Healthy Diagnosis for Wetlands on the Laizhou Bay's Coastal Plain of Shouguang City, Shandong Province of China

the health evaluation of wetland ecosystem in coastal plain of Shouguang City. Taking the wetlands on coastal plain of Shouguang City as a case, this paper evaluated the health of the wetland by using fuzzy comprehensive judging model. The connotation and correlative theories of wetland health were first expatiated here. According to interrelated fundamental, the paper selected twenty three indexes from the ecological character, unitary function and the society environment of the wetland, and then established an indicator system for ecosystem health evaluation of wetland on coastal plain of Shouguang City. The indicator system includes monomial index, subtype index and composite index, and each index measures off four grades according to corresponding standard, the grades are excellent health, health, subhealth and illness. The paper established subject degree of each grade for each index and formatted matrix of judgment,and also formatted the right weight vector of each index by referring to the opinion of experts,and ultimately evaluated the health of wetland ecosystem on coastal plain of Shouguang City by using two-grad fuzzy comprehensive judging model. In view of the evaluation results some illness factors of the wetland were discussed in the end.