IMHE OpenIR  > 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, Yoshitaka1; Kato, Hiroaki2; Zhu, Bo3; Wang, Tao3; Yang, Fan1; Rakwal, Randeep4; Onda, Yuichi2
2018-04-01
Source PublicationJOURNAL OF MOUNTAIN SCIENCE
ISSN1672-6316
Volume15Issue:4Pages:738-751
AbstractPurple 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.
KeywordSurface runoff Slope gradient Natural rainfall Purple soil Runoff plot
DOI10.1007/s11629-017-4714-3
WOS KeywordINTERRILL EROSION ; OVERLAND-FLOW ; SEDIMENT TRANSPORT ; SOUTHWESTERN CHINA ; LOESSIAL HILLSLOPE ; VEGETATION COVER ; SPLASH EROSION ; SICHUAN BASIN ; STEEP SLOPES ; SURFACE
Language英语
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000429949900006
PublisherSCIENCE PRESS
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/21491
Collection山地表生过程与生态调控重点实验室
Corresponding AuthorKomatsu, Yoshitaka
Affiliation1.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
Recommended Citation
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.
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