福州温泉区地下热水开采时空分布特征分析

福州市中心城区蕴藏着丰富的地下热水资源,但是随着城市的发展,在地下热水需求不断增长且无计划的强烈开采状况下,大部分自流泉已消失,地下热水水位已成明显下降趋势。针对这一状况,从开采量及热水水位时空分布的角度,对比分析了第四系热储层及基岩热储层中水位的动态波动特征及漏斗展布状况。研究结果表明,地下热水位随季节变化呈现有规律的波动,不同部位波动幅度各异;多年的开采,已使得地热水位在持续性下降,漏斗中心水位在逐年加深,热资源在逐渐流失。指出加强地热资源开采量监控及建立比较完善的地热资源管理系统的迫切性,以实现资源的合理利用和可持续发展。

Space-time distribution of geothermal groundwater exploitation in thermal spring area of Fuzhou

There are abundant geothermal water resources in downtown of Fuzhou City. But with the development of the city, most of the artesian springs have disappeared and the thermal water table has obviously declined because of the increasing thermal water demand and intense exploitation without planning. Thus dynamic features of geothermal water table in thermal storage layer of quaternary period and bedrock and funnel distribution were compared and analyzed according to exploitation intensity and space-time distribution of thermal water level. The result indicates that geothermal water level regularly surges with the variation of seasons, and the range of surge is different in different locations. Geothermal water level has continuously descended and the central level of funnel has deepened annually because of long time exploitation, which means that the heat resources are gradually diminishing. In order to realize reasonable utilization and sustainabledevelopment of resources, supervisory control of geothermal exploitation must be strengthened and resource management system must be perfected.