Analysis of watershed characteristics of Nalagarh watershed, Himachal Pradesh for optimization of recharge structures and management of groundwater

Abstract

The study involves the study of Nalagarh watershed in Himachal as a topographically delineated hydro-geological entity which is allowing the entire surface runoff of its sub-watersheds to channelize through defined streams and drainage network to certain points in the watershed. Geomorphic analysis of Nalagarh watershed has enabled the study of qualitative and quantitative parameters of the watershed for efficient utilization and optimizing the management of its surface and groundwater resources. As Nalagarh valley has recently witnessed the highest industrial growth in the district and State of Himachal Pradesh, the study becomes all the more impertinent. The watershed has been delineated into 13 micro watersheds, based on the geomorphic analysis. To use the surplus monsoon runoff, a detailed study has been carried out for the computation of utilizable runoff and the number of structures that can be planned for its utilization. To effectively plan the rainwater harvesting structures, the morphometric analysis has been done.