ANNOUNCEMENTS
T.begur microwatershed, a part of semi arid watershed is located in southern peninsula close to the city of Bangalore. Rapid development in the various sectors, particularly, agriculture and industry in this area has lead to ever increasing demand for groundwater to meet the requirements. Increased demand and over-exploitation of groundwater in this watershed area has necessitated the search for potential groundwater zones. For identification of the potential artificial recharge site, it is essential to understand the subsurface geology of the area.
This study is an attempt to understand the subsurface geology of T.Begur microwatershed and make suitable recommendations to arrest the depletion and augment groundwater resources of the study area thus ensuring its long-term availability in the area. These objectives have been achieved through detailed field survey and analysis of the field data collected during resistivity survey employing Vertical Electrical Sounding (VES).
Analysis shows that the study area is a typical hard rock region. Parent rocks are fractured and weathered. The common area to be recharged has high permeable zone extending upto 25m and could possibly be a suitable recharge site.
On the basis of the result of analysis recharge structures like; percolation pit, recharge shaft, recharge wells are found to be suitable and has been recommended. Besides, measures like; encouraging the community for, rooftop water harvesting, for switching over to growing less water intensive crops, for diversifying livelihood options, have been recommended.
