DUGWELL INFLOWS FROM SHALLOW DECCAN BASALT AQUIFERS

Inflow conditions represent an important aspect of dugwell drawdown an d recuperation in shallow Deccan basalt aquifers. ''Inner'' boundary c onditions like well storage, connection between the well and aquifer a nd distribution of inflow zones representing the hydraulic conductiviy around dugwells can be deciphered from drawdown and recovery data of dugwells tapping a typical shallow phreatic aquifer from the Deccan ba salts. It is possible to calculate the aquifer response of a dugwell d uring drawdown and recovery phases. The inflow conditions in dugwells and their effect on the drawdown and recovery can be well illustrated by plotting well logs alongside single logarithmic graphs of drawdown and recovery against time. Diagnosis of such graphs reveals how the hy draulic conductivity around the dugwell influences segments of the dra wdown and recovery of dugwells.