrigation systems for fish production.

There is an urgent need for improving intersectoral cooperation in integrated water management, as well as a need for pilot research projects which would test the best fish enhancement practices for Central Asia. While the use of water for irrigated agriculture is still government priority, and the proposed new reforms in agriculture and water management, when implemented, will create a favourable environment for fish production, Uzbekistan needs international support, including funding. Further assistance is needed to establish a regional information network for exchanging information on the best possible use of irrigation systems for fish production. This also requires the international assistance of specialized fisheries organizations and institutions, such as FAO, NACA, etc. Introducing the best existing practices of fish production in irrigation and drainage waterbodies, selected from global experience, is of high importance for improving food security in the Region. While at present no regional network exists to deal specifically with the use of irrigation systems for fish production in arid countries, there is a potential for cooperation in the use of irrigation systems for fish production at the regional level. It is believed that the Interstate Commission for Water Coordination (ICWC), based in Tashkent, Uzbekistan, is a body capable of taking up this function.

1. Status of the use of irrigation systems for fish production in Uzbekistan

1.1 Status of irrigation development

Water is one of the major factors on which life and development in Central Asia depend. Irrigation was one of the main uses of water in the region from time immemorial, its origins dating back to the seventh millennium B.C. By the beginning of the twentieth century there were 2.5-3.5 million ha of irrigated lands in the Region, supported by an extensive irrigation network. When Uzbekistan was part of the Soviet Union water resources in Uzbekistan were subject to large-scale engineering modification, as demanded by the growing irrigated agriculture, basically for cotton production.

Water resources in Uzbekistan are part of the water resources of the Aral Sea basin (Map 1). This basin includes two major rivers of Central Asia: the Amu-Darya and the Syr-Darya, which are the main sources of surface flow. The portion of water originating directly from the territory of Uzbekistan is 6.3 percent in the Amu-Darya basin and 16.5 percent in the Syr-Darya basin, which represents 9.6 percent of their total flow (Anon., 1997) (Table 1). The water is stored in numerous reservoirs (Table 2) from where it is distributed on demand.

Table 1
River discharges in the Aral Sea basin (km3/year)

State

River basin

Aral Sea basin


Syr-Darya

Amu-Darya

km3

percent

Kazakhstan

2 624

-

2 626

2,1

Kyrgyzstan

27 605

1 604

29 209

25.1

Tajikistan

1 005

59 578

60 583

52.0

Turkmenistan

-

1 549

1 549

1.2

Uzbekistan

6 167

5 056

11 223

9.6

Afghanistan and Iran

-

11 593

11 593

10.0

Total Aral Sea basin

37 203

79 280

116 483

100

The use of water resources by different sectors of Uzbekistan is shown in Table 3. The main water use beneficiaries in Uzbekistan are irrigated agriculture, which uses 90 percent of the available water, drinking and rural water supply, industries and fisheries. These sectors also generate 28.2 km3 of return waters (Anon., 2000). Intensive development of irrigation and drainage in the Aral Sea basin has had two major impacts on water quantity and quality in the rivers: a major freshwater uptake for irrigation, and generation of polluted return water of elevated salinity.

More then 50 percent of the total irrigated area in Central Asia (4.3 million ha) is located in Uzbekistan. While the area under irrigation during the 10 years of independence remained the same there were some changes in the crop pattern. Cotton still remains the priority crop; however, its share in irrigated agriculture has decreased from 50 to 40 percent. The share of cereals (wheat, rice, maize etc.) has increased from 13 to 30 percent. The share of fodder crops has remained the same at 20 percent of the total (Anon., 2001).

Map 1
Location of the Aral Sea basin

The irrigation infrastructure of Uzbekistan comprises an interconnected irrigation system of canals and drainage collectors, with freshwater and drainage (return) water flows. In Uzbekistan there are 28 000 km of main and inter-farm irrigation canals and 168 000 km of in-farm irrigation canals. The total length of main and inter-farm collectors is more than 30 000 km and there are 107 000 km of in-farm collectors (Anon., 2000) (Table 4).

Table 2
Reservoirs in the Aral Sea basin (SIC ICWC data base) (million m3 = Mm3)

Name

In
exploitation
since

Total
capacity

Dead
capacity

Source

Mm3

Mm3

Amu-Darya River basin

Uzbekistan

Tuyamuyun

1980

7 800

2 550

Amu-Darya

Tudakul

1986

1 200

50

Andijan Great canal

Òalimazhan

1978

1 525

125

Karshi main canal

South Surhan

1962

800

210

Surhandarya

Tupolang

1985

500

30

Tupolang

Shurkul

1978

170

17

Zerafshan

Kuya- Mazar

1957

320

80

Andizhan Great canal

Akdarya

1989

130

20

Akdarya

Kattakurgan

1941

840

24

Zerafshan

Karaultube

1984

53

3

Zerafshan

Kamashi

1957

29.5

5.7

Yakkabagdarya

Kattasai

1961

55

15

Kattasai

Pachkamar

1967

260

17

Guzadarya

Dehkanabad

1983

27.2

3

Kychyk-Uradarya

Chimkurgan

1959

425

0

Kashkadarya

Gissarak

1982

170

15

Àksu

Uchkyzyl

1959

160

80

Zang canal


Total

14 464.7

3 244.7


Turkmenistan

Zeid

1963

2 200

200

Garagum canal

Hauzhan

1962

875

25

Garagum canal

Western

1962

48

10

Garagum canal

Kopetdag

1985

220

25

Garagum canal

Ioloten

1910

73.2

1.5

Murgap

Kolhoz-Bent

1941

54.6

4.6

Murgap

Kaushutbentå

1895

38.2

4.5

Murgap (lower and middle)

Sary-Yazin

1950

263

15

Murgap

Tedzhen II

1960

183.5

3.5

Tedzhen

Tedzhen I

1950

150

7.4

Tedzhen

Hor-Hor

1959

21.5

0.9

Tedzhen

Mamed-kul

1964

20.5

2.5

Àtrek

Òàshkeprin

1939

166

18.3

Murgap, Êushka


Total

4 313.5

3 182


Tajikistan

Muminobod

1959

30.1

0.9

Obisurh

Selbur

1961

26

0.6

Kyzylsu

Sangtuda

1980

270

0

Vakhsh

Golovnaya GES

1963

21.6

11

Vakhsh

Baipaza

1978

97

13.5

Vakhsh

Nurek

1970

10 500

5 964

Vakhsh


Total

10 944.7

5 990


Syr-Darya River basin

Tajikistan

Kairakkum

1956

3 413.5

894

Syr-Darya

Kattasai

1961

55

21.4

Kattasai


Total

3 468.5

915.4


Kyrgyzstan

Toktogul

1974

19 500

5 500

Naryn

Uchkurgan

1901

52.5

31.6

Naryn

Kurpsai

1983

370

20

Naryn

Kurgantepa

1978

33.3

5.5

Shahimardan

Naiman

1971

39.5

1.5

Abshirsai, Kyrgyzatan

Papan

1981

260

10

Akbura


Total

20 255.3

5 568.6


Uzbekistan

Dzhizak

1968

100

4

Sanzar

Zaamin

1979

51

21

Zaaminsu

Charvak

1966

2 000

420

Chirchik

Tuyabuguz

1959

250

26

Ahangaran

Ahangaran

1971

260

30

Ahangaran

Farhad

1947

350

330

Syr-Darya

Kassansai

1942

165

10

Kassansai

Karkidon

1963

218.4

4.4

Kuvasai and South Fergana canal

Andijan

1978

1 900

150

Karadarya


Total

5 294.4

995.4


Kazakhstan

Bugun’

1965

350

10

Bugun’

Chardara

1966

5 700

1 000

Syr-Darya


Total

6 050

1 010


Total for Aral Sea basin

64 791.1

18 042.3


Incl. Amu-Darya

29 722.9

9 552.9


Syr-Darya

35 068.2

8 489.4


Table 3
Water use in Uzbekistan (million m3) (SIC ICWC data base, Statistics Yearbooks 10-20)
(*at rayon = district boundaries)

Year

Source

Drinking
water
supply

Rural
water
supply

Industry

Fishery

Irrigation*

Other

Total

Basin

1960


200

250

500

500

13 930

0

15 380

Amu

280

250

700

200

13 970

0

15 400

Syr

480

500

1 200

700

27 900

0

30 780

Total

1965


220

350

600

500

19 800

0

21 470

Amu

300

350

900

300

17 980

0

19 830

Syr

520

700

1 700

800

37 780

0

41 500

Total

1970


250

480

1 100

130

23 550

0

25 510

Amu

450

500

1 400

300

19 900

0

22 550

Syr

700

980

2 500

430

43 450

0

48 060

Total

1975


300

900

2 260

300

25 600

100

29 460

Amu

500

1 050

2 600

700

19 850

250

24 950

Syr

800

1 950

4 860

1000

45 450

350

54 410

Total

1980


400

1 090

2 150

200

29 060

300

33 200

Amu

660

1 300

2 500

510

26 450

290

31 710

Syr

1 060

2 390

4 650

710

55 510

590

64 910

Total

1985


440

440

240

130

32 708

0

33 958

Amu

1 100

450

1 000

290

21 596

0

24 436

Syr

1540

890

1240

420

54 304

0

58 394

Total

1990


704

349

196

353

35 048

0

36 650

Amu

1 650

374

1102

727

23 108

0

26 961

Syr

2 354

723

1298

1080

58 156

0

63 611

Total

1995

Total:

630

520

250

280

30 030

0

31 710

Amu

Surface water

0

0

150

280

27 230

0

27 660


Ground water

630

520

100

0

1 000

0

2 250


Drainage re-use

0

0

0

0

1 800

0

1 800


1995

Total:

1 400

570

950

600

18 990

0

22 510

Syr

Surface water

0

0

300

600

15 490

0

16 390


Ground water

1 400

570

650

0

1 500

0

4 120


Drainage re-use

0

0

0

0

2 000

0

2 000


1995

Total:

2 030

1 090

1 200

880

49 020

0

54 220

Total

Surface water

0

0

450

880

42 720

0

44 050


Ground water

2 030

1 090

750

0

2 500

0

6 370


Drainage re-use

0

0

0

0

3 800

0

3 800


1999

Total:

1 428

993

527

435

34 830

0

38 213

Amu

Surface water

0

0

277

435

32 255

0

32 967


Ground water

1 428

993

250

0

557

0

3228


Drainage re-use

0

0

0

0

2 018

0

2 018


1999

Total:

1 205

396

817

372

21 830

0

24 620

Syr

Surface water

0

0

287

372

18 096

0

18755


Ground water

1 205

396

530

0

1 600

0

3 731


Drainage re-use

0

0

0

0

2134

0

2134


1999

Total:

2 633

1 389

1 344

807

56 660

0

62 833

Total

Surface water

0

0

564

807

50351

0

51 722


Ground water

2 633

1389

780

0

2 157

0

6 959


Drainage re-use

0

0

0

0

4 152

0

4 152


Table 4
Main collectors in the Amu-Darya and Syr-Darya river basins, discharge in 1999
(SIC ICWC database)

Main collectors

Average flow rate
m3/sec
(1999)

Salinity
g/L

Annual
discharge
million m3

Discharged into

KS-1

12.6

4

400

Aral Sea area

KS-3

5.3

4.1

168

Aral Sea area

KS-4

4.3

2.65

138

Aral Sea area

KKS

18.4

5.4

581

Sudoche lake

Beruny

10.1

3.9

321

Amu-Darya river

Ayazkala

12.4

4

392

Ayazkala lake

Ustyurt

6.6

4

209

Sudoche lake

Ozerny

73.1

4.1

2 308

Sichankul lake

Divankul

31.1

2.7

981

Sichankul lake

Parsankul

28.1

3

884

Amu-Darya river

Dengizkul

14.3

4.9

451

Dengizkul lake

Central Bukhara Canal

15.5

3.05

490

Solyonoe lake

Zalodno-Romiton

2.5

2.4

79

Solyonoe lake

Agitma

5.5

2.1

174

Agitmin lake

Severny

22.6

2.9

713

Korakir lake

Yuzhny

74.2

7.1

2 339

Sultandag lake

Central Golodnaya Steppe Canal

43.1

4.2

1 360

Arnasay depression

Shuruzak

12.7

2.8

400

Syr-Darya river

DGK

11.2

3.5

354

Kly collector

Ok-Bulok

3.9

3.9

122

Tuz kony lake

Pogranichny

1.8

4.5

58

Tuz kony lake

Kly

3.23

4.7

102

Arnasay depression

Achikkul

49.5

2.65

1 560

Syr-Darya river

Korakalpak

9.6

1.57

302

Syr-Darya river

Sari-Suv

65.8

1.5

2 074

Syr-Darya river

Urtukly

20.6

1.3

650

Syr-Darya river

Chilisay

11.2

1.27

350

Syr-Darya river

There has been practically no further irrigation development in Uzbekistan since independence. Management of water resources has focused on operation and maintenance of the existing systems. For instance, in 1994 the capital investment in irrigation development was 37 percent of that of 1990, and only 5 percent in 1999 (Scientific Information Centre of the Interstate Coordination Water Commission - SIC of ICWC). At the same time funds for the operation and maintenance of irrigation systems in 1999 decreased by 32 percent compared to their level in 1990. In 1999, the operating costs of water resources organizations of Uzbekistan were US$436.1 million, or US$103.8 per ha.

In the region, i.e. Central Asia, Uzbekistan is the largest water user with the least potential to generate water resources. There is therefore a great need to overcome water deficit and to solve the problems of transboundary water resources management. Old principles of water management which were applied to the whole region prior to independence, giving priority to irrigated agriculture, are not in accordance with the priority of water use as a basic source of power generation in the independent states located in the upper watershed area (Kyrgyzstan and Tajikistan). This leads to a conflict of interests between upstream and downstream states. To develop cooperation in the field of joint management, protection and use of water resources, the regional ICWC with its executive bodies, the Basin Water Organisations (BWO) Amu-Darya and Syr-Darya, and the Scientific Information Centre of ICWC were established in 1992 by the initiative of the ministers of five Central Asian states. The present structure of water resources management in the region consists of two levels, i.e. interstate and national.

The present national institutional setting responsible for irrigation development and management in Uzbekistan consists of a number of departments financed by the government.

The main constraints to irrigation development in Uzbekistan are:

1.2 Status of the use of irrigation systems for fish production

Until 1960 fisheries of Uzbekistan were concentrated predominantly in the Aral Sea area. In 1958 fish catches reached a maximum of 50 000 tonnes (Fig. 1). As a result of the Aral Sea desiccation and increased salinity to 14 g/litre (the salinity in 1983), there has been no fishing in the Aral Sea since 1983. Fisheries have moved to delta lakes and Lake Sarykamysh formed from drainage waters. But Sarykamysh also eventually lost its fishery value due to an increase in salinity which by now reached in some areas 20 g/litre. Today’s fish yields in lakes and reservoirs in the Aral Sea area range from 1.2 to 209 kg/ha (Anon., 1990, 1998, 2001a) (Table 5).

Fig. 1
Fisheries in the Aral Sea zone (Zholdasova et al., 1996)

Table 5
Fish production in lakes and reservoirs owned by the State Joint Stock Company Karakalpak Fisheries (Anon., 2001a)

Lake or reservoir

Area
(ha)

Depth
(m)

Width
(m)

Production
kg/ha

Reservoir location

Name of fishing
enterprise

Domalak, Janly - close to Domalak lakes

2 000

1.2 -1.5

3.5 - 4.0

80

Muinak region right bank of Amu-Darya

Muinak fish processing factory

Karateren lake - located at Damalike

1 000

1.2 - 1.5

3.5 - 4.0

40

Muinak region right bank of Amu-Darya

Kazakh-Darya fish processing factory

Shege

3 000

1.3 - 1.8

3.5

66

Muinak region, northwestern part of Mezhdurechye

Amu-Darya state-owned fisheries company (sovkhoz)

Kok-suu

1 500 - 2 500

1.3 - 1.8

25

40



Sudachye including Ak-ushpa, Taily and Urge lakes

3 300

0.7 - 0.8

1.7

59

Northeastern part of the left bank of Amu-Darya near GLK collector in the west of Sudachye lake

Uchsay fish processing factory

Large Sudachye lake





Near GLK collector in the east part of lake Sudachye

Konyrat fish processing factory

All close to Makpalkol lakes: Makpal, Sarhocha, Birkazan Kisilkeme

600

1.0 - 1.5

3

24

Muinak region, left part of lower Amu-Darya

Tentekarna state-owned fisheries company

Keyser lake located at Karajar

16 000 - 20 000

2.0 - 2.2 1.0 - 1.2

3 3

39 88

Muinak region, left part of Amu-Darya

Taly-uzyak state-owned fisheries company

Ilmekol lake located at Karajar

1 000 - 1 500




Muinak region, central part of Amu-Darya left bank near Karakhar

Tentekarna state-owned fisheries company

Khojahol Lake located at Khojakol

1 000

2

3.5

55

Kungrad region, southern part of Khojakol lake

Konrat fish processing factory

Koptin-kol Lake located at Khojakol

9 500

1.2 - 2.0

6

209

Kungrad region, central part of Amu-Darya left bank and near Khojakol lake

Konrat fish processing factory

Jaunger-kol Lake located at Khojakol

532

1.7 - 1.8

2.5 - 3.0

8

Kungrad region, central part of Amu-Darya left bank and near Khojakol lake

Konrat fish processing factory

Muinak gulf

9 750

1.65

3

78

Muinak region, southeastern part of the Aral Sea

Nurly-hol fisheries cooperative

Rybachy gulf (Sarybas)

4000

1.0 - 1.5

3.4

34

Munaik region in 1 km to the North of Muinak in the southern part of dried bed of the Aral Sea

Tentek Arna fish processing factory

Sarykamysh

300 000

5.7

47

33

South-west of the Aral Sea, 200 km from Turkmenistan border with Karakalpakstan


Shygys Carateren

4 000

3 - 5

30

52

Tahtakul region, foot of Beltau Height

Tahtakul fishery

Botakol and nearby lakes

2 000

1.5 - 2.0

4

18

Tahtakulsky region between Karateren lake and Kok-Darya River (KS - 4)


Atakol and nearby lakes

2 000

1.5 - 2.0

3.5 - 4.5

10

Tahtakulsky region


Tashpenkol

1 000

1.5 - 3

10

1.2

Wimbaisk region, Amudarya right bank, Kuskanatau Height

Wimbaisk fishery

Dauytkol reservoir

5 000

1.5 - 2.0

7

80

Amu-Darya right bank, 47 km to the north of Nukus

Nukus fish processing factory

Karakol

7 000

0.9 - 2.6

2.6

115

Northwestern part of Shumanai region

Shumanai fishery

Akshakol

4 000

1.5-20.0

7

20

Ellicalin region, Amu-Darya right side, 20-30 km from southeastern part of Sultanuzdag

Ellikalin fishery

Ayazkala

9 000

2 - 3

8

40

Berunian region, Amu-Darya right bank and southern part of Sultanuzdag

Berunina fishery

Zhyltyrbas

30 000




Muinak region

Kasakhdarya fish processing factory

Kobeyshungil, Sarykol, Magnit zhargan

50

1.0- 1.5

2

0.3

Karauzyak region

Karauzyak fishery

When Uzbekistan was part of the Soviet Union, the Ministry of Fisheries of the former USSR, in cooperation with the Ministry of Water Management and Uzbekistan Government, in the 1960s-1970s developed a large-scale comprehensive programme of fish production for all types of inland waterbodies. Special attention was paid to education, research, planning, water and fish quality monitoring and other issues. Due to the presence of irrigation systems throughout the plains of Uzbekistan, fisheries planners, developers and managers had to make the best use of different types of irrigation waterbodies (reservoirs, irrigation and drainage canals, lakes storing drainage water).

State-owned fishing companies were established at all large reservoirs and lakes for return water storage. Hatcheries for producing stocking material were constructed in all parts of Uzbekistan. By the 1980s up to 7 000 tonnes of fish per year were harvested from reservoirs and lakes. All fish farms were state owned, financed by the government, and functioned within the structure of the Ministry of Fisheries. They regularly reported on their fish production.

After the dissolution of the USSR the situation changed significantly. The government of Uzbekistan privatized all state-owned fish farms and capture fisheries enterprises and stopped their government financial support. As a result fish production dropped to one third and large-scale fishing in reservoirs such as Charvak, Chimkurgan and several others virtually stopped or was significantly reduced, as for example in Tudakul reservoir, where the reported fish catches dropped from 700 tonnes in the early 1990s to 250 tonnes in the late 1990s. Fish production in ponds has decreased on the average from 3 000 kg to 850 kg per ha. Education and training of specialists also stopped, and the research network came to an almost complete standstill (Kamilov, this volume).

Today, Uzbekistan has no national programme or specific fishery development projects supported by the government or international assistance. Private initiative focuses only on exploitation of rich fish stocks in the Aidaro-Arnasay system using small fishing teams. The fishery potential of waterbodies of the irrigation system of Uzbekistan is largely unexploited.

Between 1996 and 2001 two project proposals were formulated for the development of fisheries on fish farms of the enterprise "Uzbalik". One, a project for a model aquaculture farm using semi-intensive technology, was prepared in cooperation with the Ministry of Foreign Affairs of Israel; the other, for a fish farm for sturgeon production, was prepared in cooperation with a German company. Both projects have not yet been implemented, mainly for the lack of funds on the Uzbek side and because of insufficient experience of Uzbek fishery specialists in implementing such projects.

Prior to independence some experience was obtained in using irrigation systems for fish production in the Golodnaya and Karshy steppes. In the Southern Golodnaya Steppe Canal an experimental fish hatchery for grass carp (Ctenopharyngodon idella) and silver carp (Hypophthalmichthys molitrix) was constructed and operated during 1975-1985. This hatchery produced fingerlings for stocking irrigation canals overgrown with aquatic macrophytes. Fish stocked into the canals cleared them almost completely of aquatic plants and the fish themselves were afterwards harvested for food. While this approach is considered by fishery specialists and engineers as an efficient aquatic weed controlling mechanism, the hatchery ceased functioning and canals are now again overgrowing with aquatic plants. In Karshy steppe there was fisheries in Talimarjan reservoir, and fish ponds were constructed to use drainage waters of Sichankul and Sultan Uezdak. These ponds became successful in fish production. Even this undertaking is now largely neglected.

2. Potential for the use of irrigation systems for fish production

Irrigation systems are present throughout Uzbekistan. Uzbekistan has a good transportation and industrial infrastructure, large rural population and diversified agriculture. All this creates favourable social and economic conditions for development of fish production in all waterbodies connected with irrigation.

Uzbekistan is located in a climatic zone favourable for development of aquaculture in natural waterbodies and in reservoirs (Fig. 2). There is a long season of warm and sunny weather which keeps water warm. The existing water resources provide for a large increase in both capture fisheries and aquaculture. The presence of cold waters at a higher altitude enables production of cold water fish, including trout.

The lowland reservoirs of the Zaravshan, Kashka-Darya, Surkhan-Darya basins of the Amu-Darya middle reaches are suitable for the development of capture fisheries based on warmwater Chinese carps, i.e. silver, bighead, and grass carp, and common carp. In the mountain and foothill storage reservoirs such as Charvak, Akhangaran, Andizhan and several others one could produce cold water fish such as rainbow trout, Issyk-Kul (Sevan) salmon and whitefish (Coregonus spp.). It would be profitable to use the existing ponds, now in private ownership, for creation of fish farms. With a model of a profitable small fish farm, farmers of Uzbekistan could then combine pond fish culture with the traditional farm crop production. This would appear to be an efficient way of boosting the fish production in the country.

Fish hatcheries in Uzbekistan are still functioning, including the breeding and production of fish fry and fingerlings of cyprinids. They have sufficient capacity to provide potential farmers with the required quantities of fry, fingerlings and yearlings for increasing fish production to up to 100 000 tonnes per year. Prior to independence the Uzbekistan fish farms supplied all Central Asia, southern Siberia and some other regions with fry and fingerlings (Kamilov, this volume).

Today there is an obvious shortage of fish in Uzbekistan, with a fish supply of less than 1 kg/person/year. Before 1990 the country processed and consumed annually 70-100 000 tonnes of fish, of which 30 000 tonnes were from the local production, and 40-70 000 tonnes imported. Today’s consumption is only 9-10 000 tonnes (Kamilov, this volume).

The following conditions favour further development of fisheries in Uzbekistan:

Fig. 2
Climatic zones in the Aral Sea basin

Table 6
Return waters in the Aral Sea basin (SIC ICWC data base)

Return waters in the Amu-Darya River basin (Uzbekistan) (million m3 = Mm3)

Catchment areas,
oblasts

Years of
observ-
ations

Catch-
ment
area,
(‘000 ha)

Main
tributaries

Average
salinity
g/litre

Return
waters (Mm3)

Diverted

to a
river
(Mm3)

to
depressions
(Mm3)

for
irrigation
(Mm3)

Upper reaches









Surkhandarya

1990

311

Karasu river

2.35

1 138

510

-

628


1995

324

Antorsky collect.

1.55

1 398

803

-

595


1999

320

VST, K-1, K-2, ...K-5

2.2

1 100

600

-

500

Middle reaches









a) Kashkadarya

1990

485

Yuzhny collector

6.76

1 722

654

1 068

-


1995

495

Kashkadarya river

5.74

2 043

650

1 393

-


1999

490


7.1

2 340

800

1 540

-

b) Bukhara

1990

343

Parsankul, Central

3.69

2 273

650

1 623

-


1995

390

Bukhara Canal

3.11

1 938

510

1 428

-


1999

385

Severny collector Dengizkul

4.2

2 790

810

1 980

-

Lower reaches



Ozerny collector






a) Khorezm

1990

258

Divankul collector

2.98

2 740

-

2 561

179


1995

267


2.02

4 009

-

3 819

190


1999

256


3.7

3 290

-

3 110

180

b) Karakalpakstan

1900

495

KS-1, KS-3

4.2

2 332

388

1 944

-


1905

500

KS-4, KKS,

3.41

2 897

370

2 527

-


1999

500

Beruny collector Ayazkala collector

4.2

2 200

320

1 880

-

Total in the basin (Mm3)

1990

1892


3.98

10 205

2 202

7 196

807

1995

1976


3.08

12 285

2 333

9 167

785

1999

1951


4.45

11 720

2 530

8 510

680

Return waters in the Syr-Darya River basin (Uzbekistan)

Catchment
areas,
oblasts

Years of
observations

Catchment
area
(‘000 ha)

Main
tributaries

Average
salinity
g/litre

Return
waters
(Mm3)

Diverted

to a river
(Mm3)

to
depres-
sions
(Mm3)

for
irrig-
ation
(Mm3)

Andizhan

1990

277

Zambarkul

1.21

2523

2269

-

254


1995

265

Karagukon

1.46

2710

2440

-

270


1999

280


1.65

1264

1200

-

64

Namangan

1990

268

Achikkul

2.21


1010

-

1050


1995

276

Karakalpok

1.08

2037

1030

-

1007


1999

280


2.75

2250

1090

-

1160

Ferghana

1990

349

Achikkul

2.21

3050

2180

-

870


1995

3

Saridzhuga

2.28

3300

2400

-

900


1999

9

Severny

2.8

2970

2020

-

950

Tashkent

1990

379

Urtukly

1.45

2569

2329

-

240


1995

397

Karasuv

1.29

2135

1931

-

204


1999

390

Chilisoy

2.1

2480

2200

-

280

Syrdarya

1990

298

Central

4.19

1712

743

876

93


1995

298

Golodnaya

3.49

1571

831

670

70


1999

280

Steppe Canal Shuruzyak

3.6

1940

390

1450

100

Djizak

1990

2

Djizak main
canal, Ok-
Bulak
KLI

5.6

778

-

736

42


1995

8

4.41

1318


1218

100


1999

5

44

1165


1100

65

Total in the basin (Mm3)

1990

1856


2

12692

8531

1612

2549

1995

1885


3

13071

8632

1888

2551

1999

1890


3

12069

6900

2550

2619

Karakalpakstan Republic and Navoy, Samarkand and Djizak oblasts (provinces), continue to capture a relatively large amount of fish from reservoirs of the lower Amu-Darya and the Aidar-Arnasay system of lakes. The densely populated Fergana valley, has a severe fish deficit.

Taking into account the above conditions, the following areas of Uzbekistan appear to have a good potential for the use of irrigation systems for fish production:

Favourable conditions

Areas with good fish production potential in irrigation systems

Social

Namangan, Andizhan, Fergana, Tashkent and Samarkand oblasts

Economic

Khorezm, Bukhara, Kashkadarya and Tashkent oblasts; to some degree: Karakalpakstan Republic, Navoy, Samarkand and Djizak oblasts

Institutional

Tashkent, Samarkand, Bukhara and Khorezm oblasts

Climatic

Fergana valley, Tashkent, Samarkand, Syr-Darya, Djizak and Khorezm oblasts

Technological

all oblasts of Uzbekistan

3. Constraints in using irrigation systems for fish production

Difficulties of maintaining and developing irrigation in Uzbekistan negatively affect fish production. Among the factors limiting the use of irrigation systems for fish production are the following:

Institutional constraints. Lack of governmental and non-governmental institutional structures to promote the use of irrigation systems for fish production. Absence of legislation ensuring the rights of private fish farmers to a guaranteed water supply within special limits and to trade in fish.

Economic constraints. Lack of government financing and private investments in the industry. Absence of specialized credit lines.

Technical constraints. Lack of protecting devises on diversion structures which would prevent young fish from being discharged with irrigation water onto irrigated fields; lack of corridors between waterbodies including floodplains, river reaches and canals, to make possible the migration of fish and fish fry from and to places of spawning, reproduction and other types of existence; unsuitable or absence of fish passes; priorities for water use, i.e. irrigation demand and hydropower production, which often do not allow maintaining optimal water supply for fish spawning and in nursery grounds.

Ecological constraints: water pollution in irrigation systems, including increased salinities and toxicity.

Social and cultural constraints. Low level of public awareness that the irrigation network can be used for fish production. Shortage of fisheries experts and of fisheries training programmes.

Some constraints cannot be resolved, therefore fish production should be developed in view of the following constraints: (i) water is regulated only for the needs of irrigated agriculture and/or hydropower production, without inclusion of fishery management requirements for sustainable fish production from irrigation waterbodies; (ii) irrigation systems in Uzbekistan are owned by the government, managed by the government and financed from the state budget. The very low budgetary allocation is slowing down any attempt to use irrigation systems for a sound development of fish production.

The following constraints need urgent attention:

The following constraints may be difficult to address, at least initially. These constraints seem to apply also to other countries of Central Asia:

4. Recommendations for better use of irrigation systems for fish production

The experience from the period 1960-1980 shows that in Uzbekistan a significant amount of fish can be produced in irrigation systems (canals, reservoirs, drainage collectors, lakes accumulating drainage water). But at present the irrigation systems are hardly used for this purpose as former mechanisms of fisheries management have disappeared, and new mechanisms have not been created. The rehabilitation of fisheries and further progress in this direction will require a number of measures to be taken:

Institutional aspects:

Economic aspects:

Technical, training and research aspects:

5. Regional situation

Fisheries development in Central Asia has a good potential given the favourable climatic conditions prevailing in this geographical area. This is also supported by the favourable socio-economic setup, with abundance of labour source. The rapid population growth means also increasing demand for food, and a further development and expansion of fisheries is one of the ways which to go.

The available data on water use country by country has shown a significant difference in the use of the total flow for the needs of fisheries (Table 3 and Table 7). For instance, in 1999, 807 million m3 of water or 1.3 percent of its total amount were used for fisheries in Uzbekistan, 61 million m3 or 1.1 percent in Kazakhstan, 75 million m3 or 0.7 percent in Tajikistan, 23 million m3 or 0.01 percent in Turkmenistan and almost zero in Kyrgyzstan. One may conclude that Uzbekistan of all countries in the Region has the best potential for using irrigation systems for fish production.

Table 7
Water use in countries of Central Asia (SIC ICWC data base, Statistics Yearbooks 10-20)

Water use in Kazakhstan (within the Aral Sea basin) (million m3)

Year

Source

Drinking
water
supply

Rural
water
supply

Industry

Fishery

Irrigation
(at rayon
boundaries)

Other

Total

1960


65

50

100

40

9 495

0

9 750

1965


75

60

120

80

10 465

0

10 800

1970


95

90

170

150

12 275

70

12 850

1975


105

105

200

300

11 400

100

12 210

1980


120

130

220

450

12 830

150

14 200

1985


126

143

260

590

9 736

160

11 015

1990


214

147

276

111

10 136

437

11 320

1995

Total:

140

130

180

150

10 100

600

11 300

Surface water

0

30

60

150

10 000

285

10 525

Ground water

140

100

120

0

0

15

375

Drainage re-use

0

0

0

0

100

300

400

1999

Total:

54

51

53

61

4 701

327

5 247

Surface water

0

0

0

61

4 666

112

4 839

Ground water

54

51

53

0

0

15

173

Drainage re-use

0

0

0

0

35

200

235

Water use in Kyrgyzstan (within the Aral Sea basin) (million m3)

Year

Source

Drinking
water
supply

Rural
water
supply

Industry

Fishery

Irrigation
(at rayon
boundaries)

Other

Total

1960


40

25

28

0

2 117

0

2 210

1965


45

35

31

0

2 629

0

2 740

1970


55

40

35

0

2 850

0

2 980

1975


70

45

44

0

3 411

0

3 570

1980


75

50

50

10

3 895

0

4 080

1985


79

52

58

11

4 070

0

4 270

1990


94

70

68

13

4 910

0

5 155

1995

Total:

91

85

56

5

4 730

0

4 966

Surface water

48

20

6

5

4 470

0

4 549

Ground water

43

65

50

0

176

0

334

Drainage re-use

0

0

0

0

84

0

84

1999

Total:

90

52

44

0

3 100

5

3 291

Surface water

45

0

0

0

2 897

0

2 942

Ground water

45

52

44

0

150

0

291

Drainage re-use

0

0

0

0

53

5

58

Water use in Tajikistan (million m3)

Year

Source

Drinking
water
supply

Rural
water
supply

Industry

Fishery

Irrigation*

Other

Total

Basin

1960


150

250

150

50

6 670

250

7 520

Amu

100

90

40

30

2 020

0

2 280

Syr

250

340

190

80

8 690

250

9 800

Total

1965


200

400

250

70

7 210

400

8 530

Amu

130

110

60

50

2 320

0

2 670

Syr

330

510

310

120

9 530

400

11 200

Total

1970


300

580

320

100

8 640

500

10 440

Amu

150

120

80

80

2 530

0

2 960

Syr

450

700

400

180

11 170

500

13 400

Total

1975


390

640

410

120

7 850

600

10 300

Amu

145

150

75

100

3 330

0

3 800

Syr

535

790

485

220

11 180

600

14 100

Total

1980


400

650

420

130

8 550

600

1 0750

Amu

150

160

70

100

3 270

0

3750

Syr

550

810

490

230

11 820

600

14 500

Total

1985


350

620

400

120

7 771

552

9 813

Amu

142

155

65

96

2 142

0

2 600

Syr

492

775

465

216

9 913

552

12 413

Total

1990


309

563

537

336

7 140

374

9 259

Amu

176

133

57

123

3 099

0

3 588

Syr

485

696

594

459

10 239

374

12 847

Total

1995

Total:

320

402

400

90

8 200

40

9 452

Amu

Surface water

170

344

349

90

7 920

20

8 891

Ground water

150

60

51

0

200

20

481

Drainage reuse

0

0

0

0

80

0

80

1995

Total:

155

183

49

50

2 200

0

2 637

Syr

Surface water

5

93

0

50

1 510

0

1 658

Ground water

150

90

49

0

400

0

689

Drainage re-use

0

0

0

0

290

0

290

1995

Total:

475

585

449

140

10 400

40

12 089

Total

Surface water

175

435

349

140

9 430

20

10 549

Ground water

300

150

100

0

600

20

1 170

Drainage reuse

0

0

0

0

370

0

370

1999

Total:

490

135

370

50

7 050

800

8 895

Amu

Surface water

320

100

330

50

6 830

785

8 415

Ground water

170

35

40

0

150

15

410

Drainage re-use

0

0

0

0

70

0

70

1999

Total:

250

55

50

25

2 000

150

2 530

Syr

Surface water

90

0

0

25

1 490

150

1 755

Ground water

160

55

50

0

300

0

565

Drainage re-use

0

0

0

0

210

0

210

1999

Total:

740

190

420

75

9 050

950

11 425

Total

Surface water

410

100

330

75

8 320

935

10 170

Ground water

330

90

90

0

450

15

975

Drainage re-use

0

0

0

0

280

0

280

(*) at rayon boundaries

Water use in Turkmenistan (million m3)

Year

Source

Drinking
water
supply

Rural
water
supply

Industry

Fishery

Irrigation*

Other

Total

1960


60

25

25

10

7 950

0

8 070

1965


80

30

30

15

11 345

0

11 500

1970


90

35

35

18

17 092

0

17 270

1975


110

40

50

10

22 630

0

22 840

1980


130

60

60

15

22 735

0

23 000

1985


146

80

135

28

24 571

0

24 960

1990


187

42

111

35

22 963

0

23 338

1995

Total:

330

70

325

35

22 470

0

23 230

Surface water

145

40

289

35

22 274

0

22 783

Ground water

185

30

36

0

151

0

402

Drainage re-use

0

0

0

0

45

0

45

1999

Total:

363

188

710

23

16 788

3

18 075

Surface water

173

148

670

23

16 601

3

17 618

Ground water

190

40

40

0

150

0

420

Drainage re-use

0

0

0

0

37

0

37

(*) at rayon boundaries

Southern Tajikistan, the flatlands of Kyrgyzstan, the area around the Karakum Canal and northern Turkmenistan have the same climatic, social and economic potential as Uzbekistan. They also have a high percentage of rural population and surplus of labour force and as a consequence a high poverty level. The highest percentage of rural population is in the country with the least developed fisheries, i.e. in Kyrgyzstan, where the rural population makes 73 percent of the total, and Tajikistan, with 69 percent of the total population (Table 8).

Fish yields in Tudakul and Khauzkhan reservoirs reach 60 kg/ha and 30.9 kg/ha, respectively, while in other reservoirs in the region the yields are only 3-7 kg/ha. The development of fisheries in reservoirs serving irrigation will provide employment and contribute to the diversification of food supply. Development of aquaculture in irrigation systems could also result in a manyfold increase in fish supply to markets.

It is estimated that the fish yield potential of lakes, rivers, and reservoirs in the region is about 100 kg/ha/year. This could provide 200 000 tonnes of fish annually to the markets.

Table 8
Distribution of population in the Aral Sea basin (1998) (Statistics Yearbooks 10-20)

Country

Population

Total

Urban

Rural

inhabitants

% of
total

inhabitants
per km2

inhabitants

%

inhabitants

%

Kazakhstan*

2 710 000

6.8

7.87

1 219 500

45

1 490 500

55

Kyrgyzstan*

2 540 000

6.4

19.9

685 800

27

1 854 200

73

Tajikistan

6 066 600

15.2

42

1 880 646

31

4 185 954

69

Turkmenistan

4 686 800

11.8

9.7

2 109 060

45

2 577 740

55

Uzbekistan

23 867 400

59.8

53.2

9 308 286

39

14 559 114

61

Aral Sea basin

39 870 800

100

25.7

15 203 292

38.1

24 667 508

61.9

(*) Only provinces in the Aral Sea basin are included

At present there is no regional collaboration for development of fisheries in return waters accumulated in natural depressions. Discharge of drainage water to depressions without outflow has created many lakes and wetlands, the majority of which are shallow. The largest lakes of this type are Sarykamysh and a system of Arnasay lakes. Because of the low discharge capacity of the Syr-Darya River downstream from Chardara storage reservoir (situated at the border between Uzbekistan and Kazakhstan) during the last decade or so water surplus has had to be released into the Arnasay depression during wet years. This usually has happened in winter, as a result of releases from the Naryn-Syr-Darya reservoir cascade. The volume of water in lakes and wetlands formed from drainage water now reaches 40 km3. To ensure that the salinity level is acceptable for fisheries and to protect biodiversity, the water needs to be diluted with freshwater or from time to time flushed out (Fashchevsky, 1996).

The interest of the world in this issue is apparent. Several projects have been partly implemented but discontinued because of lack of funds. These dealt with wetland rehabilitation and drainage water reuse in Uzbekistan (Dengizkul, Kara-Kyr), Turkmenistan (Sarykamysh), Kazakhstan (Kamashbalik, Aktaus, Atsay-Kuvandraya) (Table 9). Other wetland rehabilitation projects are still in progress and are funded by the Global Environmental Facility "Water Resources and Environmental Management in the Aral Sea basin". When completed these projects will assist in the integrated use of irrigation systems as they will contribute to the improvement of hydrological and ecological situation in waterbodies of the Aral Sea basin and to restoration of their biodiversity, including fish production (Ivanov et al., 1996).

While at present no regional networks exist to deal specifically with the use of irrigation systems for fish production, there is a potential for cooperation in the use of irrigation systems for fish production at the regional level. It is believed that the Interstate Coordination Water Commission (ICWC) is a body capable of taking up this function.

Table 9
List of ecologically significant waterbodies and wetlands of Central Asia with transboundary return waters in which maintenance of sustainable regime in the interests of biodiversity is planned for (SIC ICWC data base)

No.

River basins and countries

Characteristics of waterbodies including wetlands

Flora and fauna

Volume, billion m3

Actual volume, billion m3

Salinity g/L

Amu-Darya basin


Tajikistan






Turkmenistan





1.

Lake Sarykamysh

-

12-15

10-12

Reed, fish, muskrats, birds of passage

2.

Kette-Shor

-

0.5-0.6

4-7

Reed, fish, muskrats, waterfowls

3.

Lake Raman-kol

-

0.3-0.4

6-7

Reed, fish, muskrats

4.

Zengi Bobo

-

0.5-0.6

5-7

Reed, fish, muskrats, etc.

5.

Tedjen

-

0.3-0.4

4-8

Reed, fish, muskrats, birds of passage

6.

Golden Century Karakum
(under construction)

11-13

-

5-8

Fish, birds of passage


Uzbekistan





7.

Lake Dengizkol

5.6

2.3

7.6

Reed, water vegetation, muskrat, gulls, egret, ducks and other kinds of birds of passage

8.

Lake Solyonoye (Zimbobo)

0.150

0072

3.7

Reed and other types of vegetation, fish, egrets, ducks

9.

Lake Kara-Kyr

1.3

0.740

3.0

Reed and other types of water vegetation, fish and waterfowls

10.

Ayak-Agitma Fall

7.3

3.34

2.5-3.5

Reed, water vegetation, fish, egrets, ducks, waterfowls

11.

Lake Khadicha

0.3

0.135

11.5

Reed, fish

12.

Lake Mashan-Kol
W = 4 000 ha

-

0.250

2-2.5

Haylands

13.

Lake Akhcha-Kol
W = 5 000 ha

-

0.257-8

7-8

Reed

14.

Lake Kara-Teren
W = 2 500 ha

-

0.150

4-6

Reed, fish

15.

Gulf of Djiltyr-Bas
W = 28 500 ha

-

0.130

5-7

Reed, tugay and other types of water vegetation

16.

Lake Sudochye
W = 58 000 ha

-

0.880

3-3.35

Various types of water vegetation, fish, muskrats, and birds of passage

Syr-Darya basin


Kyrgyzstan






Tajikistan






Kazakhstan





17.

System of Shieli-Tulekul lakes

-

0.1-0.15

4-6

Reed, fish, waterfowls


Kuan-Darya

N/A

N/A

N/A

N/A

18.

System of lakes in deltaic parts of the river in a quantity of more than 150
Djuansadir marshland;
Karaterin system, Karakamys, Kartma and Jilakda lakes;
Kyzyl Tau lake;
Akshi Tau, Kara-Kol, Shamshi Kol lakes;
Kara-Kuzek and Kandyozek lakes;
Karashalan and Tushi-Bas lakes

N/A

N/A

N/A

N/A

19.

System of Kamyshli-Bas lakes, Raimkol and Tushi-Bas lakes

-

-

-

-

20.

Makpal lake

-

-

-

-


Uzbekistan





21.

Arnasay fall
W = 310 000 ha

-

28-30

4-4.3


22.

System of Arnasay lakes

-

0.15-0.2

6-7

Reed, fish and waterfowls

23.

Tuzkane

-

1.5

6-9

Reed, fish and waterfowls

The top level management organizations from the five countries of the Aral Sea basin are represented by the ministers at the quarterly meetings of the ICWC to discuss the current situation related to water distribution and use, and to formulate water strategy for the forthcoming period. The ICWC consists of three permanent executive bodies: BWOs Amu-Darya and Syr-Darya and SIC ICWC. BWOs Amu-Darya and Syr-Darya are in charge of the operational monitoring of the water limits set by ICWC, and of operation of interstate reservoirs and hydrostructures. The SIC ICWC is in charge of technical policy and manages regional information database on regional water resources.

The ICWC is now also paying attention to the interests of other water resource users including fisheries. It aims at overcoming administrative barriers and tries to involve the general public and private sector, non-governmental organizations and water users in the integrated water resources management both at national and regional levels (Dukhovny and Kindler, 1999).

In our opinion, a developed institutional framework for water management at the regional level and the possibility of regular contacts with governments, related ministries and the general public make ICWC the most suitable structure for information support and development of regional network involving the use of irrigation systems for fish production.

The ICWC Training Centre has branches in all countries of Central Asia. It could train employees of water management operational and maintenance services in fish aquaculture and fishery management of irrigation systems. Assistance of international experts, at least initially, would be essential. This concerns especially the development of small-scale fishery business projects. The ICWC could also assume responsibility for the preparation of strategies and technical support for management of sustainable fisheries in transboundary return waters in the Aral Sea basin. Finally, the SIC, as a permanent executive body of the ICWC, could supervise the implementation of pilot projects testing aquaculture potential of various types of waters supplying and arising from irrigated areas.

References

Anon., 1990. Socio-economic Problems of Aral and Priaralye. Fan, Tashkent. (In Russian)

Anon., 1997. The Main Provisions of Regional Water Strategy in the Aral Sea basin. IFAS, Almaty-Bishkek-Dushanbe-Ashgabad-Tashkent. (In Russian)

Anon., 1998. Biodiversity Conservation. National Strategy and Action Plan. Tashkent.

Anon., 2000. Water Resources, Aral Problem and Environment. Universitet, Tashkent. (In Russian)

Anon., 2001. Rational and Effective Water Use in Central Asia. Diagnostic Report UN SPECA. Tashkent-Bishkek. (In Russian)

Anon., 2001a. Assessment of the Social-economic Damage under the Influence of the Aral Sea Level Lowering. INTAS/RFBR-1733 Project. Final Report. Tashkent.

Dukhovny, V. & Kindler, J. 1999. Developing Regional Collaboration to Manage the Aral Sea basin Water under International and Inter-Sectoral Competition - Water Sector Capacity Building: Concepts and Instruments. A.A. Balkema. Rotterdam/Brookfield.

Fashchevsky, B. 1996. Basics of Ecological Hydrology. Ecoinvest, Minsk. (In Russian)

Ivanov, V. et al., 1996. Review of the scientific and environmental issues of the Aral Sea basin. In: The Aral Sea basin. NATO ASI Series 2., vol. 2: 9-21.

Kamilov, B. The use of irrigation systems for sustainable fish production: Uzbekistan. (This volume)

Zholdasova, M. et al., 1996. Biological basis of fishery development in the waterbodies of the southern Aral Sea region. In: Ecological Research and Monitoring of the Aral Sea deltas: 213-33. UNESCO.


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