Studies on Ground Water Pollution due to Sewage Water

摘要

Initial analysis of sewage water sample found strongly' alkaline in nature with cations followed decreasing order of Na~+ > Ca~(++) > Mg~(++) > K~+. Whereas, anions followed decreasing order of HCO_3~-> Cl > SO_4~- > CO_3. The sewage water was classified under C_3S_1 irrigation class, at which indicated marginal salinity and safe use for irrigation purpose under well drained condition of soil. After passing through soil column pH decreased and EC increased. In respect of cations leachate showed increase in Ca~(++) and Mg~(++) and decrease in Na~+ ions. The calcium and bicarbonate dominated ions may have increased the soil pH and affected structure of soil. Average value of hydraulic conductivity of soil irrigated by well water was 1.01 m day and soil irrigated by bore well water was 0.7678 m day.