Estimating aquifer transmissivity in a basin based on stream hydrograph records using an analytical approach

As an important aquifer parameter, transmissivity significantly contributes to the development of local and regional water resources. By integrating the instantaneous recharge theory, the master recession curve and the recession-curve-displacement method, the study estimates the transmissivity in a basin based on stream hydrograph records by developing an analytical approach. Rainfall characteristics of wet and dry seasons, as obtained from the stream records of the Leeling streamflow gauging station in southern Taiwan from 1991 to 2004, are also considered. A case study demonstrates the feasibility of the proposed analytical approach in estimating transmissivity accurately by comparing with field records of data obtained from a pumping test and the master recession curve of the wet season. The proposed analytical approach is useful for basins where well data is scarce.