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《节能环保 和谐发展——2007中国科协年会论文集(二)》 2007年
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Ecological Instream Flow Requirements Calculation of Pihe River by Montana Methodology in Sichuan Basin,China

【摘要】:正With the rapid economic developments in China,the future water resource developments should be sustainable and that a component of the natural flow of rivers should be reserved to ensure diverse ecological functioning.In last 15 years,ecological instream flow requirements(EIFR)research of river was one of the main and hot fields for eco-hydrology scientists.In this paper,we summarized the research advance of eco-hydrology and also,the conception of the EIFR was also followed and calculated.The ecological instream flow has three main functions:maintain the water ecological environments,dilute pollutants and evaporate.To coordinate with the water resource allocation,we evaluated EIFR of Pihe River section in every 12 month of three typical years (1968,1986 and 1987).Pihe River is one of the main waterr sources for the cities in Sichuan Basin and locates in the lower beach of famous Doujiang Weir.The Montana methodology was widely applied in water requirements estimate and proved usefidly.Based on natural characters of Pihe River,minimum and optimum water requirement of aquatic habitat for the river maintenance were counted.Evaporation water requirement of Pihe River was computed too,which is related with the width of water surface,the river length and evaporation depth. Considering the water quality goal,diluting pollutant water requirement was taken into accounted.Then the EIFR of the river of 12 month were ultimateS,ascertained.Among them,that was 20.64m~3/s and the minimum eco-environmental water requirement of the river was 25.84m~3/s.

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