Influence of Seasons on the Physico-Chemical Water Quality Parameters of Halkurke Tank and Honnavalli (Hirekere) Tank Waters

Considering the impacts of agricultural runoff, domestic sewage and other anthropogenic activities on the quality of surface water, a physico-chemical study regarding water quality assessment of Halkurke tank and Honnavalli tank water samples belonging to Tiptur Tahsil was carried out for one year to know the seasonal variation and to assess water quality. In the present study, physico-chemical parameters such as temperature, pH, EC, TDS, TH, alkalinity, carbonate, bicarbonate, chloride, sulphate, phosphate, sodium, potassium, calcium, magnesium and boron were estimated. To check the suitability of water for irrigation SAR, % Na, RSC and RSBC parameters were evaluated. The results revealed that the physico-chemical parameters were within the range prescribed by BIS for drinking purposes, but they were on the higher side. The values of pH were on mild alkaline side due to higher alkalinity. Higher values of SAR (5.68 and 4.19), EC (704 and 732.25μmhos/cm), RSC (4.3 and 2.81 meq/L) and Na% (72.38 and 62.71) pose salinity and permeability problems to soils and put the said water samples under medium quality for irrigation purposes. Since these tanks are the only sources to recharge the underground water of the area, groundwater quality of these regions will also be gradually affected.