Seasonal variation for levels of nutrients in water from Southern Iraqi marshlands after rehabilitation 2003

الملخص EN

The levels of nutrients; Nitrites, Nitrates, Phosphates and Silicates were determined seasonally for the period Winter, Spring, Summer and Autumn 2004 in water from eight sites, 1-Al-Tarabah, 2-Umm Al-Ward in Al-Hawizeh marshes, 3- El-Harasheen,4-Al-Fartoos,5- El-Saddah along Al-Izz river in the Central marshes, 6- Al-Duboon, 7- Al-Nagarah and 8- Al Barghah in Al-Hammar marshes.

Collected water samples from all stations were transferred to Marine Science Center labs for Chemical analysis.

Compared to nirates, the recorded nitrites were low in the range 0.001-1.300 μg at N-NO2 -l, while nitrates characterized by high values specially in stations 1 and 2 and during winter which were in the range 1.939-42.200 μg at N-NO3-/1 .Phosphate levels were high in Al-Haweizh marshes while Al-Hammar marsh was characterized by high levels of silicates which were in the range 58.1-146.811 μg at Si-SiO2 / l.

These differences were explained on the basis of the nature of the area and quality of the soil