Experimental Analysis of Runoff for Rain Water Harvesting Catchments with Surface Improvements

摘要

If the natural soil does not meet the requirements of the structure to be built, for rainwater harvesting catchments, alternate solutions like changing the place of the construction or removing the unsuitable soil layer are uneconomical. For this reason, improvements of the soil properties with various admixtures are widely used in the engineering applications today, as an appropriate and economical solution. This paper focuses on catchment improvement of dune sand fields of Western Rajas than for water harvesting by addition of Bentonite clay in dune sand. In this study four water harvesting structures (Taankas) were constructed and two catchment surfaces were improved with Dune sand mixed with Bentonite clay and the other two by murum. There was significant yield in catchments prepared from the Dune sand Bentonite mix compared to murum.