PROBLEM TO BE SOLVED: To prevent particulates from depositing in a pumping and return well.;SOLUTION: A pumping and return well comprises: a water permeable pipe having a plurality of holes in the side, disposed in a water-bearing layer; a tip reinforcing rod attached to the tip of the water permeable pipe; a drain pipe, one end of which is disposed in the tip reinforcing rod; and a water supply pipe located at the top of the drainage pipe. It is desirable for one end of the water supply pipe to be disposed in the tip reinforcing rod. It is also desirable that at least a part of the tip reinforcing rod be in the lower layer below the water-bearing layer. Further, it is desirable that at least the tip part of the tip reinforcing rod be conical shaped, pyramidal shaped, or shell shaped.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2019,JPO&INPIT
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