Results
Physicochemical parameters
Water temperature follows that of the air, the lowest temperature
(19.06 C) was recorded in winter and increased gradually
in spring until it reached its peak during summer (28.26 C)
and decreased again during autumn (Fig. 2a). pH lies in alkaline
side where it ranged from 8.06 in autumn to 8.52 in winter
(Fig. 2b). Transparency reached its maximum (342.2 cm) during
autumn while, the lowest one (224.4 cm) recorded in spring
(Fig. 2c). Conductivity showed the highest value in winter and
the lowest value was recorded during autumn, it ranged
between 195.2 and 234.5 lmohs/cm (Fig. 2d). Dissolved oxygen
in the area ranged between 4.8 and 7.4 mg/l in winter,
3.5 and 5 mg/l in spring, 3.2 and 5 mg/l in summer, and 4.9
and 7.5 mg/l in autumn (Fig. 2e).
Mean water depth in the northern sectors was more than
the water depth in the southern sectors in the main channel
(Fig. 2f). The analysis of sediment showed that sediment types
in the middle of the main channel were sandy mud and mud