Groundwater Special Vulnerability and Its Assessment in Guanzhong Basin
Groundwater Special Vulnerability and Its Assessment in Guanzhong Basin
复制标题
DOI：
--
复制
发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Yang Xiao-ting
中科院分区：
文献类型：
--
作者：
Yang Xiao-ting
针对关中盆地大面积地下水硝酸盐污染严重、“三氮”污染严重的现状，分析了地下水特殊脆弱性的概念及其影响因素，包括地下水内在因素、人为因素和污染物的特殊性因素，并从这些因素出发，选取了13个参数对地下水特殊脆弱性进行评价，将交通运输与交通运输耦合到特殊脆弱性评价模型中，使过程模型与评价模型耦合，并结合GIS技术，结果表明，地下水受“三氮”污染的地区，渭河中下游冲积平原区、低黄土塬区和渭河南岸西安附近厚度小于20 m的黄土塬区为易污染区，评价结果与2001年地下水氮污染分布的实际情况相吻合，这些地区地下水中硝酸盐含量大面积超标。
The large area nitrate pollution in unconfined water is very serious in Guanzhong basin,and "three nitrogen" is main contaminant,the concept of groundwater special vulnerability and its influence factors such as groundwater intrinsic factor,artificial factor,and specific factor about contaminant were analyzed.From these factors,13 parameters were chosen to assess groundwater special vulnerability.The simulating results of "three nitrogen" transport and transformation were coupled to the special vulnerability evaluation model so that the process models were cupled with evaluation model,together with GIS technology,the special vulnerability of groundwater was evaluated.It is shown that the areas in which groundwater is polluted by "three nitrogen" easily are the alluvial plain which located at middle and lower Weihe River,low loess tableland,and the loess tableland that the thickness is less than 20 m near Xi'an at the south bank of Weihe River.The assessment results are accorded with the actual groundwater nitrogen pollution distribution in the year 2001,the concentration of nitrate in groundwater in these areas have exceed criterion in a large region.