汤山地热水补给及受轨道交通工程的影响

摘要

为研究汤山地热水接受外源水补给的证据及宁句线城际轨道交通工程汤山段对地下热水资源的影响,对汤山地下热水和冷水的18O、Sr同位素比值(87Sr/86St)及水化学指标进行分析,并与河水、库水进行对比.结果表明,汤山地热水并非接受当地降水补给,而是来自于具有同位素贫化特征的外源水,外源的深循环水在汤山两端沿断裂构造向地表排泄,形成温泉.宁句线城际轨道交通工程对汤山温泉的补给与径流条件不会产生影响.%In order to study the evidence of the geothermal water recharge in Tangshan supplied by the extraneous source and the impact of the Nanjing-Jurong intercity rail transit engineering to the geothermal water resource,δ18O,87Sr/86Sr,and hydrochemistry of the geothermal water and underground cold water were analyzed and compared with those of surface water and reservoir water.The results show that the geothermal water in Tangshan is not supplied by local precipitation,but supplied by extraneous water with the characteristics of isotope depletion.The extraneous water flows out at both ends of the Tangshan Mountain along the fault structure after long distance and deep circle and becomes hot springs.The Nanjing-Jurong intercity rail transit engineering will not affect the recharge and runoff of the geothermal water in Tangshan.