Health Evaluation Of Wetland Ecosystem In Fu Tuan Estuary Based On RS And

Wetland is the richest ecosystem of biodiversity in nature. Estuarine wetland located in the intersection of river ecosystem and marine ecosystem, Which is formed by the interaction between land and water. It plays an important role in regulating climate, conserving water, scatting flood, cleaning up the environment and conserving the biological diversity. Fu Tuan River wetland has a large number of aquatic and terrestrial resources, and the special geographical environment has given birth to unique natural scenery. In recent years,due to industrial development, poor land reclamation, waste disposal and effects of wetland breeding around the river and wetland, Fu Tuan River wetland ecological system has been damaged, seriously affecting their ecological function.Carrying out Fu Tuan River wetland ecosystem health dynamic synthesis appraisal may provide a scientific basis for further promulgate the wetland ecosystem healthy mechanism, establishment of wetland protection and restoration mechanism and development of wetland protection and management countermeasures.This article around the theme of "Fu Tuan River wetland ecosystem health evaluation ",use RS and GIS technology, combine wetland ecosystem health and relate disciplines such as landscape ecology theory and methods, base on the pressure-state-response model, select 15 indicators of landscape metrics and socio-economic data to developing an evaluation system, use of hierarchy analysis process to determine weight, appraised the entire wetland ecosystem health. Through the research, the main conclusion includes:(1) Basing on TM image in the study area and combining the characteristics of wetland eco-system, the wetland is divided into 7 types.The article use AHP to calculate Landscape pattern indices. Result shows that there has leix transition between the plaques. Within the study area,patch density and landscape fragmentation has increased,and landscape diversity has reduced.(2) This research use the analytic hierarchy process to construct index system and confirm the index weight. In addition,it makes sure index score by mechanism model or using statistical models and expert score. And then to compute the eco-health index and the three points systems index.Comparative assessment of wetland ecosystem health standards,the result shows that in 2001, 2006, 2009 and2014 Fu Tuan River wetland ecosystem health index were 0.73, 0.64, 0.53, and 0.54,2001 and 2006 Fu Tuan River wetland is in a healthy state, 2009 and 2014 is in sub-health state;The Health of ecosystems is in accordance with the2001,2006,2014,2009 Sorting。(3) In 2001, Pressure system, State system, Response system values are 0.59,0.77 and 0.73,and Pressure system belongs to sub-health state, the State system and Response system belong to health status.In 2006, Pressure system, State system, and Response system values are 0.42, 0.63 and 0.78,and Pressure system is in sub-health status, State system and Response systems for health status.In 2009,Pressure system,State system, Response systems values respectively are 0.39, 0.52, and 0.63,Pressure systems is generally sick, State system is in sub-health state and Response system is in health status.In 2014,Pressure system, State system, Response system values are0.36, 0.51 and 0.69,Pressure system is generally sick, State system is in sub-health state,and the Response system is in the State of health.(4) To find out the main factor affecting the ecological health of Futuan River estuary wetland is the human factor, and proposed recovery strategies and measures of wetland ecosystem health.