摘要
通过对城市地下水包气带特征、地下水的排泄和补给特征、雨水排泄特征的系统分析,认为由于城市地下水系统受自然条件和人为因素双重作用的控制使之表现出与自然状态下完全不同的特征:由于地表的硬化,城市包气带由三层结构变为四层结构,即地表硬化层、土壤水带、中间带和毛细水带;城市地区的人文历史沉积也会对包气带造成影响;雨水主要通过城市的排水系统排泄,地下水主要通过人工开采排泄,都表现出集中排泄的特点。文中还对酸沉降对城市地区地下水水质和包气带性质可能受到的影响进行了初步的分析。
In urban regions, the groundwater is controlled by natural and anthropogenic factors. In this paper, the anthropogenic influence is analyzed including the surface sealing, artificial sediment, and rainwater drainage system and groundwater exploitation. These factors effect the urban groundwater greatly： The structure of unsaturated zone is changed from three layers to four layers ealing layer, soil layer, middle zone and capillary zone; The rainwater recharge to groundwater is less than other regions; the land evaporation is limited in some range. So the methods studying urban groundwater should adapt these characteristics. In this case, a groundwater vulnerability assessment method in urban is proposed. At last the effect of acid deposition to groundwater is discussed.
出处
《新疆环境保护》
2006年第4期22-25,共4页
Environmental Protection of Xinjiang
关键词
城市地下水
人为影响因素
地表硬化
集中排泄
酸沉降
urban groundwater
anthropogenic influence
surface sealing
centralized discharge
acid deposition
