A Study on the Water Turbidity from Soil Erosion due to Rainfall under Different Percentage of Grass Cover.

Soil erosion due to runoff and rainfall has been quite common in slope areas where vegetation cover is limited. Over the past years there has been quite number of cases of soil erosion on the hill areas due to the unprotected cover. Eroded soil under the influence of runoff and rainfall has given its effect towards the water quality in terms of suspended solids and turbidity and towards the environment in the long run. This paper will focus on the study on the simulation of effects of the water quality due to the runoff and rainfall with the effects on the different percentage cover. This study will also discuss the results and the best practice to improve the water quality by vegetation covers. A full scale experimental works has been done by using the rainfall simulators to obtain the water sample. Each of the sample is been sent to the lab for analysis obtaining results. The studies shows that the grass cover plays an important role in reducing the water turbidity and different percentage of grass cover will significantly change the turbidity results. At the end of the studies, it has been suggested at what percentage of grass cover will be feasible to improve the water quality as well as considering the economic factor.