Abstract
The present investigation was undertaken to study the limnology of Kelo river at five locations in Raigarh and the effect of domestic sewage and industrial effluents on the physico-chemical conditions of the river water.In the stretch of river under study, it was found that the water quality in premonsoon near old palace ghat is above maximum permissible limit for some heavy metals. However, water quality at same sampling points was found above maximum desirable limit but below maximum permissible limit in postmonsoon season. It was found that drains are adversely affecting quality of river water along the stretch of study as the waste is discharged into Kelo river without pretreatment. Irrigation water and surface run-off water from the surrounding farm lands also affect river water quality at some locations.