Study On Planning Strategy Of Alejin Island Urban Wetland Park Based On Landscape Pattern Evolution

With the development of urban double repair,urban wetland plays an increasingly important role in urban ecosystem.Protecting and restoring urban wetlands is of great strategic significance for improving environmental quality and sustainable development.Since 2005,the Ministry of Housing and Urban-Rural Construction issued the "National Urban Wetland Park Management Measures"(trial implementation),urban wetland parks have gradually entered the public's vision,and construction boom has emerged in various places.However,due to the late start of planning and construction of urban wetland parks in China,and mostly based on qualitative analysis,the important role of dynamic changes and human disturbance factors in wetland ecosystem is often neglected.Therefore,it is of great significance to use information technology for quantitative analysis to guide planning and design work.From the perspective of landscape ecology,this paper uses 3S technology to construct a research system for the landscape pattern evolution of urban wetland parks,taking Alejin Island City Wetland Park as the main research object,and sets up a reference group to propose planning and design strategies.Firstly,from two aspects of urban wetland parks and landscape pattern,this paper combs and studies the related concepts and research basis,summarizes the research status and existing problems of urban wetland parks at home and abroad,and summarizes the quantitative indicators and technical means of landscape pattern evolution.Secondly,the research system of landscape pattern evolution is constructed,and the purpose and content of the system construction are clarified.At the same time,two sub-systems,including landscape classification system and landscape pattern evolution index system,are established to determine the methodology of this study.This study takes Alejin Island City Wetland Park as the experimental group(which has not yet completed the development and construction),and Sun Island National Wetland Park and Jinhewan Wetland Botanical Garden as the reference group(which has completed the development and construction).According to the relevant norms,the landscape classification system of Harbin City Wetland Park was established,and the research objects were classified by using 3S technology in four periods: 1995,2005,2015 and 2018.At the same time,the results were checked and corrected.On this basis,landscape type transformation and landscape scale level,patch type scale level of landscape pattern index analysis.At the same time,the correlation between landscape pattern index at patch scale level and human disturbance factors was analyzed.Finally,according to the above quantitative analysis results and construction status,the planning and design strategies of Alejin Island in the experimental group are put forward from two directions of different wetland landscape and different human disturbance factors.At the same time,it can provide reference for the future development and construction of Harbin City Wetland Park.