IMHE OpenIR  > Journal of Mountain Science  > Journal of Mountain Science-2017  > Vol14 No.3
Effects of rainfall regime and its character indices on soil loss at loessial hillslope with ephemeral gully
HAN Yong; ZHENG Fen-li; XU Xi-meng
Corresponding AuthorZHENG Fen-li
2017-03
Source PublicationJournal of Mountain Science
ISSN1672-6316
Volume14Issue:3Pages:527-538
Subtype期刊论文
AbstractUnderstanding the relationship between hillslope soil loss with ephemeral gully and rainfall regime is important for soil loss prediction and erosion control. Based on 12-year field observation data, this paper quantified the rainfall regime impacts on soil loss at loessial hillslope with ephemeral gully. According to three rainfall parameters including precipitation (P), rainfall duration (t), and maximum 30-minute rainfall intensity (I30), 115 rainfall events were classified by using K-mean clustering method and Discriminant Analysis. The results showed that 115 rainfall events could be divided into three rainfall regimes. Rainfall Regime 1 (RR1) had large I30 values with low precipitation and short duration, while the three rainfall parameters of Rainfall Regime 3 (RR3) were inversely different compared with those of RR1; for Rainfall Regime 2 (RR2), the precipitation, duration andI30 values were all between those of RR1 and RR3. Compared with RR2 and RR3, RR1 was the dominant rainfall regime for causing soil loss at the loessial hillslope with ephemeral gully, especially for causing extreme soil loss events. PI30 (Product of P and I30) was selected as the key index of rainfall characteristics to fit soil loss equations. Two sets of linear regression equations between soil loss and PI30 with and without rainfall regime classification were fitted. Compared with the equation without rainfall regime classification, the cross validation results of the equations with rainfall regime classification was satisfactory. These results indicated that rainfall regime classification could not only depict rainfall characteristics precisely, but also improve soil loss equation prediction accuracy at loessial hillslope with ephemeral gully.
KeywordRainfall Regime Soil Loss Rainfall Character Indices Loessial Hillslope Ephemeral Gully
DOI10.1007/s11629-016-3934-2
Indexed BySCI
Language英语
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18439
CollectionJournal of Mountain Science_Journal of Mountain Science-2017_Vol14 No.3
Recommended Citation
GB/T 7714
HAN Yong,ZHENG Fen-li,XU Xi-meng. Effects of rainfall regime and its character indices on soil loss at loessial hillslope with ephemeral gully[J]. Journal of Mountain Science,2017,14(3):527-538.
APA HAN Yong,ZHENG Fen-li,&XU Xi-meng.(2017).Effects of rainfall regime and its character indices on soil loss at loessial hillslope with ephemeral gully.Journal of Mountain Science,14(3),527-538.
MLA HAN Yong,et al."Effects of rainfall regime and its character indices on soil loss at loessial hillslope with ephemeral gully".Journal of Mountain Science 14.3(2017):527-538.
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