息县拟建城北水源地地下水开采潜力分析

Analysis on the potential of groundwater extraction in the proposed north water source area of Xi xian

息县拟建城北水源地井位布设在罗淮路以北小李庄~大李庄一带。中深层地下水开采采用双排布井方案,共布设12眼开采井,井间距500 m,排间距840 m,单井出水量1 920 m^(3)/d左右,井径为Ф377 mm。应用解析法和均衡法对拟建水源地地下水资源量变化进行了评价,并对水源地的开采潜力进行了分析。研究结果表明,采用解析法计算,按拟定的开采方案,水源地允许开采量为2.112×10~4 m^(3)/d,开采20 a后,中心井(K04)井壁动水位埋深53.17 m。采用均衡法计算,地下水允许开采量22 541.1 m^(3)/d。通过以上两种方法计算,结果较为接近。因此,拟建城北水源地范围地下水允许开采量2.0×10~4 m^(3)/d是有保证的。

The planned water source well in the north of Xixian County is located in the area from Xiaolizhuang to Dalizhuang north of Luohuai Road.The double row well layout scheme is adopted for the exploitation of medium and deep groundwater,with a total of 12 open-pit wells arranged with a spacing of 500m and 840m between rows.The water output of a single well is about 1 920 m~3/d,and the well diameter is Ф 377mm.The analytical and equilibrium methods were applied to evaluate the changes in groundwater resources in the proposed water source area,and the mining potential of the water source area was analyzed.The research results show that the allowable mining output of the water source area is 2.112×10~4 m~3/d,according to the proposed exploitation plan by using the analytical method,after 20 years of mining,the dynamic water level burial depth of the central well(K04) wall is 53.17 m.Equilibrium method is adopted for calculation,and the allowable mining output of groundwater is 22 541.1 m~3/d.The results obtained through the above two methods are relatively close.Therefore,the allowable mining output of groundwater in the proposed north water source area is 2.0×10~4 m~3/d is guaranteed.