Total magnetic investigations for identification of permeable groundwater zones in hard rock terrain, O.U campus, Hyderabad, Telangana State, India

The present investigation consist of vertical magnetic investigations in the Osmania University Campus (780 31ʹ 00ʺ E longitude to 780 32ʹ 26ʺ E longitude and 170 23ʹ 45ʺ N latitude to 170 25ʹ 42ʺ N latitude) is situated in an area of approximately 6.58 sq kilometers (1627.32 acres) in a granitic terrain. Taking 20m station interval along the traverses trending Six traverses (FF1, II1, NN1, OO1, QQ1, and RR1) were approximately in E-W direction and remaining three traverses (AA1, BB1, and CC1) were approximately in N-S direction were carried out for structural configuration of the region. Qualitative analysis of vertical magnetic data using gradient techniques of coefficient of variation has been performed to anticipate the subsurface structures and assemblages of groundwater aquifer zones and derive several lineaments and magnetic linear features (Magentic Highs and Lows) suggesting the presence of vrious geological lineaments. From coefficent of variation map eight non permeable zones (A,B,C,D,E,F,G,H) and five (1,2,3,4,5) permeable zones were identified which compare with the borehole data showing as groudnwater occurrence and aquifer magnetic characters of the study region.