A METHOD FOR DETERMINING ECOLOGICAL RISKS OF HEAVY METAL POLLUTION IN RIVER AND LAKE SEDIMENTS

摘要

The present disclosure discloses a method for determining ecological risks of heavy metal pollution in sediments of river and lake. The method includes the following steps of: (1) determining concentration levels of heavy metal pollutants at different positions of water body sediments; (2) conducting statistic analysis on distribution characteristics of concentration data of various heavy metal pollutants in the water body sediments; (3) calculating an ecological risk index of a heavy metal pollutant using a formula; (4) calculating a final result of E_rⁱ; (5) drawing a distribution curve of E_rⁱ values; (6) calcualting a total ecological risk comprehensive index HRI caused by various heavy metal pollutants in the evalulated water body, and drawing a cumulative probability distribution curve of HRI values; and (7) analyzing a probability that the total ecological risk comprehensive index HRI of the water body appears at different risk levels with reference to a risk level classification standard.