Using the comprehensive governance degree to calibrate a piecewise sediment delivery ratio algorithm for dynamic sediment predictions: A case study in an ecological restoration watershed of northwest China
文献类型：期刊论文
| 作者 | Wu, Lei1,2,3,4; Yao, Weiwei5; Ma, Xiaoyi1,4
|
| 刊名 | JOURNAL OF HYDROLOGY
 |
| 出版日期 | 2018-09-01 |
| 卷号 | 564页码:888-899 |
| ISSN号 | 0022-1694 |
| 关键词 | Sediment delivery ratio Piecewise algorithm Sediment transport Ecological restoration Comprehensive governance degree |
| DOI | 10.1016/j.jhydrol.2018.07.072 |
| 通讯作者 | Ma, Xiaoyi(xma@nwsuaf.edu.cn) |
| 英文摘要 | The sediment delivery ratio (SDR) is a bond of slope erosion and channel sediment transport but exhibits poor dynamic applicability, which makes it difficult to accurately identify the spatio-temporal evolutions of sediment yield in an ecological restoration watershed with different governance degrees. i) An innovative piecewise SDR algorithm considering the multi-stage effects of the comprehensive governance degree from 1991 to 2013 was embedded in a dynamic sediment yield model to solve the complex dynamic applicability problem of the SDR in sediment yield predictions. ii) The main advantages of the improved SDR algorithm over the existing models are small data requirements, dynamic mechanism, wide application range, reduced complexity, ease of use and better accuracy. iii) The erosion intensities of sloping farmland and orchards in the Yangou River watershed were both intensive at the early stage of governance in 1997. The trends in erosion and sediment yield were closely related to the watershed management measures. The soil erosion modulus in this watershed decreased from 5657 t/km(2) in 1997 to 906.2 t/km(2) in 2012, a total decrease rate of 84%. The sediment yield modulus decreased from 4500 t/km(2) in 1997 to 51.9 t/km(2) in 2012, a total reduction rate of 98.8%. iv) The annual dynamics of the SDR values were not completely affected by the random fluctuations in rainfall erosivity but showed an obvious decreasing trend from 0.932 in 1992 to 0.057 in 2012 due to the soil conservation measures. The annual average SDR in 1991-2013 was approximately 0.38, indicating that the average sediment yield after ecological restoration was significantly less than the average soil erosion in the Yangou River watershed. The results of this study may provide a better understanding of dynamic SDR studies and reveal the profound insights needed to guide watershed soil conservation planning. |
| WOS关键词 | NONPOINT-SOURCE POLLUTION ; SOIL-EROSION ; GULLY REGION ; LOESS PLATEAU ; YIELD ; IMPACTS ; RUNOFF ; BASIN ; SIMULATION ; VEGETATION |
| 资助项目 | National Natural Science Foundation of China[51679206] ; Youth Science and Technology Nova Project in Shaanxi Province[2017KJXX-91] ; Fundamental Research Funds for the Central Universities[2452016120] ; Special Research Foundation for Young Teachers[2452015374] ; International Science and Technology Cooperation Funds[A213021603] ; National Fund for Studying Abroad (CSC)[201706305014] ; [Z111021720] |
| WOS研究方向 | Engineering ; Geology ; Water Resources |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE BV |
| WOS记录号 | WOS:000445316200069 |
| 资助机构 | National Natural Science Foundation of China ; Youth Science and Technology Nova Project in Shaanxi Province ; Fundamental Research Funds for the Central Universities ; Special Research Foundation for Young Teachers ; International Science and Technology Cooperation Funds ; National Fund for Studying Abroad (CSC) |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/52947]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Ma, Xiaoyi |
| 作者单位 | 1.Northwest A&F Univ, Key Lab Agr Soil & Water Engn Arid & Semiarid Are, Minist Educ, Yangling 712100, Shaanxi, Peoples R China 2.Univ Calif Berkeley, Dept Civil & Environm Engn, Berkeley, CA 94720 USA 3.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 4.Northwest A&F Univ, Coll Water Resources & Architectural Engn, Yangling 712100, Shaanxi, Peoples R China 5.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Environm Remediat, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Lei,Yao, Weiwei,Ma, Xiaoyi. Using the comprehensive governance degree to calibrate a piecewise sediment delivery ratio algorithm for dynamic sediment predictions: A case study in an ecological restoration watershed of northwest China[J]. JOURNAL OF HYDROLOGY,2018,564:888-899. |
| APA | Wu, Lei,Yao, Weiwei,&Ma, Xiaoyi.(2018).Using the comprehensive governance degree to calibrate a piecewise sediment delivery ratio algorithm for dynamic sediment predictions: A case study in an ecological restoration watershed of northwest China.JOURNAL OF HYDROLOGY,564,888-899. |
| MLA | Wu, Lei,et al."Using the comprehensive governance degree to calibrate a piecewise sediment delivery ratio algorithm for dynamic sediment predictions: A case study in an ecological restoration watershed of northwest China".JOURNAL OF HYDROLOGY 564(2018):888-899. |
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。