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The Exact Groundwater Divide on Water Table between Two Rivers: A Fundamental Model Investigation

Ministry of Education Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences, Beijing 100083, China
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Water 2019, 11(4), 685; https://doi.org/10.3390/w11040685
Received: 13 March 2019 / Revised: 29 March 2019 / Accepted: 1 April 2019 / Published: 2 April 2019
(This article belongs to the Section Hydrology and Hydrogeology)
The groundwater divide within a plane has long been delineated as a water table ridge composed of the local top points of a water table. This definition has not been examined well for river basins. We developed a fundamental model of a two-dimensional unsaturated–saturated flow in a profile between two rivers. The exact groundwater divide can be identified from the boundary between two local flow systems and compared with the top of a water table. It is closer to the river of a higher water level than the top of a water table. The catchment area would be overestimated (up to ~50%) for a high river and underestimated (up to ~15%) for a low river by using the top of the water table. Furthermore, a pass-through flow from one river to another would be developed below two local flow systems when the groundwater divide is significantly close to a high river. View Full-Text
Keywords: groundwater divide; water table; unsaturated–saturated flow; catchment area; pass-through flow groundwater divide; water table; unsaturated–saturated flow; catchment area; pass-through flow
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MDPI and ACS Style

Han, P.-F.; Wang, X.-S.; Wan, L.; Jiang, X.-W.; Hu, F.-S. The Exact Groundwater Divide on Water Table between Two Rivers: A Fundamental Model Investigation. Water 2019, 11, 685.

AMA Style

Han P-F, Wang X-S, Wan L, Jiang X-W, Hu F-S. The Exact Groundwater Divide on Water Table between Two Rivers: A Fundamental Model Investigation. Water. 2019; 11(4):685.

Chicago/Turabian Style

Han, Peng-Fei; Wang, Xu-Sheng; Wan, Li; Jiang, Xiao-Wei; Hu, Fu-Sheng. 2019. "The Exact Groundwater Divide on Water Table between Two Rivers: A Fundamental Model Investigation" Water 11, no. 4: 685.

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