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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50197

Title: A preliminary study of interaction between surface water and groundwater using GSFLOW
Authors: Yeh, C.K.
Y.C. Chiu
Contributors: 國立臺灣海洋大學:應用地球科學研究所
Date: 2017-12
Issue Date: 2018-09-20T03:31:55Z
Publisher: Taiwan Water Conservancy
Abstract: Abstract: The scarcity of water resources has become an important global issue, the conjunctive use of surface water (SW) and groundwater (GW) is adopted as a superior strategy to solve this crisis. However, the interaction of SW and GW is very complicated, the detail and comprehensive analyses on the processes of interactions are essential to provide effective practices for the water resources management. Accordingly, a new coupled SW and GW numerical model, GSFLOW, is selected to simulate the interactions of SW and GW in this study. GSFLOW is developed by U.S. Geological Survey (USGS) based on the integration of the Precipitation-Runoff Modeling System (PRMS) and USGS Groundwater Flow Model (MODFLOW). One-dimensional Richards' equation used to simulate the vertical flow in the unsaturated zone is applied to link the PRMS and MODFLOW. A synthetic case is investigated to demonstrate GSFLOW's capability of handling the entire hydrological cycle and its adequacy of implementing in Taiwan. The simulated results show that stream stages, streamflows, and groundwater levels can be directly outputted and the water budget of entire SW and GW system can also be obtained. The change of water storage in each subsystem, water fluxes between each subsystem, and the water content in the unsaturated zone can be acquired through further analyzing of simulated results. The effects of interactions between SW and GW on the hydrological processes can be evaluated through simulations as well. Based on the synthetic case showed in this study, the advantages of accuracy, efficiency, and capability when using GSFLOW is confirmed. If GSFLOW can be applied to the watersheds in Taiwan in the near future, and extended its application on the conjunctive management of SW and GW, a more effective strategy for water resources management can be provided and the impact of water shortage can be mitigated. GSFLOW can be recognized as a reference tool and used to facilitate the ability of water resources planning and management in Taiwan.
Relation: 65(4) pp.19-41
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/50197
Appears in Collections:[應用地球科學研究所] 期刊論文

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