摘要
针对焉耆盆地大量引用地表水灌溉,造成地下水水位大面积上升,引发严重土壤盐碱化的现实状况,设计了5种增加地下水开采量、减少地表水引水量的方案,并运用数值模拟模型对各方案进行模拟和预测。焉耆盆地合理地下生态水位上限是防止地表土壤盐碱化的地下水水位,埋深为3.2 m;下限是防止地表植被退化的水位,埋深为4.5 m。根据不同开采方案的模型预测结果,结合地下水生态水位,并考虑地表水、地下水的转化关系,确定焉耆盆地不引起地表生态环境退化的地下水可持续开采量为3.8亿m3/a。
As a result of a large quantity of diversion of surface water for irrigation,the groundwater level had risen within a large area in Yanqi basin,which has been resulting in serious soil salinization.For this phenomenon,it selected the scheme of increasing groundwater exploitation as well as decreasing surface water diversion amount.It designed five mining schemes and use numerical simulation model to make simulation and prediction for each scheme subsequently.The reasonable upper limit of ecological groundwater level is the level preventing surface soil salinization,which is 3.2 meter;while the lower limit is the level preventing surface vegetation degradation,which is 4.5 meter.According to the model prediction results of different mining schemes,combine to the ecological groundwater level as well as taking the transform relationship of surface water and groundwater into consideration,finally determines that the sustainable groundwater exploitation amount in Yanqi basin that not leading ecological environment deterioration is 380 million m3/a.
出处
《人民黄河》
CAS
北大核心
2013年第1期57-59,共3页
Yellow River
基金
水利部公益性行业科研专项(200801050)
关键词
水文地质模拟
数值模拟
地下水
可持续开采量
焉耆盆地
hydrogeology simulation
numerical simulation
groundwater
sustainable yield
Yanqi basin
