Spatial Structure And Comprehensive Evaluation Analysis Of Small Suburban Wetland Landscape In Hefei

Small wetlands have various functions such as water purification,climate regulation,plant and animal protection,etc.It is important to study small wetlands in depth,but there are few studies on small wetlands at home and abroad,so a relatively complete comprehensive evaluation system is needed to guide their construction and management.In this thesis,the micro and small wetland samples in the suburban park Tangxi River Wetland Park and Binhu National Forest Park are used as the research objects of this thesis,based on the theory of landscape ecology,Arcgis 10.5 and Fragstats 4.2 software are used as technical means to obtain data and analyse the landscape spatial index,and the micro-wetland samples with better landscape spatial structure in the two parks are selected through analysis,and then use AHP hierarchical analysis and Pearson correlation analysis were used as analytical methods to construct index systems from water bodies,soils,plants,landscape structure and landscape aesthetics,and finally a comprehensive evaluation system for the ecological quality of micro and small wetland landscapes was established to assess the screened micro and small wetland samples,and the relevant research results showed that:(1)The scores of water body indicators in the sample plots 1,3 and 4 of the Tangxi River Wetland Park and the sample plots 2 and 3 of the Binhu National Forest Park were3.22,1,1.74,3.67 and 3.33 respectively,while the scores of soil indicators were 2.87,3.32,3.17,2.75 and 2.96.Some of the sample plots scored in Class Ⅲ and IV standards,and there is a need to control the nitrogen and phosphorus content and COD content of water bodies,strengthen water pollution control and improve soil conditions in the later stage.In the future,there is a need to control the nitrogen and phosphorus content and COD content of water bodies,strengthen water pollution control and improve soil conditions.(2)The plant index scores were 3.10,3.45,3.07,2.82 and 3.67 respectively,with some of the plots scoring at level Ⅲ.There is a need to increase the number of plants,enrich the variety of plants and improve their ornamental value at a later stage.(3)The landscape structure indicators scored 2.79,2.89,3.52,2.56 and 3.48 respectively,with some of the sample plots scoring at Level Ⅲ and requiring later moderation for the patch indicators.(4)The scores for the aesthetic landscape indicators are 4.5,4.1,3.4,4.4 and 3.9respectively,with the sample plots scoring at Levels I and Ⅱ.Further coordination between landscape elements and their surroundings is required at a later stage.(5)In terms of comprehensive scores,there are small and micro wetland samples 1of Tangxihe Wetland Park and 2 and 3 of Binhu National Forest Park,and there are 3 and4 of Tangxihe Wetland Park at the level of Grade Ⅲ.The small and micro wetland samples with high comprehensive scores in the two parks are promoted as typical samples to guide the management and construction of small and micro wetlands in Hefei City.As for the existing problems,it is necessary to further summarize the existing problems and put forward suggestions and measures to improve them.