Application of double medium flow model to modeling of karst groundwater flow system
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摘要: 文章采用不稳定层状裂隙水流模型,应用有限元-卷积结合法,模拟了岩溶地下水流动系统。相对于等效多孔介质模型,双重介质模型模拟的水位下降速度更小,达到稳定的时间更长。距抽水井较近的观测孔处,双重介质模型模拟的水位变化过程阶段性较明显,水位变化过程类似于承压含水层-弱透水层的释水过程,裂隙和孔隙基质分别相当于承压含水层和弱透水层。然后讨论了影响裂隙和孔隙基质间水流交换项的因素,分析了孔组抽水后的渗流场特征。
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关键词:
- 岩溶地下水流动系统 /
- 不稳定层状裂隙水流模型 /
- 有限单元-卷积结合法 /
- 水流交换项 /
- 等效多孔介质模型
Abstract: In this paper,an unsteady parallel fracture flow model and a combined finite element-convolution approach are used to simulate and analyze karst groundwater flow systems.Compared with conventional equivalent porous medium model,the water level changes simulated by this double medium flow model are slower and the time of being stable is longer.For the water level simulated by this model,there exist clear water level change stages at the observation well near the pumping wells.The process of water... -
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