IGSNRR OpenIR
estimatingtheminimuminstreamflowrequirementsviawettedperimetermethodbasedoncurvatureandslopetechniques
Liu Suxia1; Mo Xingguo2; Xia Jun1; Liu Changming1; Lin Zhanghui2; Men Baohui1; Ji Lina1
2006
Source Publicationjournalofgeographicalsciences
ISSN1009-637X
Volume016Issue:002Pages:242
AbstractUnder the assumptions of triangular cross section channel and uniform stable flow, an analytical solution of the minimum ecological in-stream flow requirement (MEIFR) is deduced. Based on the analytical solution, the uncertainty of the wetted perimeter method is analyzed by comparing the two techniques for the determination of the critical point on the relationship curve between wetted perimeter, P and discharge, Q. It is clearly shown that the results of MEIFR based on curvature technique (corresponding to the maximum curvature) and slope technique (slope being 1) are significantly different. On the P-Q curve, the slope of the critical point with the maximum curvature is 0.39 and the MEIFR varied prominently with the change of the slope threshold. This indicates that if a certain value of the slope threshold is not available for slope technique, curvature technique may be a better choice. By applying the analytical solution of MEIFR in the losing rivers of the Western Route South-to-North Water Transfer Project in China, the MEIFR value via curvature technique is 2.5%-23.7% of the multi-year average annual discharge, while that for slope technique is 11%-105.7%. General conclusions would rely on the more detailed research for all kinds of cross-sections.
Language英语
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/77224
Collection中国科学院地理科学与资源研究所
Affiliation1.中国科学院地理科学与资源研究所
2.IGSNRR, CAS
First Author Affilication中国科学院地理科学与资源研究所
Recommended Citation
GB/T 7714
Liu Suxia,Mo Xingguo,Xia Jun,et al. estimatingtheminimuminstreamflowrequirementsviawettedperimetermethodbasedoncurvatureandslopetechniques[J]. journalofgeographicalsciences,2006,016(002):242.
APA Liu Suxia.,Mo Xingguo.,Xia Jun.,Liu Changming.,Lin Zhanghui.,...&Ji Lina.(2006).estimatingtheminimuminstreamflowrequirementsviawettedperimetermethodbasedoncurvatureandslopetechniques.journalofgeographicalsciences,016(002),242.
MLA Liu Suxia,et al."estimatingtheminimuminstreamflowrequirementsviawettedperimetermethodbasedoncurvatureandslopetechniques".journalofgeographicalsciences 016.002(2006):242.
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