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Natural hydrological regime of rivers is an important reference for the assessment of ecological flow. However, the hydrological alterations are associated with the influence of climate change and human activities. Considering the variation of intra-annual distribution of runoff, this study evaluated the ecological flow of different river environmental management objectives by using flow duration curve shifting method. The results show that the change points of hydrological time series occurred in 2008 for Chiang Saen and Luang Prabang, 2012 for NongKhai station, and 2006 for Pakse and Stung Treng station. Approximately 72%～80% of the annual flow was determined as ecological flow for five stations on the Mekong mainstream to maintain the optimal ecological condition, while 33%～49% of the annual flow is needed to protect the basic functions of the river ecosystem. The satisfaction rate of ecological flow for EMC-A and EMC-B increased in dry season and decreased in rainy season after hydrological alterations while the variations from EMC-C to EMC-F do not obvious. The results of this study will provide a reference for transboundary water resources management and ecological protection in the Mekong River Basin.
[1] 张强，李剑锋，陈晓宏，等.水文变异下的黄河流域生态流量[J].生态学报，2011,31(17):4826-4834.
[2] HARRIS I,OSBORN T J,JONES P,et al.Version 4 of the CRU TS monthly high-resolution gridded multivariate climate dataset[J].Scientific data,2020,7:109.
[3] 黄英，刘新有.水电开发对河流水沙年内分配的影响分析[J].水科学进展，2010,21(3):385-91.
[4] SMAKHTIN V.An assessment of environmental flow requirements of Indian river basins [R].IWMI research report 107,Colombo,Sri Lanka:international water management institute (IWMI),2006.
[5] SMAKHTIN V U,ERIYAGAMA N.Developing a software package for global desktop assessment of environmental flows [J].Environmental modelling & software,2008,23:1396-1406.
[6] HUGHES D A,SMAKHTIN V.Daily flow time series patching or extension:A spatial interpolation approach based on flow duration curves [J].Hydrological sciences journal-journal des sciences hydrologiques,1996,41(6):851-871.
[7] Mekong River Commission 2005.Overview of the Hydrology of the Mekong Basin[R].Mekong river commission,vientiane,november 2005,73.
[8] 李捷，夏自强，马广慧，等.河流生态径流计算的逐月频率计算法[J].生态学报，2007,27(7):2916-2921.
[9] MAHMOOD R,JIA S,LV A,et al.A preliminary assessment of environmental flow in the three rivers' source region,Qinghai Tibetan Plateau,China and suggestions [J].Ecological engineering,2020,144:105709.
[10] 胡波，崔保山，杨志峰，等.澜沧江(云南段)河道生态需水量计算[J].生态学报，2006,26(1):163-173.
[11] TENNANT D L.Instream flow regimens for fish,wildlife,recreation and related environmental resources[J].Fisheries,1976,1(4):6-10.
[12] 郭利丹，夏自强，李捷.河流生态径流量常用计算方法的对比 [J].人民黄河，2008(4):28-30.
[13] 刘剑宇，张强，顾西辉.水文变异条件下鄱阳湖流域的生态流量[J].生态学报，2015,35(16):5477-5485.
[14] HECHT J S,LACOMBE G,ARIAS M E,et al.Hydropower dams of the Mekong River basin:A review of their hydrological impacts [J].Journal of hydrology,2019,568:285-300.
[15] BINH D V,KANTOUSH S A,SABER M,et al.Long-term alterations of flow regimes of the Mekong River and adaptation strategies for the Vietnamese Mekong Delta [J].Journal of hydrology:regional studies,2020,32:100742.
Basic Information:
China Classification Code:X143;TV213.4
Citation Information:
[1]WU Xin-qu,ZHU Meng-tao,LI Yun-gang.Evaluation of Ecological Flow in the Mekong River Considering the Hydrological Alterations[J].Water Resources and Power,2022,40(04):74-78.
Fund Information:
国家自然科学基金项目(42067033,41661099)
2021-04-23
2021
2022-02-17
2021-06-18
2021
1
2022-04-25
2022-04-25