陕北风沙滩地区生态安全地下水位埋深研究

在野外调查和综合分析的基础上,从可持续发展角度提出了生态安全地下水位埋深的概念;并深入探讨了地下水位埋深与植被生长、河湖基流量及土地荒漠化的关系,确定了风沙滩地区生态安全地下水位埋深为1.5~5 m;采用面向生态的区域地下水资源评价理论,以生态安全地下水位埋深为约束,计算出该区地下水可采资源量约为107万m3/d。

Research on buried depth of eco-safety about groundwater table in the blown-sand region of the Northern Shaanxi Province

On the basis of field investigation and synthetic analysis,a notion of buried depth of eco-safety on groundwater table was put forth from the point of sustainable development.The relation between buried depth of groundwater table and vegetation growing,and rivers and lakes,and land desertification was discussed,and then range of buried depth of eco-safety on groundwater table,1.5-5 meters,was determined in the blown-sand region of northern Shaanxi Province.Moreover by ecology-oriented regional groundwater resource assessment theory,taking the range of buried depth as a constraint,the allowable withdrawal of groundwater,107×10⁴ m³/d,was estimated in the region.