PART II - SYNTHESES OF INFORMATION ON SELECTED AFRICAN RESERVOIRS (continued)

PARTIE II - SYNTHESES DE L'INFORMATION SUR CERTAINS RESERVOIRS AFRICAINS (continuer)

LAKE NASSER (EGYPT) (continued)

Table 1. Morphometric features of Aswan High Dam reservoir and Lake Nasser at 160 and 180 m level

Table 2. Water level (metres above MSL) in 1966–1982

Table 3. Area and volume of the reservoir (Lakes Nasser and Nubia) at various storage levels

Table 4. Water temperature of Lake Nasser

Table 5. Dissolved oxygen concentrations (mg/l) at different stations in selected years

Table 6. Water transparency (cm) of Lake Nasser and Lake Nubia (1972–1979) measured by Secchi disc

Table 7. Annual average transparency (cm) of Lake Nasser

Table 8. Electrical conductivity (μmhos cm^-1) of Lake Nasser

Table 9. Average values of electrical conductivity (μmhos cm^-1)

Table 10. Nutrient concentrations (mg/l)

Table 11. Ranges of pH at various stations

Table 12. Seasonal ranges of chlorides (mg/l)

Table 13. List of fish species for Lake Nasser

Table 14. Calculated weight (g) for different age groups

Table 15. Diameter of mature ripe eggs of important fish species

Table 16. Fecundity (number of ovarian mature/ripe eggs in peak of spawning season)

Table 17. Percentage of important fish species in total landings in selected years

Table 18. Composition of fish landings according to food habits

¹ Tilapia
² Alestes
³ Lates, Hydrocynus, Bagrus
⁴ Labeo, Barbus, synodontids, schilbeids, mormyrids

Table 19. Percentage of fresh fish landings in selected years

Table 20. Distance between the suggested villages and projected Egyptian-Sudan road

Table 21. Percentage composition of fish species in the commercial catch from the River Nile (1976/78)

Table 22. Fish landings and number of boats from the River Nile (Egypt) in selected years

Figure 1. A - Location of the Aswan High Dam reservoir in Egypt and Sudan
B - Lake Nasser and Lake Nubia

Figure 2. Maximal and minimal water levels (m a.s.l.) of Lake Nasser in the period 1965–1981

Figure 3. Regions of the Aswan High Dam reservoir

Figure 4. Monthly water temperature at the surface, and at 20 m and 40 m depths at El-Madiq and Tushka

Figure 5. Dissolved oxygen (mg/l) profile in Lake Nasser in different seasons at different selected stations in different years

Figure 6. Extent of flood turbid water in some selected years

Figure 7. Seasonal average Secchi disc transparency (cm) for some stations of Lake Nasser (1974–79)

Figure 8. Electrical conductivity (umhos cm^-1) of Lake Nasser during summer and autumn in selected years. HD = High Dam

Figure 9. Average values of electrical conductivity of Lake Nasser in different seasons. HD = High Dam

Figure 10. Average maximum and minimum bicarbonate concentrations of surface and bottom water of Lake Nasser during 1970–78

Figure 11. Carbonate concentrations of Lake Nasser between 1970 and 1978

Figure 12. Phytoplankton at different stations along main channel of Lake Nasser in March and August 1976

Figure 13. Zooplankton at different stations along the main channel of the Nile flooded by Lake Nasser, March and August 1976. (A) Number (thousand/m³),
(B) Percentage of Copepoda, Cladocera and Rotifera

Table 14. Commercial fish landings (1966–1981)

Table 15. A - Percentage of fish of different food habit among landings of Lake Nasser
B - Comparison between lakes Nasser and Nubia, exploratory fishing in July 1979

Figure 16. Fish production per hectare or per m³ during 1968–78

Figure 17. Fish landings per boat and per fishermen

Figure 18. Suggested human settlement sites in Lake Nasser

Figure 19. Transportation and navigation routes in Lake Nasser

Figure 20. Frequency of main fish species in catch of gillnets (A) and trammel nets (B) (1972–1974)

Figure 21. Distribution of percentage of Alestes baremose and A. dentex (A) and Eutropius niloticus (B) in lakes Nasser and Nubia

Figure 22. Relationship between tilapia and total landings

Figure 23. Relation between Tilapia landings and male's gonad index

Figure 24. Length frequency composition of Tilapia nilotica and Tilapia galilaea

Figure 25. Mean length and weight of some species caught during experimental fishing in Khors El-Ramla and Kalabsha

Table 26. A - Relation between morph-edaphic index, alkalinity and fish yield in Lake Volta (Henderson et al., 1973)

B - Maximum bicarbonate concentration versus fish production in some years in Lake Nasser