数值模拟法划分地下饮用水源保护区——以内蒙古呼和浩特市城市水源地为例

Division of the drinking groundwater protection area based on numerical methods:A case study near Hohhot in Inner Mongolia

科学合理地划分地下饮用水源保护区,有助于以最低的经济代价防范地下水源被污染。以内蒙古呼和浩特市为例,在对其水文地质条件进行详细分析的基础上,利用MODFLOW建立地下水渗流场,利用MODPATH进行粒子反向示踪模拟,然后以井口粒子运移100 d和1 000 d的范围为标准确定一级和二级保护区的范围。根据水源地的特点,从社会经济和工程技术等方面提出了合理的地下水保护建议及保护区管理措施,为地下饮用水源保护区划分的发展趋势和研究方向提供借鉴,并更好地实现地下水资源的可持续发展。

Scientific and reasonable delineation of drinking groundwater consmwation district is helpful in preventing groundwater somve from being polluted with the lowest costs. The city of Hohhot in Inner Mongolia is taken as an example in this paper. On the basis of analyzing the hydrogeological conditions of the study are, the groundwater seepage field is simulated by using MODFLOW and the particle reverse tracer simulation is carried out by using MODPATH. The range of primary and secondary conservation districts is determined with the particle tracing range of 100 d and 1 000 d. Based the featres of groundwater somves, the management measres for groundwater protection area are proposed. Furthemore, reasonable suggestions of groundwater protection from both engineering technology and socio-economic sides are also put forward. The results provide references for the development trend and research direction of delineation methods of groundwater protection areas, and are helpful in realizing the sustainable development of groundwater resources.