Well inventory Data Analysis (WIDA) of Byramangala Watershed, Bangalore Urban District, Karnataka, India

Abstract

The Study area is bounded between latitude 120 45’00’’ N to 130 00’00’’ N and longitude 770 23’ 00’’E to 770 35’ 00’’ E in Toposheet Nos. 57 H/5 and 57 H/9. The study of bore well inventory data in byramangala area is carried out and data of 142 bore wells were collected. The minimum depth of bore wells drilled is 80 m and maximum depth drilled is 1500 m. The minimum inserted casing is 40 m and maximum is 200 m. The minimum yield of groundwater is 2 inches and 3 inches pre-monsoon and post-monsoon seasons respectively. Whereas, maximum yield of groundwater observed in bore wells are 3 inches and 5 inches in pre-monsoon and post-monsoon seasons respectively. The bore well inventory analysis reveal that 68% of bore wells having good yield and 44% having low yield in pre-monsoon season whereas, in post-monsoon season 98% of bore wells having good yield and 8% having low yield.