The Experimental Investigations on Motion Features of Groundwater Flow near the Pumping Well

Using the 3D pumping test device, the author has completed a number of pumping tests about phreatic and artesian water and obtained a large amount of observational data. Experiments show that: as for both phreatic and artesian water, the water head variation of the observation wells, from the pumping well is far more higher and nearer than the lower, leading to significant groundwater cone of depression distribution around the underground water pumping well. At the same time, the water heads of different observation pointing at different heights of each observation well are higher to lower from top to bottom, which are characterized by showing that the water has a top to bottom motion component while groundwater has migration and accumulation from the surrounding water boundary to the pumping well, i.e. the water movement direction is inclined. The same is true for artesian water. An analysis found the result is that not only head pressure plays an important role, but also water gravity does this too. When the water is pumped, the artesian aquifer near the top roof has a stronger water flow near the supply source.