Anthropogenic impacts on suspended sediment load in the Upper Yangtze river
文献类型：期刊论文
| 作者 | Wei, Jie1; He, Xiubin2 ; Bao, Yuhai2
|
| 刊名 | REGIONAL ENVIRONMENTAL CHANGE
 |
| 出版日期 | 2011-12-01 |
| 卷号 | 11期号:4页码:857-868 |
| 关键词 | Anthropogenic impact Catchment erosion Rainfall erosivity Riverine sediment The Upper Yangtze river |
| ISSN号 | 1436-3798 |
| 通讯作者 | Wei Jie（韦杰） |
| 英文摘要 | Climate change and human disturbance drive catchment erosion and increase riverine sediment load sensitively in small and medium-sized watersheds. This is not always true in large basins, where aggregation and buffering effects have dampen the ability to determine the driving forces of sedimentation. Even though there are significant responses to sedimentation in large river basins, it is difficult to get a precise quantitative assessment of specific drivers. This paper develops a methodology to identify driving forces that change suspended sediment load in the Upper Yangtze river. Annual runoff and sediment load data from 1954 to 2005 at the Yichang gauging station in the Upper Yangtze basin, daily precipitation data from 60 meteorological stations, and survey data on reservoir sediment were collected for the study. Sediment load/rainfall erosivity (S/R), is a new proxy indicator introduced to reflect human activities. Since the mid-1980s, S/R in the Upper Yangtze has dramatically declined from 0.21 to 0.03 (x10(10) t ha h MJ(-1) mm(-1)), indicating that human activity has played a key role in the decline of the suspended sediment load. Before the mid-1980s, a higher average S/R is attributed to large-scale deforestation and land reclamation. A significant sediment decrease occurred from 1959 to 1961 during an extreme drought condition, and an increase in sedimentation in 1998 coincided with an extreme flood event, which was well recorded in the S/R curve. This indicates that the S/R proxy is able to distinguish anthropogenic from climate impacts on suspended sediment load, but is not necessarily indicatory in extreme climate events. In addition, typical drivers of riverine sediment load variation including soil conservation projects, reservoirs construction, and land use/cover change are discussed. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| 类目[WOS] | Environmental Sciences ; Environmental Studies |
| 研究领域[WOS] | Environmental Sciences & Ecology |
| 关键词[WOS] | RAINFALL EROSIVITY ; R-FACTOR ; LOESS PLATEAU ; WORLDS RIVERS ; SOIL-EROSION ; YELLOW-RIVER ; CHINA ; LAND ; YIELD ; FLUX |
| 收录类别 | SCI ; SSCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000298226500010 |
| 公开日期 | 2012-12-18 |
| 源URL | [http://192.168.143.20:8080/handle/131551/4590]  |
| 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 |
| 作者单位 | 1.Chongqing Normal Univ, Geog & Tourism Coll, Chongqing 400047, Peoples R China 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wei, Jie,He, Xiubin,Bao, Yuhai. Anthropogenic impacts on suspended sediment load in the Upper Yangtze river[J]. REGIONAL ENVIRONMENTAL CHANGE,2011,11(4):857-868. |
| APA | Wei, Jie,He, Xiubin,&Bao, Yuhai.(2011).Anthropogenic impacts on suspended sediment load in the Upper Yangtze river.REGIONAL ENVIRONMENTAL CHANGE,11(4),857-868. |
| MLA | Wei, Jie,et al."Anthropogenic impacts on suspended sediment load in the Upper Yangtze river".REGIONAL ENVIRONMENTAL CHANGE 11.4(2011):857-868. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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