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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
Wu, Lei1,2,3,4; Yao, Weiwei5; Ma, Xiaoyi1,4
2018-09-01
Source PublicationJOURNAL OF HYDROLOGY
ISSN0022-1694
Volume564Pages:888-899
Corresponding AuthorMa, Xiaoyi(xma@nwsuaf.edu.cn)
AbstractThe 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.
KeywordSediment delivery ratio Piecewise algorithm Sediment transport Ecological restoration Comprehensive governance degree
DOI10.1016/j.jhydrol.2018.07.072
WOS KeywordNONPOINT-SOURCE POLLUTION ; SOIL-EROSION ; GULLY REGION ; LOESS PLATEAU ; YIELD ; IMPACTS ; RUNOFF ; BASIN ; SIMULATION ; VEGETATION
Indexed BySCI
Language英语
Funding ProjectNational 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]
Funding OrganizationNational 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)
WOS Research AreaEngineering ; Geology ; Water Resources
WOS SubjectEngineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS IDWOS:000445316200069
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/52948
Collection中国科学院地理科学与资源研究所
Corresponding AuthorMa, Xiaoyi
Affiliation1.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
Recommended Citation
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.
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