Well Systems

Well systems remove contaminants from groundwater and stop the plume from further migration by manipulating the subsurface hydraulic gradients. Three general classes of well systems are well points, deep wells, and injection wells. Well points use suction lifting as the standard technique for pumping water; therefore, they can be used only for shallow aquifers where the suction lifting is less than 25 feet. Figure 9.17.1 shows several closely spaced point wells connected to a centrally located suction lift pump through a single main header pipe. Deep-well systems are used for greater depths and are usually pumped individually by submersible pumps. Dual pumps are used for floating product recovery as shown in Figure 9.17.2. In injection wells, the injection of clean or treated water into the aquifer flashes the aquifer or forms a barrier to groundwater flow.

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