Study On Landscape Health Assessment Of Tangxi River Wetland Park In Hefei City

Wetland parks in fast-growing cities have declined significantly.As the adverse effects of human activities on the biosphere become more and more serious,urban health is facing a huge threat.People gradually realize the importance of "landscape health".Landscape health of urban wetland parks is particularly important in urban ecological health.The study on landscape health assessment of wetland parks in China is still in its infancy and lacks systematic scientific theoretical and practical guidance.Therefore,it is urgent to establish a relatively perfect comprehensive evaluation system to guide its construction and management.Based on the theory of landscape ecology,this paper firstly summarizes the research status of wetland parks and landscape health at home and abroad from the perspective of the concept of wetland,which is the theoretical basis of the study.With ArcGIS technology as the means of data acquisition,using AHP analytic hierarchy process,Delphi method,Pearson correlation analysis as the basic analysis methods,from the perspective of landscape structure,ecological environment and society.According to Saaty's nine-level scale method,a judgment matrix is constructed to calculate the weights of the indicators.Finally,a landscape health evaluation system is established.Finally,taking Tangxi River Wetland Park in Hefei as an example,the study shows that:(1)Based on the three parts of landscape structure,ecological environment and socio-economic value,the landscape health index system of urban wetland parks was established(1 target layer,3 index system layer and 19 factor layer).,determining 5 grades from very stable to extremely dangerous:very stable type ?(0.9 ? N<1),more stable type ?(0.7 ? N<0.9),unstable type ?(0.5 ? N<0.7),endangered Type ?(0.3? N<0.5),extremely dangerous type ?(0 ? N<0.3);(2)The landscape structure index score of Tangxi River Wetland Park is 0.711,which is in the basic health state.The overall landscape structure is reasonable.In the later stage,it is necessary to adjust and control the current situation of thinning forests,water body,grassland,road and square plant community composition and other related indicators reasonably;(3)The ecological environment index score is 0.684,which is in an unstable state and there are unhealthy hidden dangers.This indicates that Tangxi River Park needs to improve infrastructure,improve water quality and aquatic plant species,vegetation coverage and soil conditions,and further optimize the ecological and environmental benefits of the landscape;(4)The score of social and economic indicators is 0.660,which is in a sub-health state.It is necessary to strengthen the social,economic and cultural functions of wetland park landscape through appropriate artificial interference,so as to enhance its social and economic value;(5)The score of the three comprehensive indicators is 0.697,which is between stable and unstable,and the landscape health is sub-healthy.This paper further summarizes the problems existing in Tangxi River Wetland Park,and puts forward relevant methods and measures to improve the health of Tangxi River Wetland Park.