Effects of rainfall regime and its character indices on soil loss at loessial hillslope with ephemeral gully
文献类型：期刊论文
| 作者 | HAN Yong; ZHENG Fen-li; XU Xi-meng |
| 刊名 | Journal of Mountain Science
 |
| 出版日期 | 2017-03 |
| 卷号 | 14期号:3页码:527-538 |
| 关键词 | Rainfall Regime Soil Loss Rainfall Character Indices Loessial Hillslope Ephemeral Gully |
| ISSN号 | 1672-6316 |
| DOI | 10.1007/s11629-016-3934-2 |
| 通讯作者 | ZHENG Fen-li |
| 文献子类 | 期刊论文 |
| 英文摘要 | Understanding 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. |
| 语种 | 英语 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/18439]  |
| 专题 | Journal of Mountain Science _Journal of Mountain Science-2017_Vol14 No.3 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。