新蔡县城市应急水源地评价

estimate of urban emergency water source in xincai county

新蔡县城市应急水源地是新蔡县城市地质调查的重要组成部分,对提高新蔡县在特枯年、连续干旱年以及水污染事件突发时的危机应对能力发挥重要作用。本文选取应急水源地为研究区,通过分析水源地的水文地质条件,评价水源地地下水开发保障能力。研究表明,水源地中深层地下水丰富,水质良好;经计算求得可开采量为1. 78×10^4m^3/d;规划开采井9眼,东西向分二排布设,梅花状交错分布,井深为300 m,单井出水量1 800 m^3/d,总开采量为1. 62×10^4m^3/d;水源地以1. 62×10^4m^3/d的开采量开采中深层地下水,100 d后水位下降速度迅速减小,400 d时水位下降速率0. 005 m/a,趋于稳定,水源地的开采量在设计的开采年限内有保障。

In urban emergency water source of xincai county is an important part of the urban geological survey of xincai county,which plays an important role in improving the crisis response ability of xincai county in the case of drought and water pollution incidents.In this paper,the emergency water source is selected as the research area,and the groundwater development capacity of the water source is evaluated by analyzing the hydrogeological conditions of the water source.The research shows that the deep groundwater is abundant and the water quality is good;By calculation,the recoverable amount is 1.78×10^4 m^3/d;Nine Wells are planned for production,with two rows in the east-west direction and interlaced distribution in the form of plum blossoms.The depth of the well is 300 m,the water output of a single well is 1800 m^3/d,and the total production is 1.62×10^4 m^3/d;In the water source area,1.62×10^4 m^3/d is used to extract the deep groundwater.After 100d,the water level decreases rapidly,and at 400 d,the water level decreases at 0.005 m/a,which tends to be stable.The amount of water source area is guaranteed within the designed mining life.