Co showed strong positive correlation with Cr at 0.05 level. Co concentrations in the sediments were highest during the winter than the spring,Figure 3(f). Spatial variation of Co concentration was given in Figure 4(f), and the maximum value was 38.73 mg/kg at S14 while the minimum value was 21.88 mg/kg at S2. As well as S14, high values were reported at S1,S7, S9 and S12.