Evaluation of Soil permeability and Aquifer parameters of Alanthurai watershed located at Coimbatore district in TamilNadu

Abstract: The present study was carried out to extract the soil permeability of the collected surface soil samples and estimated the aquifer parameters of the Alanthurai watershed region located at Coimbatore district. Twenty one numbers of undisturbed surface soil samples were collected throughout the watershed area using standard mould and it was tested in the soil mechanics laboratory. The permeability values of the collected soil samples ranged from 1.39 x 10-3 cm/sec to 8.3 x 10-3 cm/sec. From the results of the soil study, it was observed that the watershed consists of moderate degree of permeability. Pump out test was conducted in the field and the values of drawdown in the observation well were measured and tabulated. The values of co-efficient of transmissibility and storage co-efficient were obtained by Cooper Jacob's and Chow's methods.

Keywords: Permeability, Watershed, Transmissibility, Storage Co-efficient, Pump out test