石羊河流域生态环境质量评价研究

Assessment of Ecological Environment Quality of Shiyang River Basin

从水环境,绿洲及植被,土壤盐渍化及土地沙漠化方面建立了流域生态环境质量评价指标体系,并采用改进的灰色关联投影法与评价等级结合的方法对流域内行政分区的古浪县、凉州区、金昌市和民勤县的生态环境质量进行了评价。评价结果表明:古浪县为一般,凉州区和金昌市较差,民勤县为恶劣,且处于恶劣和非常恶劣的边缘。评价结果与实际情况一致,说明该评价指标体系和评价方法具有一定的合理性和科学性。

Through analysis of water resources development on the ecological environment quality of the Shiyang River basin, an as sessment system of ecological environment quality was established according to the following aspects： water environment, oasis vegetation, soil salinity and land desertification, Combination of the improved grey relation projection method and the assessment grades was adopted to evaluate the ecological environment qualities of Gulang County, Liangzhou District, Jinchang City and Minqin Coun- ty. The results showed that the eco-environment in Gulang County was better than in Liangzhou District and Jinchang City, and that in Minqin county was the worst, which coincided with the fact, indicating that the index system and assessment method were rational and scientific.