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浙江大学学报(工学版)  2022, Vol. 56 Issue (7): 1385-1393    DOI: 10.3785/j.issn.1008-973X.2022.07.014
土木工程、水利工程、交通工程     
任意多边形网格剖分的潜水层水流模型
高玉龙1,2(),刘志杰3,韩玉2,易树平2,*()
1. 哈尔滨工业大学 环境学院,黑龙江 哈尔滨 150090
2. 南方科技大学 环境科学与工程学院,广东 深圳 518055
3. 深圳市南科环保科技有限公司,广东 深圳 518055
Numerical model for groundwater flow simulation in unconfined aquifer with arbitrary polygon grids
Yu-long GAO1,2(),Zhi-jie LIU3,Yu HAN2,Shu-ping YI2,*()
1. School of Environment, Harbin Institute of Technology, Harbin 150090, China
2. School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China
3. Shenzhen Sustech Environmental Incorporation, Shenzhen 518055, China
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摘要:

为了提高潜水含水层水流数值模型网格剖分的灵活性,利用多点通量近似方法,建立适用于任意多边形网格剖分的潜水层水流数值模型. 通过4个案例验证模型的有效性,将新模型与通用软件MODFLOW的模拟结果进行对比. 结果显示,新模型计算结果与MODFLOW的结果有良好的一致性. 在具有复杂边界形状的案例中,新模型的均方根误差均小于对应的MODFLOW的均方根误差,说明使用任意多边形网格剖分的新模型表现优于MODFLOW模型. 研究结果表明,新模型有潜力应用于具有复杂边界形状的潜水层的水流过程模拟.

关键词: 地下水流模型任意多边形网格有限体积法多点通量近似潜水含水层    
Abstract:

An improved groundwater flow model was developed by using the multipoint flux approximation method in order to improve the flexibility of discretizing aquifers for groundwater flow numerical model in unconfined aquifer. The arbitrary-shaped polygon grids were used to discretize the aquifer. The availability of the new model was verified by comparing the output between our model and MODFLOW in four cases. Results showed that the calculation results of the new model accorded well with the results of MODFLOW model. All the root mean square errors calculated by the new models were smaller than those of MODFLOW models in real watershed cases with complex boundaries, which indicated that the new model performed better than MODFLOW. The research results show that the new model has the potential to simulate groundwater flow processes in the unconfined aquifer with complex boundaries.

Key words: groundwater flow model    arbitrary polygon grid    finite volume scheme    multipoint flux approximation    unconfined aquifer
收稿日期: 2021-08-27 出版日期: 2022-07-26
CLC:  P 641  
基金资助: 国家自然科学基金资助项目(41877193);深圳市高层次人才科研启动经费资助项目(Y01296126)
通讯作者: 易树平     E-mail: gyulong@qq.com;yisp@sustech.edu.cn
作者简介: 高玉龙(1990—)男,博士生,从事地下水模拟的研究. orcid.org/0000-0003-2833-1509. E-mail: gyulong@qq.com
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引用本文:

高玉龙,刘志杰,韩玉,易树平. 任意多边形网格剖分的潜水层水流模型[J]. 浙江大学学报(工学版), 2022, 56(7): 1385-1393.

Yu-long GAO,Zhi-jie LIU,Yu HAN,Shu-ping YI. Numerical model for groundwater flow simulation in unconfined aquifer with arbitrary polygon grids. Journal of ZheJiang University (Engineering Science), 2022, 56(7): 1385-1393.

链接本文:

https://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2022.07.014        https://www.zjujournals.com/eng/CN/Y2022/V56/I7/1385

图 1  顶点A周围的符号
图 2  不规则网格和规则网格剖分含水层
图 3  不同时刻模型模拟结果的对比
图 4  不同时刻下在含水层剖线(x = 75 m)的模拟结果对比
图 5  不同时刻模型模拟结果的对比
图 6  新桥河流域模型的输入
图 7  新模型与MODFLOW模型和参考模拟结果的对比
图 8  不同时刻的模拟结果对比
图 9  平谷盆地模型的输入
图 10  新模型、MODFLOW模型和参考模型模拟结果的对比
图 11  不同时刻的模拟结果对比
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