MODELING OF ARTIFICIAL RECHARGE WELLS OF DIFFERENT SHAPES AND EFFECT ON RECHARGE EFFICIENCY

摘要

(1) The combination of sand tank experiment and numerical experiment was effective to discover the flow feature of the artificial recharge well. When large scale field experiment might be difficult to conducted, this method was an effective ways to design the size of the recharge wells. (2) There was no a linear relationship between average recharge and well depth/diameter. The well depth had more effect on the recharge rate than the well diameter did. (3) According to the well depth, the recharge well could be divided into dry well, dry-wet well and wet well. The dynamics and steady shapes of the water mound were distinct, when recharge wells of different types were selected for injecting water. (4) The recharge rate of per unit well depth (RPUD) was used to determine the optimum recharge efficiency. The relationship between RPUD and well depth could be divided into four sections. The RPUD would reach the optimum value in the section Ⅲ.