تأثير المطروحات السائلة الناتجة لمحطة النجيبية لتوليد الطاقة الكهربائية الحرارية على بعض الأحياء المائية في شط العرب

الملخص EN

The study was conducted the effect of liquid effluent of Al Nagibiaya on the density of Mollusca community in four stations in Garmat Ali river during the period from October 2012 to September 2013.

Some physical- chemical features of the water were studied such as air and water temperature, salinity ,conductivity ,PH, BOD,COD,total dissolved solid, dissolved oxygen, total hardness, calcium, magnesium, chloride, sulphate and silicate.

The results of the current study that the air and water temperature ranged between 13-37 and 12-46 C° respectively, salinity value ranged between 1.33-8.24 mg/l while PH ranged between 6-8.2 .Dissolved oxygen ranged between 0.12-11.5 mg / l and BOD ranged between 2-5 mg / l while COD ranged between 3-11,5 mg/l.

Total suspended solid ranged from 1-66 mg / l while dissolved solid ranged from 1456-798 mg/l .Total hardness ranged from 300-3000 mg/l.

The value of calcium ranged from 200-1800 mg / l while magnesium ranged from 100-2300 mg/l also chloride ions ranged from 350-1920 mg/l and sulphates ranged from 150 -6525 mg / l and silicates ranged from 0.1-20 mg / l.

Study also rcorded population density of Mollusca which ranged between 20 -8180 ind.

/ m2 .Five species were recorded such as : Corbicula fluminalis, C.

fluminea, Melanopsis nodosa, Melanoides tuberculata, Bellamya bengalensis.