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Integrated assessment of river health based on water quality, aquatic life and physical habitat

Journal of Environmental Sciences 2009年第8期21卷 1017-1027页

作者： MENG Wei ZHANG Nan ZHANG Yuan ZHENG Binghui River and Costal Environmental Research Center China Research Academy of Environment Science Beijing 100012 China Key Laboratory of Water and Sediment Sciences College of Water Sciences Beijing Normal University Beijing 100875 China

The health conditions of Liao River were assessed using 25 sampling sites in April 2005, with water quality index, biotic index and physical habitat quality index. Based on the method of cluster analysis （CA） for water quality indices, it revealed that heavily polluted sites of Liao River are located at estuary and mainstream. The aquatic species surveyed were attached algae and benthic invertebrates. The result showed that the diversity and biomass of attached algae and benthic index of biotic integrity （B-IBI） were degrading as the chemical and physical quality of water bodies deteriorating. Physiochemical parameters, BODs, CODcr, TN, TP, NH3-N, DO, petroleum hydrocarbon and conductivity, were statistically analyzed with principal component analysis and correlation analysis. The statistical results were incorporated into the integrated assessing water quality index, combining fecal coliform count, attached algae diversity, B-IBI and physical habitat quality score. A comprehensive integrated assessing system of fiver ecological health was established. Based on the systimetic assessment, the assessed sites are categorized into 9 ＂healthy＂ and ＂sub-healthy＂ sites and 8 ＂sub-sick＂ and ＂sick＂ sites.

关键词： Liao River river health assessment benthic-index of biotic integrity water quality physical habitat conditions

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