西安市涝渭应急水源地模拟研究

Simulation of emergency water source area in Laowei Xi′an

为提高西安城市供水能力以及供水系统应对风险的能力,建设应急水源地是保证西安市城市供水较为现实的选择之一。将研究区的地下水划分为第四系松散岩类孔隙潜水和第四系松散岩类孔隙承压水,在现状开采情况下建立潜水二维非稳定流数学模型以及浅层承压水二维非稳定流数学模型,利用两组潜水抽水孔进行了两组干扰抽水试验,并采用这两组抽水试验资料进行模型的校正与验证;通过模型计算出潜水、浅层承压水的不同井间距、不同开采量的最大降深值,进而设计了最佳开采布井方案。通过勘察和取水方案初步设计,结合潜水井与浅层承压水井共同开采区内地下水;采用单排管井取水方式开采,布设32眼潜水井,12眼承压水井,开采区总可开采量为100800m^3/d(4200m^3/h)。

In order to improve the ability of Xi′an city water supply and water supply system to cope with the risks,according to the current situation of water resources in Xi′an City,the construction of emergency water supply is one of the more realistic options to ensure the urban water supply in Xi′an.The groundwater divide study area of the Quaternary unconsolidated rock pore water and Quaternary unconsolidated rock pore confined water in the current mining mathematical model of unsteady flow and shallow confined water of two-dimensional unsteady flow mathematical model is established for diving 2D case,pumping hole are two group interference pumping test with two groups of diving,and using this two sets of pumping test data of calibration and verification of the model;through the model to calculate the maximum drop of diving,shallow confined water of different Ima,different exploitation of deep value,and then designed the optimal mining wells scheme.Through the investigation and preliminary design of water,combined with the diving well and shallow artesian well common exploitation groundwater;the single row tube well water mining,arrangement of 32 eyes of 12 eyes of potential wells,artesian well,mining district total recoverable amount is 100 800 m^3/d(4 200 m^3/h).