GROUNDWATER POTENTIAL IN SIKAR DISTRICT OF RAJASTHAN

摘要

Sikar district of Rajasthan is occupied by metasedimentaries of Delhi Supergroup (Porterozoic) exposed in the central and eastern parts and alluvium in western past. Groundwater occurs mainly in weathered mantle/fractured zone of hard rock (granite, quartzite, micaschist, phylite and calc gneiss) and in unconsolidated sediments of alluvium aquifer under water table conditions. During post monsoon, 1997 water level randed between 1.80 to 44.95 m in hard rock area whereas, in alluvium formation it ranged from 2.60 to 59.12m. The average water level during 1997 was +0.14m. Ground water balance as on 1.1.1998 was 20.5827 MCM with 93.6 per cent stage of development. As such the district as a whole under critical category. Out of eight blocks only two blocks, Fatehpur and Lachhmangarh are safe for groundwater development. Other blocks fall under either over-exploited, critical or semi-critical category and therefore need planned development of groundwater resources. In order to rejuvenate the depleted aquifers in these blocks construction of percolation tanks, recharge pond rainwater harvesting platform, sub-surface barrier to recharge to groundwater are recommended.