| 17 water quality and biological indicators of the samples from 11 sampling sites in Taiyangshan Wetland were monitored, the index weights were determined by analytic hierarchy process and entropy method, and the health status of aquatic ecosystem in the study area was evaluated by gray correlation method and fuzzy comprehensive evaluation. The results showed that under the weight of AHP, according to grey correlation method, the South Lake was sub health and the other lakes were unhealthy, while according to fuzzy comprehensive evaluation, the four lakes were morbid. Under the weight of entropy method, the evaluation by grey correlation method showed that the South Lake as very healthy, and the others were unhealthy, while by fuzzy comprehensive evaluation, the West Lake was unhealthy, the South Lake was very healthy, and the others were morbid. Combined with the calculation process of the two evaluation methods and the actual situation of the study area, the result by fuzzy comprehensive evaluation was more realistic than that by grey correlation method. |
