一、前言一般人工回灌地下水的目的,大致分为:地下水盐硷化和地基下沉的防治;工业用水的冷却;水资源的地下水库化;污水的净化等。近年来,如以我国部分地区正在实施的人工回灌地下水为例,就有防止因过量抽水而导致的地下水源枯竭和地面沉降;把作为水资源的含水层地下水库化等项目。人工回灌地下水,是在用水量不多的时期,为把多余的地面水灌入地下贮存起来和防止地基下沉而设计的。然后在用水量多的时期用人工回灌地下水来补给地面水量的不足。根据这样的目的来利用地下水时,水温就成了重要的因素,而抽水时予测水温,就有必要加以考虑。本研究是试图把人工回灌地下水再行抽出时的抽水温度用差分法数值计算进行予测。且对下列问题进行了探讨:(一)抽水温度计算值与现场实际测定值的比较;(二)地 I. INTRODUCTION The purpose of artificial recharge of groundwater is generally divided into: salinization of groundwater and prevention and treatment of foundation subsidence; cooling of industrial water; underground water storage of water resources; purification of sewage. In recent years, taking artificial recharge groundwater being implemented in some areas of our country as an example, there is prevention of groundwater depletion and land subsidence caused by excessive pumping; projects such as the underground aquifer aquifer as water resources. Artificial recharge of groundwater, is in the period of low water consumption, in order to sink excess groundwater storage underground and prevent the foundation sinking and design. And then use the artificial recharge of groundwater in the period of more water to replenish the shortage of surface water. When using groundwater for such purposes, water temperature is an important factor, and when pumping water to measure the water temperature, it is necessary to consider. In this study, we tried to predict the pumping temperature when the artificial recharge ground water was withdrawn again by using the difference method. And the following issues were discussed: (a) comparison of calculated pumping temperature and the actual measured value; (b)