摘要
分析城市化对地下水补给的影响,无论对研究城市水文循环、水资源供需平衡,还是防治地下水水质恶化都有重要意义。但至今为止,城市化发展将引起地下水补给量的增加还是减小尚无定论,其影响机理也不十分清楚。该文以石家庄市为例,通过分析城市化影响地下水补给的时空效应,最终揭示了城市化对地下水补给的影响机理。结果表明:城市化会导致地下水补给量的增加;地下水开采诱发产生对城市周围地下水流场和地表水的袭夺以及城市供、排水系统渗漏所造成的新补给源的引入是城市化诱发产生地下水补给增量的重要机理;供排水系统渗漏所造成的新补给源是城市地下水补给量计算中必须充分考虑的重要组成。
The study on impact of urbanization on groundwater recharge has a very important significance, not only for studying the hydrologic cycle, supply-demand balance, groundwater overexploitation, but also for preventing and controlling the deterioration of groundwater quality, and for revealing the organic relation between overexploitation and water quality deterioration, the two main problems of groundwater environment. However, up to now, it has not been determined weather the urbanization development would result in the increase or decrease of groundwater recharge, and the impact mechanism of urbanization on groundwater recharge also has not been illustrated. The study on the interaction mechanism of urbanization and groundwater in Shijiazhuang City is a typical example. In this paper, based on the analysis of the importance of groundwater in water supply of the city, and the exploitation and utilization of groundwater, the authors studied the change of groundwater recharge under the impact of urbanization, and further discussed the impact mechanism of urbanization on groundwater recharge. Finally, a frame-figure on the mechanism inducing the increment of groundwater recharge was constructed. The results show: 1) urbanization results in the increase of groundwater recharge; 2) the inducing of groundwater from the well-field around city and surface water by exploitation of groundwater, and the importing of new recharge sources resulting from the leakage of water-supply and water-discharge systems of city, is the important mechanism inducing the recharge increase of groundwater by urbanization; 3) the new recharge sources resulting from the leakage of water-supply and water-discharge systems are one of the important components which should be considered fully in the calculation of groundwater recharge in the urban districts. This study supplies a kind of theory and new approach to study hydrological cycle and water resources in the urban districts.
出处
《资源科学》
CSSCI
CSCD
北大核心
2004年第2期68-73,共6页
Resources Science
基金
河北省科学技术研究计划项目(编号:97457229D)
中国科学院知识创新工程资助项目(编号:KZCX SW 317 01)
