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Magnitude of soil erosion in small catchments with different land use patterns under an extreme rainstorm event over the Northern Loess Plateau, China

文献类型：期刊论文

作者Wang, Nan1,4; Jiao, Juying1,2,3; Bai, Leichao3; Zhang, Yifeng3; Chen, Yixian1,4; Tang, Bingzhe3; Liang, Yue1,4; Zhao, Chunjing3; Wang, Haolin3
刊名CATENA
出版日期2020-12-01
卷号195页码:10
关键词Extreme rainstorm Dam-controlled catchment Soil erosion Land use distribution pattern
ISSN号0341-8162
DOI10.1016/j.catena.2020.104780
通讯作者Jiao, Juying(jyjiao@ms.iswc.ac.cn)
英文摘要Characteristics of soil erosion under extreme rainfall conditions are indicators of the ecological restoration measures as well as the rationality of land use patterns in the region. To this end, 12 dam-controlled catchments were selected for investigation after an extreme rainstorm event in the northern Shaanxi Province on 25-26 July 2017 (known as the "7.26" rainstorm). Soil erosion intensities in the 12 catchments were obtained by excavations of sedimentation profiles and sedimentation area measurements. Digital orthophoto maps and digital terrain models by unmanned aerial vehicle were generated to characterise land use types and areas, slope gradients, and the distance from the land to the boundary of dam-land along the flow accumulation path. Stepwise regression analysis was used to determine the main factors affecting catchment erosion intensity. Results showed that the average sedimentation thickness and overall soil erosion intensity across the 12 catchments ranged from 0.16 to 1.67 m and 10295-49227 t km(-2), respectively. Soil erosion caused by the extreme rainstorm was 10-50 times of the soil loss tolerance on the Loess Plateau (1000 t km(-2) year(-1)). Stepwise regression analysis revealed that the more similar the shape of a catchment to a circle, the closer the distance between the slope-cropland and dam-land, the larger the erosion modulus within the catchment. Furthermore, the presence of a cement road along the valley shoulder greatly reduced the modulus of soil erosion. These findings indicate that the existing ecological conditions in the dam-controlled catchments were not able to effectively resist erosion under the extreme rainfall conditions of this event. Thus, optimising the distribution of land use types within catchments should be a focus for soil erosion control.
WOS关键词OPTIMIZATION MODEL ; SEDIMENT YIELD ; COVER ; ALLOCATION ; RUNOFF ; GREEN ; BASIN ; GRAIN
资助项目National Key Research and Development Program of China[2016YFC0501604] ; Open Project Fund of Key Laboratory of the Loess Plateau Soil Erosion and Water Loss Process and Control, Ministry of Water Resources[2019001]
WOS研究方向Geology ; Agriculture ; Water Resources
语种英语
WOS记录号WOS:000580366300031
出版者ELSEVIER
资助机构National Key Research and Development Program of China ; Open Project Fund of Key Laboratory of the Loess Plateau Soil Erosion and Water Loss Process and Control, Ministry of Water Resources
源URL[http://ir.igsnrr.ac.cn/handle/311030/156549]  
专题中国科学院地理科学与资源研究所
通讯作者Jiao, Juying
作者单位1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
2.Minist Water Resources, Key Lab Loess Plateau Soil Eros & Water Loss Proc, Zhengzhou 450003, Henan, Peoples R China
3.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Nan,Jiao, Juying,Bai, Leichao,et al. Magnitude of soil erosion in small catchments with different land use patterns under an extreme rainstorm event over the Northern Loess Plateau, China[J]. CATENA,2020,195:10.
APA Wang, Nan.,Jiao, Juying.,Bai, Leichao.,Zhang, Yifeng.,Chen, Yixian.,...&Wang, Haolin.(2020).Magnitude of soil erosion in small catchments with different land use patterns under an extreme rainstorm event over the Northern Loess Plateau, China.CATENA,195,10.
MLA Wang, Nan,et al."Magnitude of soil erosion in small catchments with different land use patterns under an extreme rainstorm event over the Northern Loess Plateau, China".CATENA 195(2020):10.

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来源：地理科学与资源研究所

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