Journal
WATER
Volume 11, Issue 6, Pages -Publisher
MDPI
DOI: 10.3390/w11061161
Keywords
check dam; hydrologic response; sediment transport; InHM; Loess Plateau
Categories
Funding
- National Key Research and Development Program of China [2016YFC0402404]
- National Natural Science Foundation of China [51679209, 51379184]
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Check dams are among of the most widespread and effective engineering structures for conserving water and soil in the Loess Plateau since the 1950s, and have significantly modified the local hydrologic responses and landforms. A representative small catchment was chosen as an example to study the influences of check dams. A physics-based distributed model, the Integrated Hydrology Model (InHM), was employed to simulate the impacts of check dam systems considering four scenarios (pre-dam, single-dam, early dam-system, current dam-system). The results showed that check dams significantly alter the water redistribution in the catchment and influence the groundwater table in different periods. It was also shown that gully erosion can be alleviated indirectly due to the formation of the expanding sedimentary areas. The simulated residual deposition heights (Delta h) matched reasonably well with the observed values, demonstrating that physics-based simulation can help to better understand the hydrologic impacts as well as predicting changes in sediment transport caused by check dams in the Loess Plateau.
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