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Water 2018, 10(9), 1256; https://doi.org/10.3390/w10091256

Assessing Slope Forest Effect on Flood Process Caused by a Short-Duration Storm in a Small Catchment

1
State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi’an University of Technology, Xi’an 710048, China
2
School of Engineering, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
*
Author to whom correspondence should be addressed.
Received: 10 June 2018 / Revised: 18 July 2018 / Accepted: 6 September 2018 / Published: 15 September 2018
(This article belongs to the Section Water Resources Management and Governance)
Full-Text   |   PDF [18802 KB, uploaded 18 September 2018]   |  

Abstract

Land use has significant impact on the hydrologic and hydraulic processes in a catchment. This work applies a hydrodynamic based numerical model to quantitatively investigate the land use effect on the flood patterns under various rainfall and terrain conditions in an ideal V-shaped catchment and a realistic catchment, indicating the land use could considerably affect the rainfall-flood process and such effect varies with the catchment terrain, land use scenario and the rainfall events. The rainfall-flood process is less sensitive for the side slope than the channel slope. For a channel slope lower than the critical value in this work, the forest located in the middle of the catchment slope could most effectively attenuate the flood peak. When the channel slope is higher than the critical one, forest located in the downstream of the catchment could most significantly mitigate the peak discharge. Moreover, the attenuation effect becomes more obvious as the rainfall becomes heavier. The fragmentation of vegetation does not reduce the flood peak in a more obvious way, compared with the integral vegetation patterns with the same area proportion. The research can help more reasonably guide the land use plan related to flood risk. View Full-Text
Keywords: flood; land use; vegetation; catchment; channel slope; side slope flood; land use; vegetation; catchment; channel slope; side slope
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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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Hou, J.; Guo, K.; Liu, F.; Han, H.; Liang, Q.; Tong, Y.; Li, P. Assessing Slope Forest Effect on Flood Process Caused by a Short-Duration Storm in a Small Catchment. Water 2018, 10, 1256.

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