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Title: Assessing slope forest effect on flood process caused by a short-duration storm in a small catchment
Authors: Hou, Jingming
Guo, Kaihua
Liu, Feifei
Han, Hao
Liang, Qiuhua
Tong, Yu
Li, Peng
Keywords: Flood
Land use
Vegetation
Catchment
Channel slope
Side slope
Issue Date: 2018
Publisher: MDPI AG © The authors
Citation: HOU, J. ... et al, 2018. Assessing slope forest effect on flood process caused by a short-duration storm in a small catchment. Water, 10 (9), 1256.
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.
Description: This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Sponsor: This work is partly supported by the National Key Research Program of China (2016YFC0402704); National Natural Science Foundation of China (19672016); State Key Program of National Natural Science Foundation of China (Grant No. 41330858) and the UK Natural Environment Research Council (NERC) (Grant No. NE/K008781/1).
Version: Published
DOI: 10.3390/w10091256
URI: https://dspace.lboro.ac.uk/2134/36574
Publisher Link: https://doi.org/10.3390/w10091256
Appears in Collections:Published Articles (Architecture, Building and Civil Engineering)

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