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- Title
An approach for integrated assessment of eco-risk in coastal waters based on catastrophe theory: Taking Luoyuan Bay as a case.
- Authors
Chen Ke-liang; Shi Ya-lou; Lin Zhi-lan; Wang Jin-keng; Ouyang Yu-rong; Jiang Jin-long
- Abstract
Based on catastrophe theory, this paper established an index system and catastrophe progression model for the integrated assessment of ecorisk in coastal waters, including three risk types of "eutrophication-heavy metal pollution-organic pollution" and three dimensions of "water-sediment organism". According to the related quality standards, a four-level evaluation standard of eco-risk (zero, low, medium, and high) was proposed, and by using the monitoring data of 2007 and 2009, an integrated assessment of the ecorisk in Luoyuan Bay was conducted. In 20072009, the spatial variation of the ecorisk in Luoyuan Bay had a downward trend from bayhead to baymouth, and the risk level in 2009 was overall lower than that in 2007. The key factor of the ecorisk in the Bay was eutrophication. The approach established in this paper could identify the spatiotemporal variation characteristics of ecorisk in coastal waters, and better reflect the key ecorisk factor, providing a basic approach for effective forecasting and early warning of ecorisk in coastal waters.
- Subjects
CATASTROPHE theory (Mathematics); INTRACOASTAL waterways; ECOLOGICAL risk assessment; EUTROPHICATION; HEAVY metal content of water; ENVIRONMENTAL monitoring
- Publication
Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao, 2012, Vol 23, Issue 1, p213
- ISSN
1001-9332
- Publication type
Article