ABSTRACT
Statistical methods are used to study the concentration variations for the heavy metals, Fe, Mn, Cu, Zn, Pb, Cd, Cr, Co and Ni at all stations in the different seasons. Higher values are recorded at the stations, which receive drain water. Organic matter, carbonate, phosphate, calcium, magnesium, and heavy metals were analyzed in sediment. The organic matter contents are of irregular trend affected by both agriculture and domestic effluents. The carbonate percent is increased in spring as a result of increasing photosynthesis. The phosphorous concentrations are affected by the sources of drain, agriculture effluents, phosphate fertilizers and organic matter precipitated in the surface sediment. Zinc and iron are of high concentrations in spring and autumn. Manganese concentrations show its maximum in spring and its minimum in winter. High content of copper is in summer and spring near drain. Cobalt is precipitated as cobalt carbonate as a result of Lake water alkalinity. The distribution of lead concentration is of irregular trend. The average cadmium concentration due to drain water is of high level. The high content of Cr was recorded in spring. The behavior of chromium and nickel was explained through their adsorption on iron and manganese oxides surfaces