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Ecological Water Requirement (EWR) Analysis of High Mountain and Steep Gorge (HMSG) River—Application to Upper Lancang–Mekong River

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  • Hu Bo
  • Cui Baoshan
  • Dong Shikui
  • Zhai Hongjuan
  • Liu Zhaoyang

Abstract

As “corridor” in the south–north and “barrier” in the west–east direction, Lancang River, the upstream of Lancang–Mekong River, has an obvious spatial–temporal characteristic and unique regional attributes. Recently, the hydropower development of the mainstream along Lancang River has disturbed the regional ecosystem to have unstable factors, and threatened the ecosystem health. This paper used the couple model of Grading Coefficient of ecological water requirement (GCEWR) and the ecological runoff (ER) to simulate the ecological water requirement (EWR) of Lancang River, in a broad sense, this method belongs to hydrology–ecology methodology. In the GCEWR–ER, We adopted ecological characteristic indexes (ECI) and hydrological characteristic variables (e.g. variance index) to calculate the GCEWR, and used three methods to calculate the basic variable (e.g. ER) of EWR: the first method directly used annual average runoff as ER; the second method was used frequency method and took year as basic time unit, and the third method took season (e.g. flood season, non-flood season) as the basic time unit to evaluate ER. Finally, in order to demonstrate applicability of this developed methodology, this paper adopted GCEWR–ER method to calculate the EWR of Lancang River in the Longitudinal Range-Gorge Region. By the systematic analysis of the results, we could get the minimum, satisfying and optimal EWR for the Lancang River, which were 142.53 × 10 8 , 286.46 × 10 8 and 385.96 × 10 8 m 3 . The three EWR respectively occupied 25.10%, 50.46% and 67.98% of the average measured run-off (567.75 × 10 8 m 3 ) of the Lancang River, and respectively occupied 18.63%, 37.45% and 50.45% of the natural run-off (765 × 10 8 m 3 ) of the Lancang River. Copyright Springer Science+Business Media B.V. 2009

Suggested Citation

  • Hu Bo & Cui Baoshan & Dong Shikui & Zhai Hongjuan & Liu Zhaoyang, 2009. "Ecological Water Requirement (EWR) Analysis of High Mountain and Steep Gorge (HMSG) River—Application to Upper Lancang–Mekong River," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 23(2), pages 341-366, January.
    • Handle: RePEc:spr:waterr:v:23:y:2009:i:2:p:341-366
    DOI: 10.1007/s11269-008-9278-0
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    References listed on IDEAS

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    1. Jayasuriya, Rohan T., 2004. "Modelling the regional and farm-level economic impacts of environmental flows for regulated rivers in NSW, Australia," Agricultural Water Management, Elsevier, vol. 66(1), pages 77-91, April.
    2. Jens Hartmann & Jason Levy & Norio Okada, 2006. "Managing Surface Water Contamination in Nagoya, Japan: An Integrated Water Basin Management Decision Framework," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 20(3), pages 411-430, June.
    3. Hong Wu & Leen-Kiat Soh & Ashok Samal & Xun-Hong Chen, 2008. "Trend Analysis of Streamflow Drought Events in Nebraska," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 22(2), pages 145-164, February.
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    Cited by:

    1. Robyn Johnston & Matti Kummu, 2012. "Water Resource Models in the Mekong Basin: A Review," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 26(2), pages 429-455, January.
    2. Yanting Zheng & Jing He & Wenxiang Zhang & Aifeng Lv, 2023. "Assessing Water Security and Coupling Coordination in the Lancang–Mekong River Basin for Sustainable Development," Sustainability, MDPI, vol. 15(24), pages 1-20, December.

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