Research On Landscape Evaluation Of Aquatic Plants And Ecological Restoration Design Of Xinjin Baihetan National Wetland Park Based On GST-AHP Method

Aquatic plants are one of the important elements in the construction of wetland park ecosystems and landscapes.They not only have landscape value,but also have the functions of maintaining wetland ecological balance and purifying water quality.In recent years,with the increasing urban population,the ecological problems in the national wetland parks around the city have become increasingly prominent,and the rational allocation of aquatic plants in the national wetland parks has become more and more important.This paper applies the knowledge of garden botany,landscape science,restoration ecology and other disciplines to investigate the species of aquatic plants in Baihetan National Wetland Park in Xinjin,Sichuan,and conduct a comprehensive evaluation of the aquatic plant landscape.At the same time,the technical means of ecological restoration are used to Improve the quality of aquatic plant landscapes in national wetland parks and promote the sustainable development of wetland habitats.The main findings are as follows:(1)59 species of aquatic plants belonging to 39 families and 55 genera have been used in Xinjin Baihetan National Wetland Park,including 27 species of emergent plants,6 species of floating plants,4 species of floating plants,8 species of submerged plants and 14 species of hygrophytes.The configuration mode of aquatic plants in the park is mostly emergent water-submerged water-wet herbs.(2)Through the calculation of various impact index factors by the GST-AHP method and the investigation and analysis of 20 sample sites on site,the characteristics of the aquatic plant community in Xinjin Baihetan National Wetland Park are as follows:on the landscape level,the weight value of the aquatic plant landscape temporal diversity is the highest,0.1449.Compared with the seasonal landscape,the color can show the effect of different seasons.The whole park uses the natural revetment treatment method,which is tortuous and beautiful,But the form is relatively simple;On the ecological level,the weight value of diversity of aquatic plant life form structure is the lowest,which is 0.0466.No sample plot in the park has five life forms at the same time: emergent floating leaf submerged floating wet life;At the recreational level,the accessibility of aquatic plant landscape space is good,but the park lacks the application of hydrophilic platforms,so the aquatic plant landscape has a weak staying ability.(3)Based on the optimization goal of aquatic plant landscape of Xinjin Baihetan National Wetland Park for ecological restoration,the "IEVME Strategy" for ecological restoration of wetland park was proposed.The ecological restoration design of aquatic plant sample plots was carried out from the three levels of landscape,ecology and recreation,and the configuration mode of different types of aquatic plant communities was summarized.The multi belt plant buffer zone and flood control weir cascade depression ecological restoration cycle system were adopted this time,It can form diversified biological communities,enhance the absorption capacity of organic minerals and nutrients,promote the biological purification process,repair the overall ecosystem of Xinjin Baihetan National Wetland Park,and further enhance the ecological benefits of the park.