Evaluation On The Ecological Environment Quality Of Dagang Wetland Park

Evaluation on the ecological environment quality of city wetland park is helpful to make clear of the ecological situation of the wetland park and the development trend of it, thus ensuring the healthy development of city wetland park and making the best use of its ecological and social functions. Objecting to the wetland park in Tianjin City,Dagang District where the soil salinization is very serious, this issue, with the method of AHP and fuzzy comprehensive evaluation, mainly studies four subsystems(landscape pattern, soil ecology, wetland ecology, and human interference) and establishes the index system on ecological environment quality evaluation about this wetland park and works out the weight of the quality evaluation index of ecological environment to ensure that the ecological environment quality can be evaluated and the landscape of the field can be analyzed smoothly.In landscape pattern index, the evaluation value of the dominance, diversity, fragmentation and plaque of dimension respectively are 27.3, 13.5, 23.0 and 8.6, the comprehensive evaluation value of the landscape pattern is 72.4, which is general level. In soil ecology index, the evaluation value of salt content, pH value, the content of soil organic matter and groundwater level respectively are 21.1, 17.5, 11.3 and 8.7, the comprehensive evaluation value of the soil ecology is 58.6, which is low level. In wetland ecology index, the evaluation value of the wetland vegetation density, introduced species accounts for the proportion of native species, wetland loss rate, naturalness and the ratio of wetland to the area of the park respectively are 18.5, 2.6, 25.4, 9.6 and 15.9, the comprehensive evaluation value of the wetland ecology is 72.0, which is general level. In human disturbance index, the evaluation value of distance to industrial zone, human disturbance degree and the tourist environmental compliance rate respectively are 20.0, 28.0 and 16.0, the comprehensive evaluation value of human disturbance index is 64.0, which is low level. The comprehensive evaluation value of the quality of the ecological environment of this wetland park is 68.2, which is general level. All the results show that the ecological environment of this wetland park has not been improved obviously and the ecological and social effect is not apparent. What causes this ? one reason is the primitive condition of the location of the wetland park is complex, the environment is bad and human being disturbed the area greatly, the other reason is the wetland park has been built for just a short time, so the positive effects have not been showed fully. The establishment and evaluation of the quality evaluation index system of the ecological environment in Dagang wetland park has, to a certain degree, reflected the situation of the ecological environment of the wetland park and is of guiding significance to the future management and development of this wetland park.It is still need several years to show the ecological benefits of Dagang wetland park and its improving functions to the ecological environment around ,and it is still need a long period of time to observe and study the scientific evaluation of the ecological environment quality of this wetland park.