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  2. 成都山地灾害与环境研究所
  3. 中国科学院水利部成都山地灾害与环境研究所
  4. 山地表生过程与生态调控重点实验室
Evolution of Surface Drainage Network for Spoil Heaps under Simulated Rainfall

文献类型：期刊论文

作者Chen, Dongkai1; Lv, Jiaorong2; Luo, Han1; Xie, Yongsheng1
刊名WATER
出版日期2021-12-01
卷号13期号:23页码:16
关键词spoil heap flow paths roughness simulated rainfall fractal dimensions
ISSN号无
DOI10.3390/w13233475
英文摘要Spoil heaps laid from the infrastructure building sites or the mining sites are confoundedly prone to accelerated soil erosion and inducing debris flows on extreme rainfall occasion, thus threatening water quality and personal safety. In present study, the roughness and drainage network evolution of the loess spoil heap (a 33 degrees slope gradient) were investigated via indoor simulation experiment under three rainfall intensities (60, 90, and 120 mm/h). A detailed scan of the slope using laser scanner, topographic analysis based on ArcGIS software, and statistical analyses were the main methods utilized in the study. The results showed that surface roughness increased with cumulative rainfall. For three rainfall intensity treatments, the proneness of shallow landslide under 90 mm/h intensity resulted in the largest roughness. The drainage density and stream frequency of the spoil heap slope both decreased with cumulative rainfall and negatively correlated with surface roughness, which indicated the convergence of the drainage network. Meanwhile, the individual flow paths presented an increasing sinuosity and a decreasing gradient with cumulative rainfall. However, drainage network features varied in a less marked degree during different rainfall intensities, showing comparable fractal dimensions of 1.350-1.454, 1.305-1.459, and 1.292-1.455 for the three rainfall intensities. Evaluating the response of four hydrodynamic characteristics of runoff to the drainage network evolution, stream power was found to be most sensitive. The linearity of the relationships between stream power and drainage density and that between stream sinuosity and gradient were estimated to have R-2 between 0.961 and 0.979.
WOS关键词SOIL-EROSION MODEL ; WATER EROSION ; ROCK FRAGMENTS ; LOESS PLATEAU ; RUNOFF ; ROUGHNESS ; SEDIMENT ; SLOPES ; FLOW ; CONNECTIVITY
资助项目Natural Science Foundation of China[41601300]
WOS研究方向Environmental Sciences & Ecology ; Water Resources
语种英语
WOS记录号WOS:000734612600001
出版者MDPI
资助机构Natural Science Foundation of China
源URL[http://ir.imde.ac.cn/handle/131551/56380]  
专题成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
通讯作者Lv, Jiaorong; Luo, Han
作者单位1.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
2.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610000, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Dongkai,Lv, Jiaorong,Luo, Han,et al. Evolution of Surface Drainage Network for Spoil Heaps under Simulated Rainfall[J]. WATER,2021,13(23):16.
APA Chen, Dongkai,Lv, Jiaorong,Luo, Han,&Xie, Yongsheng.(2021).Evolution of Surface Drainage Network for Spoil Heaps under Simulated Rainfall.WATER,13(23),16.
MLA Chen, Dongkai,et al."Evolution of Surface Drainage Network for Spoil Heaps under Simulated Rainfall".WATER 13.23(2021):16.

入库方式： OAI收割

来源：成都山地灾害与环境研究所

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