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Water 2017, 9(7), 523; https://doi.org/10.3390/w9070523

Flood Effect on Groundwater Recharge on a Typical Silt Loam Soil

1
China Irrigation and Drainage Development Center, Beijing 210054, China
2
USDA-Agricultural Research Service, Starkville, MS 39762, USA
3
State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, Xinjiang, China
4
The Water Service Bureau of Chaoyang of Beijing City, Beijing 100026, China
*
Author to whom correspondence should be addressed.
Received: 30 March 2017 / Revised: 1 July 2017 / Accepted: 10 July 2017 / Published: 14 July 2017
(This article belongs to the Special Issue Water and Solute Transport in Vadose Zone)
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Abstract

Floods are of great concern as the global climate changes, and investigations of flood water infiltration and groundwater recharge are important for water resource management worldwide, especially under conditions of global climate changes. However, information on the relationship between the flood water and groundwater recharge is limited. The objective of this study was to determine the relationship between the flood water depth and the height of groundwater rise using lysimeters and numerical modeling in the floodplain of the Tarim River in northwestern China. The experimental results suggested that the rise in height of the groundwater table was closely related to the flood water ponding depth, and the groundwater depth decreased quickly after flooding due to the high infiltration rate of water originating at the Tarim River. The water table falling velocity was significantly less than the water table rising velocity. If the initial groundwater table was deeper, the variation in the water table rise depth was smaller and the water table falling velocity was slower. The numerical simulation results showed good agreement with the observed data, with a determination coefficient (R2) of 0.87 and a root mean square error (RMSE) of 63.91 cm. A good relationship (R2 = 0.789) between the initial groundwater table depth (H0), initial soil water content (W0), flood water depth (h), and height of the water table rise (H) was established. Considering that natural and artificial flood frequencies are related to flood time interval (dt), a relationship (R2 = 0.892) was developed between them. These results can enhance the understanding of flood recharge characteristics in the floodplains of inland rivers. View Full-Text
Keywords: arid land; flood; groundwater recharge; inland river; lysimeter arid land; flood; groundwater recharge; inland river; lysimeter
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Zhang, G.; Feng, G.; Li, X.; Xie, C.; Pi, X. Flood Effect on Groundwater Recharge on a Typical Silt Loam Soil. Water 2017, 9, 523.

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