Seasonal variations in physico-chemical characteristics of River Yamuna in Haryana and its ecological best-designated use
Abstract
Various physico-chemical characteristics of the River Yamuna flowing in Haryana through Delhi were studied in the summer (April 1998) and winter (Jan.–Feb. 1999). Ecological parameters like dissolved oxygen (DO), pH, nitrate (NO3−), sulfate (SO42−), and phosphate (PO43−), were analyzed and compared with standard permissible limits to assess the best-designated use of the river water for various purposes. The river in Delhi upstream was of better quality whereas the Delhi downstream stretch was polluted as indicated by very low DO and high total dissolved solids (