Abstract: The coefficient of permeability is one of the most important hydrological parameters for the dewatering design. Due to the complexity and diversity for the site hydrogeology, the result of the coefficient of permeability might be greatly different. Based on the pumping tests in the geotechnical investigation of Hangzhou Subway project, different methods of obtaining the coefficient of permeability have been used in the interpretation of the insitu testing results with data collected by the inhouse made automatic data acquisition system.

Key words: Pumping tests, Coefficient of permeability, Fully penetrated well, Automatic data acquisition system