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基于数值模拟及可开采系数法的广花盆地地下水可开采量研究
引用本文:李 丹,李志威,张明珠,庞 园.基于数值模拟及可开采系数法的广花盆地地下水可开采量研究[J].水资源与水工程学报,2018,29(5):81-86.
作者姓名:李 丹  李志威  张明珠  庞 园
作者单位:(广州市水务科学研究所, 广东 广州 510220)
基金项目:广东省水利科技创新项目(2015-21);广州市水务科技项目(2016-203);广州市水务科技项目 (PSZX-XSRQDXS-201601)
摘    要:使用数值模拟法(GMS模拟软件)及开采系数法计算广花盆地的可开采量,以合理地评价广花盆地地下水资源及可开采潜力,防止地下水过度开采及由此引发的地质灾害。结果表明:构建的地下水水流三维数值模型可为研究区提供合理的地下水水流模拟结果,在整个模拟期共730 d中,第60、180、540和730 d的标准化残差均方根分别为4. 996%、4. 043%、6. 517%、6. 787%。以可开采水位最大降深5 m作为岩溶含水层抽取水量的约束条件,数值模型计算得到的地下水可开采量为12 997. 78×104m3。采用可开采系数法计算得到的地下水可开采量为14 015. 10×104m3。两种方法的计算结果相对误差为7. 3%,两种方法相互验证,结果较为可靠,最后提出广花盆地应急备用水源地地下水管理目标及措施。

关 键 词:可开采量    数值模拟    可开采系数法    应急备用水源地    岩溶地下水

Research on groundwater allowable exploitation of Guanghua Basin based on numerical modeling and mineable coefficient method
LI Dan,LI Zhiwei,ZHANG Mingzhu,PANG Yuan.Research on groundwater allowable exploitation of Guanghua Basin based on numerical modeling and mineable coefficient method[J].Journal of water resources and water engineering,2018,29(5):81-86.
Authors:LI Dan  LI Zhiwei  ZHANG Mingzhu  PANG Yuan
Abstract:In this paper, we use numerical modeling (Groundwater Modeling System) and mineable coefficient method to calculate the groundwater allowable exploitation amount of Guanghua basin, so as to rationally evaluate and analyze regional groundwater resources and exploitable potential, and to prevent groundwater overexploitation and the resulting geological disasters. The results show that the 3D numerical model of groundwater flow this paper constructed can provide a reasonable groundwater flow simulation result for the study area. In 730 days of the entire simulation period, the root of standardized residuals of 60th, 180th, 540th and 730th days respectively were 4.996%, 4.043%, 6.517% and 6.787%. Taking the maximum depth of water level of 5m as a constraint condition of water extraction in karst aquifers, the groundwater allowable exploitation amount is 12997.78×104m3 by the numerical model calculation. The groundwater allowable exploitation amount in Guanghua basin is 14015.10×104m3 with the method of mineable coefficient method. The relative error of the results calculated by numerical modeling and the mineable coefficient method is 7.3%. The two methods are verified by each other, and the results are reliable. On the basis of the above, the objectives and measures of the groundwater management for the emergency reserve water source of the Guanghua basin are put forward.
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