Sediment sources, soil loss rates and sediment yields in a Karst plateau catchment in Southwest China
文献类型：期刊论文
| 作者 | Cheng, Qianyun3,4; Wang, Shijie4; Peng, Tao2,4; Cao, Le3,4; Zhang, Xinbao1 ; Buckerfield, Sarah J.2; Zhang, Yusheng; Collins, Adrian L.
|
| 刊名 | AGRICULTURE ECOSYSTEMS & ENVIRONMENT
 |
| 出版日期 | 2020 |
| 卷号 | 304页码:107114 |
| ISSN号 | 0167-8809 |
| 关键词 | Sediment source Fingerprinting Cs-137 Magnetic susceptibility Karst Headwater catchment Critical zone |
| DOI | 10.1016/j.agee.2020.107114 |
| 通讯作者 | Peng, Tao(pengtao@mail.gyig.ac.cn) |
| 产权排序 | 3 |
| 文献子类 | Article |
| 英文摘要 | Intensive agricultural activities have accelerated soil erosion and rocky desertification in karst regions of southwest China. Knowledge of sediment sources and soil erosion rates can be used to target soil conservation measures and to improve calibration and validation of process-based soil erosion and sediment delivery models for scenario analyses. Due to the complexity of karst environments, however, catchment scale information on these components of sediment budgets has rarely been assembled, meaning there continues to be an evidence gap. Within this context, this study selected Chenqi catchment, given its appropriate research infrastructure, to investigate sediment sources and soil loss rates in a typical karst agroforestry landscape. We estimated the relative contributions from three sources: surface soil, subsurface soil and clastic rock, using a composite fingerprinting procedure combining Cs-137 and magnetic susceptibility and a frequentist un-mixing model with Monte Carlo uncertainty analysis. Suspended sediment samples were taken at an hourly interval during seven rainfall events in 2017-2018 to characterize and quantify the sediment exported in both surface and underground drainage. The overall average median contributions (with 5th-95th percentile uncertainty ranges) from the sources to the suspended sediment samples from the surface drainage outlet were in the order: 62% (0-99%) subsurface soils, 25% (0-91%) surface soils and 13% (0-45%) clastic rock. For the sediment samples collected from the underground drainage catchment outlet, the corresponding estimates were in the order: 68% (0-97%) subsurface soils, 25% (0-53%) clastic rock and 7% (0-44%) surface soils. Plot scale soil loss rates were highest on cropland (0.70 Mg km(-2)) and pasture land (0.48 Mg km(-2)). The average (2017 and 2018) annual suspended sediment load exported through the surface outlet was 4.64 Mg km(-2) compared with 1.20 Mg km(-2) through the underground outlet. The broader implications of this study are that subsurface and clastic rock sources represent a significant component of the catchment sediment budget, meaning erosion control measures targeting hillslope surface soils alone may have limited impact on suspended sediment export at landscape scale. |
| 电子版国际标准刊号 | 1873-2305 |
| WOS关键词 | SUSPENDED SEDIMENT ; ROCKY DESERTIFICATION ; CS-137 INVENTORY ; CURRENT STATE ; LAND-USE ; EROSION ; RUNOFF ; REGION ; SIMULATION ; CESIUM-137 |
| 资助项目 | National Key Research and Development Program of China[2016YFC0502602] ; National Natural Science Foundation of China[41571130074] ; National Natural Science Foundation of China[U1612441] ; National Natural Science Foundation of China[41403112] ; International Partnership Project[132852KYSB20170029] ; Guizhou Provincial Science and Technology Department Project[(2018)5405] ; UK Research and Innovation (UKRI) via the Soil to Nutrition institute strategic programme grant from the UKRI-Biotechnology and Biological Sciences Research Council (UKRI-BBSRC)[BBS/E/C/000I0330] |
| WOS研究方向 | Agriculture ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000581101600004 |
| 资助机构 | National Key Research and Development Program of China ; National Natural Science Foundation of China ; International Partnership Project ; Guizhou Provincial Science and Technology Department Project ; UK Research and Innovation (UKRI) via the Soil to Nutrition institute strategic programme grant from the UKRI-Biotechnology and Biological Sciences Research Council (UKRI-BBSRC) |
| 源URL | [http://ir.imde.ac.cn/handle/131551/50730]  |
| 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 | Peng, Tao |
| 作者单位 | 1.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China; 2.Puding Karst Ecosystem Research Station, Chinese Academy of Sciences, Puding 562100, China; 3.University of Chinese Academy of Sciences, Beijing 100049, China; 4.State Key Laboratory of Environment Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; |
| 推荐引用方式 GB/T 7714 | Cheng, Qianyun,Wang, Shijie,Peng, Tao,et al. Sediment sources, soil loss rates and sediment yields in a Karst plateau catchment in Southwest China[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2020,304:107114. |
| APA | Cheng, Qianyun.,Wang, Shijie.,Peng, Tao.,Cao, Le.,Zhang, Xinbao.,...&Collins, Adrian L..(2020).Sediment sources, soil loss rates and sediment yields in a Karst plateau catchment in Southwest China.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,304,107114. |
| MLA | Cheng, Qianyun,et al."Sediment sources, soil loss rates and sediment yields in a Karst plateau catchment in Southwest China".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 304(2020):107114. |
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。