摘要
鉴于那陵格勒河流域冲洪积扇前缘绿洲带生态环境系统对地下水的依赖性,建立了那陵格勒河冲洪积扇水文地质概念模型及地下水流运动的数值模拟模型,采用地下水位拟合、泉流量拟合、溢出带位置拟合及地下水均衡等分析了所建模型的合理性与可靠性,并依据含水层厚度分布、渗透系数、导水系数和单井单位降深涌水量圈定那陵格勒河重点开采区,推导出了生态环境退化程度和地下水开采量之间的关系公式,以生态指标和技术经济指标作为地下水开采的限制条件,通过数值法计算得到重点开采区地下水允许开采量。
In the front of the Nalinggele alluvial and flood fan,the oasis area,is intensively dependent on the ecological environment system of groundwater.Therefore,the hydrogeological conceptual model and the numerical simulation model of groundwater movement were established in the Nalinggele alluvial and flood fan.The rationality and reliability of the model was analyzed by fitting the groundwater level,spring discharge and groundwater-overflow areas,and groundwater balance analysis.According to the thickness distribution of unconfined aquifer,permeability coefficient,transmissibility coefficient and the specific deep drawdown capacity of pumping test wells,the essential areas which could exploit groundwater resources were determined.Taking the ecological index and technical and economic index as groundwater exploitation restrictions,a formula was established which making a close link between the extent of ecological degradation and the amount of groundwater exploitation.The allowable yield of groundwater in critical area was caculated by the numerical method.
出处
《水电能源科学》
北大核心
2015年第8期20-24,共5页
Water Resources and Power
基金
柴达木盆地循环经济试验区重点地区水文地质调查项目(1212011121279)
中国地质调查局干旱-半干旱区地下水与生态重点实验室专题项目
