Evolution of Surface Drainage Network for Spoil Heaps under Simulated Rainfall

doi:10.3390/w13233475

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部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

	Evolution of Surface Drainage Network for Spoil Heaps under Simulated Rainfall
	Chen, Dongkai 1; Lv, Jiaorong 2; Luo, Han 1; Xie, Yongsheng 1
刊名	WATER
	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
DOI	10.3390/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.
资助项目	Natural Science Foundation of China[41601300]
WOS关键词	SOIL-EROSION MODEL ; WATER EROSION ; ROCK FRAGMENTS ; LOESS PLATEAU ; RUNOFF ; ROUGHNESS ; SEDIMENT ; SLOPES ; FLOW ; CONNECTIVITY
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
语种	英语
出版者	MDPI
WOS记录号	WOS:000734612600001
资助机构	Natural Science Foundation of China
内容类型	期刊论文
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.