Assessment of wetland ecosystem health in Irtysh river

According to the characters of Irtysh River Basin wetland ecosystem,we established a ecosystem health assessment system including 11 indices based on PSR model. In this study,based on remote data and statistical monitoring data,combined with analytic hierarchy process( AHP) and fuzzy mathematics comprehensive evaluation model,Irtysh river basin wetland ecosystem was assessed comprehensively. At the same time,the pressure they faced,the state and the response of its pressure were analyzed. The study shows that Irtysh River Basin wetland ecosystem is in a healthy state and the result of its comprehensive assessment is 0. 8088. According to the judgment principle of membership degree evaluation matrix,pressure and response are in a very healthy range and the state is in a healthy range. The main restricting factors of wetland health are natural factors,such as low vegetation coverage rate,larger precipitation changes and so on.