Abstract: In-situ hydrological test is a major method to obtain the hydrological design parameters. For the upper perched and the lower artesian groundwater parameters, large well diameter for pumping is usually required in order to minimize the testing error from the well installation. However, due to the site condition constraint in the preliminary investigation phase for the municipal projects, the well pump tests are performed with the relatively small well diameters. This paper presents a case history of the well pump test in Hangzhou Asian Game Village. In-situ tests were performed in the upper perched in silt and silty fine sand and lower artesian groundwater in rounded ground layers with various well diameters. The results were evaluated and the differences between the small and large well diameters were obtained.

Key words: Well Pumping Tests, Perched Water, Artesian Groundwater, Various Well Diameters, Data Comparison