冀中平原地热水资源变化特征及可持续利用性.doc

冀中平原地热水资源变化特征及可持续利用性 　　摘要：针对冀中平原辛集地区地热水开发利用中出现的地下水位大幅下降问题，通过研究1999年以来该地热田地下水位的年际及年内变化特征、趋势和地下水位降幅变化规律，及其与上游山区年降水量之间关系，结果表明：（1）辛集地热田地下水水位下降幅度，不只是随着地热水开采量变化而变化，还存在其他影响因素。有些年份，开采量增大，而地下水位的降幅却减小，表明该地热田存在外域补给水源的补给。（2）通过该地热田地下水位下降幅度与上游山区年降水量之间关系分析表明，随着上游山区年降水量明显增大（或减小），该区地下水位降幅呈减小（或增大）特征，辛集地热田地热水资源具有一定的更新补给能力。（3）目前该地热田地下水资源开发利用已处于超采状态，急需压采或人工增大补给等措施 关键词：冀中平原；地热水资源；地下水位；变化特征；年降水量 中图分类号：P641文献标志码：A文章编号：1672-1683（2017）01-0150-05 Abstract：In view of the sharp decline of groundwater level during the development and utilization of geothermal water resources at Xinji county in Central Hebei Plain，this paper studied the inter-annual and annual variation characteristics and trend of the groundwater level and the variation pattern of the water level decline in the geothermal field since 1999，as well as their relationship with the annual precipitation in the upstream mountains.The results showed that：（1） As geothermal water yield increases，the groundwater level of the geothermal field declines，and the growth of groundwater level at the non-heating period is decreasing year by year.（2） The development and utilization of the geothermal field is not simply consumption of groundwater storage resources.The groundwater level decline range is not only related to the amount of geothermal water yield，but also to the annual precipitation in the upstream mountains.As the annual precipitation increases （decreases），the decline of groundwater level decreases （increases）.（3） The groundwater resources of the geothermal field have already been over-exploited.It is urgent to control the exploitation or increase the supply. Key words：Central Hebei Plain；geothermal water resources；groundwater level；variation characteristics；annual precipitation 冀中平原（河北平原的保定-石家?f-邯郸-衡水一带）地热水资源开发利用近20年，倍受关注。该平原地热水资源比较丰富，但是由于对该区地热水资源形成和变化成因认识不足，且开发利用引起地热水位大幅下降 有关地热资源可持续利用问题研究较多[1-13]。董华松等[2]利用遗传算法实现了对地形地貌复杂区地热资源的预测，高志娟等[3]曾对华北地区地热资源更新能力进行研究。刘杰等[4]、王曦等[5]和高凤栋等[6]先后探讨了天津地热资源合理开发及可持续利用问题。李金鹿等[7]提出了河北省地热开发利用模式