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Application of a Discrete-Continuum Model to Karst Aquifers in North China |
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| Authors: | by Qiang Wu Wanfang Zhou Guoying Pan and Siyuan Ye |
| Institution: | P.E. LaMoreaux &Associates Inc., 106 Administration Road, Ste.4, Oak Ridge, TN 37830;865 4837483;; Institute of Resources &Environment, Henan Polytechnic University, Jiaozuo 454000, Henan Province, China.; Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology, Ministry of Land and Resources, Qingdao, 266071, Shandong Province, China. |
| Abstract: | A generalized discrete-continuum model is developed to simulate ground water flow in the karst aquifers of North China. The model is a hybrid numerical flow model, which takes into account both quick conduit flow and diffusive fissure flow. The conduit flow is represented by a discrete network model, and the fissure flow is modeled by a continuum approach. The developed model strongly emphasizes the function of the conduits in the flow fields. They control the general drainage pattern, as demonstrated in the simulation of a complex karst aquifer in North China. The model reproduces reasonably well the flow field in response to an unanticipated discharge of ground water from the karst aquifer into an underground mine based on the aquifer parameters that are manually calibrated from a multiple-well pumping test. Sensitivity of the model to the aquifer parameters was evaluated in the context of the case study. |
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