Research On The Method Of Digital Designing Nature-approximating Plant Community In Urban Forest

At present,the construction of urban forest in China is at the climax stage.While Miyawaki method has been frequently put into practice in some areas at home and abroad,also promoted the construction of urban forest change from "increment" to "quality improvement".In addition,the application of digital technology in landscape architecture design is gradually rising.In the construction process of natureapproximating plant community of urban forest,the intervention of digital technology could improve its scientificity,efficiency and flexibility of design.Therefore,the study takes Miyawaki method as the practice foundation,mainly based on the theory of nature-approximating forestry,potential natural vegetation and new succession theory,integrating theories of forestry,plant ecology and landscape architecture,innovatively integrates digital technology and Miyawaki method in the research content,explores the digital design of nature-approximating plant community in urban forest,establishes a set of relatively complete digital design method of natureapproximating plant community in urban forest,and takes Xingtai Forest of Xiong’an Green Expo Garden as an example.The method can be divided into three steps: 1)cognition,investigating and mapping potential natural vegetation,extracting natural community characteristics and determinating key parameters of community by representative plot method,;2)simulation,simulating natural community and constructing target community.Firstly,dividing the space of the target community.Then,dividing the sunlight and soil moisture conditions of the plant habitat based on grasshopper and other related plug-ins.Next,dividing the community patches,designing the specific model of the target community and determing the specific parameters of the community.Finally,carrying out the digital generation,the grasshopper battery pack and python algorithm are constructed before.After substituting the key parameter values,the planting design drawings and relevant seedling information are automatically generated,and the digital design results of nature-approximating plant community in urban forest could be obtained after verification;3)construction,constructing the model of target community based on BIM platform,and then carrying the digital construction and management and protection.This study combine the digital technology with the classical theory innovatively.The establishment of digital design method of nature-approximating plant community in urban forest promotes the scientific and efficient construction of urban forest,so as to produce ecological,social,landscape,economic and other benefits.