Estimating the minimum in-stream flow requirements via wetted perimeter method based on curvature and slope techniques
文献类型：期刊论文
| 作者 | Liu Suxia ; Mo Xingguo; Xia Jun; Liu Changming; Lin Zhanghui; Men Baohui; Ji Lina
|
| 刊名 | 地理学报：英文版
 |
| 出版日期 | 2006 |
| 卷号 | 16.0期号:002页码:242 |
| 关键词 | 河道 最小生态需水量 斜率 曲率湿周法 |
| ISSN号 | 1009-637X |
| 英文摘要 | Under 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. |
| 语种 | 英语 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/155065]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 作者单位 | 中国科学院地理科学与资源研究所 |
| 推荐引用方式 GB/T 7714 | Liu Suxia,Mo Xingguo,Xia Jun,et al. Estimating the minimum in-stream flow requirements via wetted perimeter method based on curvature and slope techniques[J]. 地理学报：英文版,2006,16.0(002):242. |
| APA | Liu Suxia.,Mo Xingguo.,Xia Jun.,Liu Changming.,Lin Zhanghui.,...&Ji Lina.(2006).Estimating the minimum in-stream flow requirements via wetted perimeter method based on curvature and slope techniques.地理学报：英文版,16.0(002),242. |
| MLA | Liu Suxia,et al."Estimating the minimum in-stream flow requirements via wetted perimeter method based on curvature and slope techniques".地理学报：英文版 16.0.002(2006):242. |
入库方式： OAI收割
来源：地理科学与资源研究所
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