Ecological Risk Value Assessment as Index of Water Quality (on Example of the Dnieper River)
In the paper the ecological risk assessment for Belarussian rivers with different degree of pollution is given. The method is based on a probability approach and uses Woodiwiss index. According to risk values the quality of river ecosystems in Belarus is quite high. In a site of a sewage discharge the risk probability runs up to 80％~90％. In order to inter- calibrate index values for a comparative analysis between international, national, regional and basin levels a percentile principle of establishment of critical values of the Woodiwiss index equal to 25％ was applied. A given approach has allowed more precisely to monitor probability of alterations in ecosystems and to reveal a possibility of further degradation at early stages. The risk assessment approach allows to display the reference sites. The use of them is recommended by the Water Frame Directive of the EU as one of general mechanisms of a comparative analysis of a water quality. The definition and use of risk probability values for river systems is an universal mechanism of determination and monitoring of a water quality and may be a tool for decisions making on a water resource management.
belarus ecological risk assessment woodiwiss index river ecosystem reference site
Baitchorov Vladimir
Institute of zoology Academe of sciences of Bclarus. 220072, Akademicheskaya str. 27, Minsk, Belarus
国际会议
山东东营
英文
58-66
2007-10-16（万方平台首次上网日期，不代表论文的发表时间）