STUDY OF ANAEROBIC CONDITION IN RESERVOIR SEDIMENTS

Abstract

Water and sediment quality change experimental study was done for eight months using water and sediment in a reservoir. On the condition that the oxygen in water is saturated, in the -9～-11cm depth layer, organic nitrogen and organic phosphorus in the sediments were decrease. Anmonium nitrogen, inorganic phosphorus and total iron in the porewater increased compared by initial values. These results show that the organic matter in the sediments were dissolved and removed in the porewater. The anaerobic condition by nitrogen proceeded. On the condition that the oxygen in water is saturated, the concentration of iron in the water was low value, but in the the -9～-11cm depth layer, the anaerobic condition by iron proceeded. Characteristic of anaerobic reservoir sediment condition change was similar to paddy field and lake.