基于MODFLOW-CFP的贵州大井流域岩溶地下水数值模拟  

Numerical simulation of karst groundwater in Dajing basin of Guizhou Province based on MODFLOW-CFP

作　　者：党志文 邵景力[2] 崔亚莉[2] 李军 宫志强 赵良杰[4] 梁永升 DANG Zhiwen;SHAO Jingli;CUI Yali;LI Jun;GONG Zhiqiang;ZHAO Liangjie;LIANG Yongsheng(Office of Hebei Water Quality Engineering and Comprehensive Utilization of Water Resources,Hebei University of Architecture,Zhangjiakou,Hebei 075000,China;School of Water Resources and Environment,China University of Geosciences,Beijing 430074,China;Hebei Key Laboratory of Geological Resources and Environmental Monitoring and Protection,Hebei Geo-environment Monitoring Institute,Shijiazhuang,Hebei 050022,China;Institute of Karst Geology,CAGS/Key Laboratory of Karst Dynamics,MNR&GZAR,Guilin,Guangxi 541004,China;No.3 Geological Brigade of Hebei Geology and Mineral Exploration Bureau,Zhangjiakou,Hebei 075000,China)

机构地区：[1]河北建筑工程学院,河北省水质工程与水资源综合利用重点实验室,河北张家口075000 [2]中国地质大学水资源与环境学院,北京430074 [3]河北省地质资源环境监测与保护重点实验室,河北省地质环境监测院,河北石家庄050022 [4]中国地质科学院岩溶地质研究所/自然资源部、广西岩溶动力学重点实验室,广西桂林541004 [5]河北省地矿局第三地质大队,河北张家口075000

出　　处：《中国岩溶》2023年第2期266-276,共11页Carsologica Sinica

基　　金：河北省高校基本科研业务费研究(2023JCTD11);红水河上游岩溶流域1∶5万水文地质环境地质调查(DD20190342);广东省地下水资源调查检测评价(0835-210Z22803141)。

摘　　要：贵州大井流域岩溶分布广泛,岩溶水是当地人民生产和生活的主要来源。由于对岩溶水资源的不合理开发利用,水资源短缺现象经常发生。大井流域水文地质条件复杂,管道-多孔介质双重介质特征明显。文章采用MODFLOW-CFP耦合模型对大井流域展开数值模拟,进而掌握大井流域地下水运动规律、准确评价岩溶水资源,促进其合理开发利用。结果表明:大井流域管道与多孔介质交换量为6 719.1 m^(3)·a^(-1),主要集中在上游和中游;总补给水量为10 977.3×10^(4)m^(3)·a^(-1),补给模数为133.495m^(3)·km^(-2)·a^(-1),其中降雨汇入量和降雨入渗量占总补给量的81.35%,而总排泄量为10 813.47×10^(4)m^(3)·a^(-1),主要在地下河出口排泄。China is a country with the most widely distributed karst,and the karst is extensively developed in its southwesten part where 2,836 underground rivers are distributed with about 1,847.8×10^(8) m^(3)·a^(−1) of karst groundwater resources and a total discharge of 479.7×10^(8)m^(3)·a^(−1) in the dry season.These underground rivers become the main water source for people's life as well as the development of industry and agriculture in Southwest China.However,water shortage has often occurred in recent years,due to the unreasonable development and utilization of karst water resources.How to make scientific,reasonable and effective use of karst water resources has become a difficult problem in tackling water resource crisis.In this paper,we have studied the hydrological process and numerical simulation of groundwater in karst areas from the perspective of groundwater science,which is of great significance to the accurate evaluation,and rational development and utilzation of karst water resources.In this study,we take Dajing basin,a typical karst peak-cluster depression area in southern Guizhou Province,as the study area.Water-bearing media in karst areas often include karst pipelines with high permeability and dissolved gaps with low permeability.The flow mechanism of groundwater in these two media is quite different.The groundwater in the gap mainly accords with Darcy’s law and the laminar flow mechanism,while the groundwater in the karst pipeline is mostly in the turbulent state due to the large flow rate.In the actual situation,the two media are independent of each other,but there is an interrelated process of hydraulic exchange on the boundary.Based on this,we adopt MODFLOW-CFP coupling model to carry out a numerical simulation of Dajing basin.MODFLOW-CFP is a dual-system coupling model based on dual structure theory.MODFLOW-CFP model contains three groundwater flow simulation methods.In this study,CFPM1,the most basic model,is adopted.In this pattern,the traditional groundwater flowing model is coupled

关 键 词：大井流域岩溶水 MODFLOW-CFP耦合模型 岩溶管道模拟 

分 类 号：P641.134[天文地球—地质矿产勘探]