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摘要: 文章在分析渗流井井流特征的基础上,通过引入等效渗透系数,构建渗流井取水的"渗流—管流"耦合模型,建立了渗流井取水的数学模型,提出了渗流井取水计算模型。以陕西省悖牛川水源地为例,通过水文地质条件的分析,提出悖牛川陕西段河谷区地下水渗流井的开采方式。结合具体的水文地质结构及有关参数,采用地下水流三维有限差分法计算了各渗流井的出水量及其组成。在考虑河流持续断流45d的情况下,计算了断流条件下渗流井出水量的衰减过程,在此基础上,确定了悖牛川陕西段河谷区地下水渗流井开采方式新增允许开采量。
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关键词:
- 渗流井 /
- 等效渗透系数 /
- “渗流—管流”耦合模型 /
- 允许开采量
Abstract: Based on the analysis of the flow characteristics of seepage wells,a mathematic model was developed by adapting the equivalent hydraulic conductivity and the model of coupled seepage and pipe flow for a seepage well.Through the analysis of the hydrogeological conditions,the manner of seepage wells was proposed to develop groundwater in the river valley of Boniuchuan,Shaanxi.Combining the specific hydrogeological structure and related parameters,the pumpage and its composition were calculated by a three-dimensional finite difference method.Considering the 45-days’ zero-flow of the river,the pumpage attenuation of seepage wells was calculated.The newly added reasonable yield was also proposed. -
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