Interpreting sedimentation dynamics at Longxi catchment in the Three Gorges Area, China, using Cs-137 activity, particle size and rainfall erosivity
文献类型：期刊论文
| 作者 | Gao Jin-zhang1,2 ; Long Yi1; Zhang Xin-bao1; Adrian, Collins L.3; He Xiu-bin1; Zhang Yun-qi4; Shi Zhong-lin1
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| 刊名 | JOURNAL OF MOUNTAIN SCIENCE
 |
| 出版日期 | 2016-05-01 |
| 卷号 | 13期号:5页码:857-869 |
| 关键词 | Sedimentation Cesium-137 Particle size Rainfall erosivity Soil erosion Three Gorges Area |
| ISSN号 | 1672-6316 |
| 通讯作者 | LONG Yi |
| 英文摘要 | Reservoir sedimentation dynamics were interpreted using Cs-137 activity, particle size and rainfall erosivity analysis in conjunction with sediment profile coring. Two sediment cores were retrieved from the Changshou reservoir of Chongqing, which was dammed in 1956 at the outlet of Longxi catchment in the Three Gorges Area using a gravity corer equipped with an acrylic tube with an inner diameter of 6 cm. The extracted cores were sectioned at 2 cm intervals. All sediment core samples were dried, sieved (< 2 mm) and weighed. Cs-137 activity was measured by gamma-ray spectrometry. The particle size of the core samples was measured using laser particle size granulometry. Rainfall erosivity was calculated using daily rainfall data from meteorological records and information on soil conservation history was collated to help interpret temporal sedimentation trends. The peak fallout of Cs-137 in 1963 appeared at a depth of 84 cm in core A and 56 cm in core B. The peaks of sand contents were related to the peaks of rainfall erosivity which were recorded in 1982, 1989, 1998 and 2005, respectively. Sedimentation rates were calculated according to the sediment profile chronological controls of 1956, 1963, 1982, 1989, 1998 and 2005. The highest sedimentation rate was around 2.0 cma (TM) a(-1) between 1982 and 1988 when the Chinese national reform and the Household Responsibility System were implemented, leading to accelerated soil erosion in the Longxi catchment. Since 1990s, and particularly since 2005, sedimentation rates clearly decreased, since a number of soil conservation programs have been carried out in the catchment. The combined use of Cs-137 chronology, particle size and rainfall erosivity provided a simple basis for reconstructing reservoir sedimentation dynamics in the context of both physical processes and soil restoration. Its advantages include avoiding the need for full blown sediment yield reconstruction and the concomitant consideration of core correlation and corrections for autochthonous inputs and reservoir trap efficiency. |
| WOS标题词 | Science & Technology ; Life Sciences & Biomedicine |
| 类目[WOS] | Environmental Sciences |
| 研究领域[WOS] | Environmental Sciences & Ecology |
| 关键词[WOS] | UPPER YANGTZE-RIVER ; SOIL-EROSION ; ACCUMULATION RATES ; FALLOUT CESIUM-137 ; LAKE-SEDIMENTS ; RESERVOIR ; LAND ; PB-210 ; BASIN ; PROFILES |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000375790800009 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/15128]  |
| 专题 | 成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2016_Vol13 No.5 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.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Rothamsted Res, Sustainable Soils & Grassland Syst Dept, Okehampton EX20 2SB, Devon, England 4.Linyi Univ, Shandong Prov Key Lab Water & Soil Conservat & En, Linyi 276005, Peoples R China |
| 推荐引用方式 GB/T 7714 | Gao Jin-zhang,Long Yi,Zhang Xin-bao,et al. Interpreting sedimentation dynamics at Longxi catchment in the Three Gorges Area, China, using Cs-137 activity, particle size and rainfall erosivity[J]. JOURNAL OF MOUNTAIN SCIENCE,2016,13(5):857-869. |
| APA | Gao Jin-zhang.,Long Yi.,Zhang Xin-bao.,Adrian, Collins L..,He Xiu-bin.,...&Shi Zhong-lin.(2016).Interpreting sedimentation dynamics at Longxi catchment in the Three Gorges Area, China, using Cs-137 activity, particle size and rainfall erosivity.JOURNAL OF MOUNTAIN SCIENCE,13(5),857-869. |
| MLA | Gao Jin-zhang,et al."Interpreting sedimentation dynamics at Longxi catchment in the Three Gorges Area, China, using Cs-137 activity, particle size and rainfall erosivity".JOURNAL OF MOUNTAIN SCIENCE 13.5(2016):857-869. |
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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