Effects of slope gradient on runoff from bare-fallow purple soil in China under natural rainfall conditions

doi:10.1007/s11629-017-4714-3

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

	Effects of slope gradient on runoff from bare-fallow purple soil in China under natural rainfall conditions
	Komatsu, Yoshitaka 1; Kato, Hiroaki 2; Zhu, Bo3 ; Wang, Tao 3; Yang, Fan 1; Rakwal, Randeep 4; Onda, Yuichi 2
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2018-04-01
卷号	15 期号:4 页码:738-751
关键词	Surface runoff Slope gradient Natural rainfall Purple soil Runoff plot
ISSN号	1672-6316
DOI	10.1007/s11629-017-4714-3
英文摘要	Purple soil is highly susceptible for overland flow and surface erosion, therefore understanding surface runoff and soil erosion processes in the purple soil region are important to mitigate flooding and erosion hazards. Slope angle is an important parameter that affects the magnitude of runoff and thus surface erosion in hilly landscapes or bare land area. However, the effect of slope on runoff generation remains unclear in many different soils including Chinese purple soil. The aim of this study was to investigate the relationship between different slope gradients and surface runoff for bare-fallow purple soil, using 5 m x 1.5 m experimental plots under natural rainfall conditions. Four experimental plots (10A degrees, 16A degrees, 20A degrees and 26A degrees) were established in the Yanting Agro-ecological Experimental Station of Chinese Academy of Science in central Sichuan Basin. The plot was equipped with water storage tank to monitor water level change. Field monitoring from July 1 to October 31, 2012 observed 42 rainfall events which produced surface runoff from the experimental plots. These water level changes were converted to runoff. The representative eight rainfall events were selected for further analysis, the relationship between slope and runoff coefficient were determined using ANOVA, F-test, and z-score analysis. The results indicated a strong correlation between rainfall and runoff in cumulative amount basis. The mean value of the measured runoff coefficient for four experimental plots was around 0.1. However, no statistically significant relationship was found between slope and runoff coefficient. We reviewed the relationship between slope and runoff in many previous studies and calculated z-score to compare with our experimental results. The results of z-score analysis indicated that both positive and negative effects of slope on runoff coefficient were obtained, however a moderate gradient (16A degrees-20A degrees in this study) could be a threshold of runoff generation for many different soils including the Chinese purple soil.
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000429949900006
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/21491]
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	Komatsu, Yoshitaka
作者单位	1.Univ Tsukuba, Grad Sch Life & Environm Sci, 1-1-1 Tennodai, Tsukuba, Ibaraki 3058572, Japan 2.Univ Tsukuba, Ctr Res Isotopes & Environm Dynam, 1-1-1 Tennodai, Tsukuba, Ibaraki 3058572, Japan 3.Chinese Acad Sci, Inst Mt Hazards & Environm, 9,Block 4,Renminnan Rd, Chengdu 610041, Peoples R China 4.Univ Tsukuba, Fac Hlth & Sport Sci, 1-1-1 Tennodai, Tsukuba, Ibaraki 3058574, Japan
推荐引用方式 GB/T 7714	Komatsu, Yoshitaka,Kato, Hiroaki,Zhu, Bo,et al. Effects of slope gradient on runoff from bare-fallow purple soil in China under natural rainfall conditions[J]. JOURNAL OF MOUNTAIN SCIENCE,2018,15(4):738-751.
APA	Komatsu, Yoshitaka.,Kato, Hiroaki.,Zhu, Bo.,Wang, Tao.,Yang, Fan.,...&Onda, Yuichi.(2018).Effects of slope gradient on runoff from bare-fallow purple soil in China under natural rainfall conditions.JOURNAL OF MOUNTAIN SCIENCE,15(4),738-751.
MLA	Komatsu, Yoshitaka,et al."Effects of slope gradient on runoff from bare-fallow purple soil in China under natural rainfall conditions".JOURNAL OF MOUNTAIN SCIENCE 15.4(2018):738-751.