Determination of erosive events in the Chinese Loess Plateau using the runoff threshold
文献类型：期刊论文
| 作者 | Zheng, Mingguo1; Cheng, Weiming2 |
| 刊名 | JOURNAL OF SOILS AND SEDIMENTS
 |
| 出版日期 | 2017-04-01 |
| 卷号 | 17期号:4页码:1182-1190 |
| ISSN号 | 1439-0108 |
| 关键词 | Erosion Loess Plateau Rainfall erosivity Threshold of erosive rainfalls |
| DOI | 10.1007/s11368-016-1598-8 |
| 通讯作者 | Zheng, Mingguo(zhengmg.04b@igsnrr.ac.cn) |
| 英文摘要 | Exclusion of non-erosive rainfalls is highly desirable in calculating the rainfall erosivity. It is common practice to use a rainfall threshold to separate erosive from non-erosive events. This study aims to determine erosive events in the Chinese Loess Plateau using the runoff threshold. The data used mainly include h (runoff depth; total runoff volume normalized to drainage area) and specific sediment yield (SSY) of 1475 storm events observed at three scales of hillslope, subwatershed, and watershed. The linear h-SSY relationships (SSY = bh + a) were established. The x-intercept term (-a/b) was interpreted to be the h threshold between erosive and non-erosive events. The t test was used to test whether the constant term a is statistically zero or not. The t tests demonstrated that the h-SSY relationship was proportional on upland slopes, but linear with a positive x-intercept in subwatersheds and watersheds. Accordingly, the h threshold of erosive events varied from zero on upland slopes, implying that any runoff event is erosive, to a positive value in subwatersheds and watersheds. The positive h threshold can be related to the preferential generation of runoff on the bedrock channel at the subwatershed scale and to the base flow at the watershed scale. Using the h threshold can remove approximately 85% of rainfall events from the calculation of rainfall erosivity. The h threshold not only is equally effective as the rainfall threshold in removing non-erosive events but also allows a more accurate estimation of rainfall erosivity. |
| WOS关键词 | FLOW-SEDIMENT RELATIONSHIP ; HILLY AREAS ; WATERSHEDS ; SCALES ; YIELD |
| 资助项目 | National Mountain Flood Disaster Investigation Project[SHZH-IWHR-57] ; National Natural Science Foundation of China[41230746] ; National Natural Science Foundation of China[41271306] |
| WOS研究方向 | Environmental Sciences & Ecology ; Agriculture |
| 语种 | 英语 |
| 出版者 | SPRINGER HEIDELBERG |
| WOS记录号 | WOS:000398780500026 |
| 资助机构 | National Mountain Flood Disaster Investigation Project ; National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/64581]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Zheng, Mingguo |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zheng, Mingguo,Cheng, Weiming. Determination of erosive events in the Chinese Loess Plateau using the runoff threshold[J]. JOURNAL OF SOILS AND SEDIMENTS,2017,17(4):1182-1190. |
| APA | Zheng, Mingguo,&Cheng, Weiming.(2017).Determination of erosive events in the Chinese Loess Plateau using the runoff threshold.JOURNAL OF SOILS AND SEDIMENTS,17(4),1182-1190. |
| MLA | Zheng, Mingguo,et al."Determination of erosive events in the Chinese Loess Plateau using the runoff threshold".JOURNAL OF SOILS AND SEDIMENTS 17.4(2017):1182-1190. |
入库方式： OAI收割
来源：地理科学与资源研究所
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。