Dating reservoir deposits to assess the recently changing sediment yields from a medium-sized agricultural catchment
文献类型：期刊论文
| 作者 | Zhang Yunqi1; Long Yi2 ; Lu Xue1; Pei Zengli1; Wu Zhehong1; Zheng Jiangkun1; Xu Shujian3; Wang Xiaoli3; Li Wei4
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| 刊名 | LAND DEGRADATION & DEVELOPMENT
 |
| 出版日期 | 2019 |
| 卷号 | 30期号:16页码:1939-1953 |
| ISSN号 | 1085-3278 |
| 关键词 | Cs-137 and Pb-210(ex) dating historical sediment yield human activity medium-sized catchment reservoir deposit |
| DOI | 10.1002/ldr.3391 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | Medium-sized catchments exhibit different patterns of sediment yield than small catchments and large river basins (taking scale dependency into account) and play in soil loss from upstream areas with downstream sediment transportation over larger spatial scales than small catchments. Few studies have used reservoir depositional records to assess historical sediment yields at the scale of a medium-sized catchment. By analyzing six cores obtained from reservoir deposits, this investigation reconstructed the recent sediment yield from a medium-sized agricultural catchment (the Xujiaya catchment in Northern China) and examined the changing pattern of sediment yield over the past 57 years. The cores were dated using the Cs-137 and Pb-210(ex) methods. The historical specific sediment yields (SSYs) were estimated based on the original reservoir capacity curve and the depositional chronology modeled using a composite chronological model based on the constant rate of supply (CRS) approach (i.e., the C-CRS model). The mean SSYs estimated from the six cores over each of seven short stages (i.e., 1959-1963, 1964-1972, 1973-1980, 1981-1989, 1990-1997, 1998-2007, and 2008-2016) defined over the 57-year study period ranged between 4.6 +/- 1.8 and 16.2 +/- 6.3 t ha(-1) yr(-1), with a mean value of 8.1 +/- 3.2 ha(-1) yr(-1) for all seven stages, and this mean value can be used to broadly represent the sediment yield from the catchment since dam construction. These SSY values are relatively high, reflecting intense agricultural disturbance and the underlying lithology. The values were highest for the 1959-1963 stage and lowest in the following stage of 1964-1972 and then generally increased over the successive stages of 1973-1980, 1981-1989, and 1990-1997 before decreasing slightly during the last two stages after 1997. This change was driven mainly by human activity over the past 57 years. The results indicate that the environmental factors (e.g., human activity and lithology) influencing sediment yield in a medium-sized catchment are more complicated than those affecting a small catchment and reveal the characteristic pattern of sediment yield in medium-sized catchments. |
| 电子版国际标准刊号 | 1099-145X |
| 语种 | 英语 |
| WOS记录号 | WOS:000491489100005 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/31296]  |
| 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 |
| 通讯作者 | Zhang Yunqi |
| 作者单位 | 1.Sichuan Agr Univ, Coll Forestry, Chengdu 611130, Sichuan, Peoples R China; 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China; 3.Linyi Univ, Shandong Prov Key Lab Water & Soil Conservat & En, Linyi 276005, Shandong, Peoples R China; 4.Linyi Hydrol Bur, Water Resource Dept, Linyi 276000, Shandong, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang Yunqi,Long Yi,Lu Xue,et al. Dating reservoir deposits to assess the recently changing sediment yields from a medium-sized agricultural catchment[J]. LAND DEGRADATION & DEVELOPMENT,2019,30(16):1939-1953. |
| APA | Zhang Yunqi.,Long Yi.,Lu Xue.,Pei Zengli.,Wu Zhehong.,...&Li Wei.(2019).Dating reservoir deposits to assess the recently changing sediment yields from a medium-sized agricultural catchment.LAND DEGRADATION & DEVELOPMENT,30(16),1939-1953. |
| MLA | Zhang Yunqi,et al."Dating reservoir deposits to assess the recently changing sediment yields from a medium-sized agricultural catchment".LAND DEGRADATION & DEVELOPMENT 30.16(2019):1939-1953. |
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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