流域生态

用斜率和曲率湿周法推求河道最小生态需水量的比较

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  • 1. 中国科学院地理科学与资源研究所陆地水循环与地表过程重点实验室, 北京100101;
    2. 中国科学院地理科学与资源研究所生态网络观测与模拟重点实验室, 北京 100101;
    3. 西北农林科技大学水利与建筑工程学院, 西安 712100
刘苏峡 (1965-), 女, 副研究员。从事流域水文过程、模拟研究。E-mail: liusx@igsnrr.ac.cn

收稿日期: 2005-09-28

  修回日期: 2006-01-12

  网络出版日期: 2006-03-25

基金资助

国家自然科学基金项目(90211007; 50279049); 中国科学院地理科学与资源研究所创新项目(CXIOG-A04-12; CX10G-E01-08)

Uncertainty Analysis in Estimating the Minimum Ecological Instream Flow Requirements via Wetted Perimeter Method: Curvature Technique or Slope Technique

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  • 1. Key Lab. of Water Cycle & Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research (IGSNRR), CAS, Beijing 100101, China;
    2. Key Lab of Ecological Net Observation and Modelling, IGSNRR, CAS, Beijing 100101, China;
    3. College of Water Conservancy and Architectural Engineering, Northwest A&F University, Xi'an 712100, China

Received date: 2005-09-28

  Revised date: 2006-01-12

  Online published: 2006-03-25

Supported by

Natioanl Natural Science Foundation of China, No.90211007; No.50279049; Knowledge Innovation Project of IGSNRR, CAS, No.CXIOG-A04-12; No.CX10G-E01-08

摘要

从湿周-流量曲线临界点的两种不同确定准则入手,分析湿周法推求河道内最小生态需水量 (minimum ecological instream flow requirements, 简称MEIFR) 的不确定性。假设河道呈三角形断面和均匀流,得到湿周法的解析解表达式。表达式显示斜率法 (曲线上斜率为1) 和曲率法 (曲线上曲率最大) 二者所得的MEIFR结果迥异。当斜率法取斜率为0.39时,其相应的流量与曲率法结果一致。MEIFR对斜率临界值非常敏感,斜率法中的斜率临界值难以确定,相比而言,曲率法更可靠。这用近似具有三角形断面的南水北调西线一期工程调水区流域的实际数据得到证实。根据我们在该区实地观测和收集的6条河35个河道断面的水深和水宽资料,用解析解估算出各断面的MEIFR。曲率法所估算的MEIFR结果为多年平均流量的2.5%~23.7%,大部分数据落在Tennant法的10%~30%的范围。斜率法为11%~105.7%,普遍偏大,超过这个范围。虽然采用较小的斜率临界点可使斜率法的估算结果变小,然而到底斜率临界点应取何值存在较大的不确定性。这进一步说明,在无法获得一个确定的斜率临界值的情况下,湿周法估算MEIFR宜采用曲率法确定临界点。本文的结果基于理想情况,更普遍的结论有待于对更多种河道断面的探讨。

本文引用格式

刘苏峡, 莫兴国, 夏军, 刘昌明, 林忠辉, 门宝辉, 吉利娜 . 用斜率和曲率湿周法推求河道最小生态需水量的比较[J]. 地理学报, 2006 , 61(3) : 273 -281 . DOI: 10.11821/xb200603006

Abstract

By comparing the two techniques to determine the critical point on the relationship curve between wetted perimeter and discharge for the estimates of the minimum ecological instream flow requirement (MEIFR), the uncertainty of the wetted perimeter method is analyzed. Under the assumptions of the triangular cross section channel and the uniform stable flow, an analytical solution of MEIFR is deduced. 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. It is found that the slope of the transition point with the maximum curvature is 0.39 and the MEIFR varies prominently with the variation of the slope threshold. This notes that if a certain value of the slope threshold is not available in the slope technique, the results of MEIFR via curvature technique by the wetted perimeter method are more certain. By applying the analytical solution of MEIFR in the rivers of Western Route South-to-North Water Transfer Project in China, it shows that 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%. This paper starts the research from the simple triangular cross section channels. More general conclusions rely on the more detailed research on various sections.

参考文献


[1] Li Lijuan, Zheng Hongxing. Environmental and ecological water consumption of river systems in Haihe-Luanhe basins. Acta Geographica Sinica, 2000, 55(4): 495-500.
[李丽娟, 郑红星. 海滦河流域河流系统生态环境需水量计算. 地理学报, 2000, 55(4): 495-500.]

[2] Shi Wei, Wang Guangqian. Estimation of ecological water requirement for the lower Yellow River. Acta Geographica Sinica, 2002, 57(5): 595-601.
[石伟, 王光谦. 黄河下游生态需水量及其估算. 地理学报, 2002, 57(5): 595-601.]

[3] Yan Denghua, He Yan, Deng Wei et al. Ecological water demand by the slope system in the East Liao River Basin. Acta Geographica Sinica, 2002, 57(6): 685-692.
[严登华, 何岩, 邓伟 等. 东辽河流域坡面系统生态需水研究. 地理学报, 2002, 57(6): 685-692.]

[4] Liu Suxia, Mo Xingguo, Zhu Yonghua et al. A new method for ecological water consumption calculation and application in Haihe River Basin. Journal of Natural Resources, 2004, 19(5): 662-671.
[刘苏峡, 莫兴国, 朱永华 等. 基于水量平衡的流域生态耗水量计算: 以海河为例. 自然资源学报, 2004, 19(5): 662-671.]

[5] Shen Fengsheng, Hong Shangchi, Tan Yingwu. Main Problems in South-North Water Transfer West Route Project. Advances in Science and Technology of Water Resources, 2002, 22(1): 1-6.
[沈凤生, 洪尚池, 谈英武. 南水北调西线工程主要问题研究. 水利水电科技进展, 2002, 22(1): 1-6.]

[6] Chen Huanlei. Initializing the Western Route South-to-North Water Transfer Project is right on the track. The China Water Resources Daily, 2004-07.
[陈焕雷. 南水北调西线前期工作全面铺开. 中国水利报, 2004-07.]

[7] Liu Changming. The analysis of China's water supply and water demand in 21st century. China Water Resources, 1999, (10): 18-20.
[刘昌明. 中国21世纪水供需分析. 生态水利研究, 中国水利, 1999, (10): 18-20.]

[8] Cui Shubin, A research on issues of water demand for ecological environment. China Water Resources, 2001, (8): 71-75.
[崔树彬. 关于生态环境需水量若干问题的探讨. 中国水利, 2001, (8): 71-75.]

[9] Wang Xiqin, Liu Changming, Yang Zhifeng. Research advance in ecological water demand and environmental water demand. Advances in Water Science, 2002, 13(4): 507-514.
[王西琴, 刘昌明, 杨志峰. 生态及环境需水量研究进展与前瞻. 水科学进展, 2002, 13(4): 507-514.]

[10] Su Xiaoling, Kang Shaozhong. Concept of ecological water requirement and its estimation method. Advances in Water Science, 2003, 14(6): 740-743.
[粟晓玲, 康绍忠. 生态需水的概念及其计算方法. 水科学进展, 2003, 14(6): 740-743.]

[11] Song Jinxi, Li Huaien, Wang Boduo. Summary on research of ecological and environmental water requirement of river. Journal of Soil and Water Conservation, 2003, 17(6): 95-98.
[宋进喜, 李怀恩, 王伯铎. 河流生态环境需水量研究综述. 水土保持学报, 2003, 17(6): 95-98.]

[12] Shao Hongbo, Liang Zongsuo, Shao Mingan. Some advances in the study of eco-environmental use of water. Journal of Arid Land Resources and Environment, 2004, 18(3): 97-102.
[邵宏波, 梁宗锁, 邵明安. 生态环境用水的某些进展. 干旱区资源与环境, 2004, 18(3): 97-102.]

[13] Xu Zhixia, Chen Minjian, Dong Zengchuan. Comments on calculation methods for river ecological water demand. Journal of Hohai University (Natural Sciences), 2004, 32(1): 6-9.
[徐志侠, 陈敏建, 董增川. 河流生态需水计算方法评述. 河海大学学报 (自然科学版), 2004, 32(1): 6-9.]

[14] Acreman Mike. Linking science and decision-making: features and experience from environmental river flow setting. Environmental Modelling & Software, 2005, 20: 99-109.

[15] Tennant D L. Instream flow regimens for fish, wildlife, recreation and related environmental resources. In: Osborn J F, Allman C H (eds.), Proceedings of the Symposium and Special Conference on Instream Flow Needs, Vol. II, May 3-6, Boise, Idaho. American Fisheries Society, Bethesda, 1976. 359-373.

[16] Gore J A, Nestler J M. Instream flow studies in perspective. Regulated Rivers: Research and Management, 1998, (2): 93-101.

[17] Hughes D A, Hannart P. A desktop model used to provide an initial estimate of the ecological instream flow requirements of rivers in South Africa. Journal of Hydrology, 2003, 270(3-4): 167-181.

[18] Arthington A H, King J, O'Keefe J H et al. Development of a holistic approach for assessing environmental flow requirements of riverine ecosystems. In: Pigram J J, Hooper B P (eds.), Proceedings of an International Seminar and Workshop on Water Allocation for the Environment. The Center for Water Police Research. University of New England, Armidale, 1992. 282-295.

[19] Annear T C, Conder A L. Relative bias of several fisheries instream flow methods. N Am J Fish Mgmt., 1984, 4: 531-539.

[20] Gippel C J, Stewardson M J. Use of wetted perimeter in defining minimum environmental flows. Regulated Rivers: Research and Management, 1998, 14(1): 53-67.

[21] Gordon N D, McMahon T A, Finlayson B L et al. Stream Hydrology: An Introduction for Ecologists. 2nd edn. John Wiley & Sons, 2004. 444.

[22] Liu S, Mo X, Xia J et al. The uncertainty analysis of the wetted perimeter method via axis scaling for setting minimum ecological in-stream flow requirements. In: (reviewed) Proceedings of The MODSIM2005 Congress, 12-16 December, Melbourne 2005.

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