Research On Natural Ecological Spatial Planning In Pearl River Delta

Analyzing the natural ecological space and ecological process of urban agglomeration and interpreting the ecological relationship of urban agglomeration are to optimize the development pattern of land and space,ensure ecological security of urban agglomeration and maintain biodiversity.It is of academic value and practical significance to ensure the safety of water environment and other basic scientific problems in ecological construction.The research contents of this paper are as follows:(1)combing the related concepts and connotations of urban agglomeration,ecological space,ecological process and naturalness,and discussing the research progress and conclusions of ecological space planning at home and abroad.The main ecosystem and ecological environment characteristics of the Pearl River Delta are discussed,and the ecological and environmental problems facing the development of the urban agglomeration in the Pearl River Delta are analyzed.This paper provides the basis for the research work in this paper.(3)using ecological sensitivity,natural degree and other analytical methods,this paper systematically studies the quantity,scale and space of the natural ecological patches in the urban agglomeration of the Pearl River Delta.The ecological processes and ecological relationships in the Pearl River Delta are studied by using the ecological flow analysis method of landscape ecology.The number and scale of ecological corridors and ecological nodes in the Pearl River Delta urban agglomeration are proposed systematically.Based on the systematic study of the natural ecological patches in the Pearl River Delta(spatial,ecological processes and ecological relationships),The natural ecological spatial system of Pearl River Delta is constructed,which consists of 262 ecological source patches and 49 ecological corridors and 32 ecological nodes.Among them,the ecological source patch area is32200 square kilometers,occupying the land area of the Pearl River Delta.The main functions of ecological source patches are to ensure the ecological security of the Pearl River Delta urban agglomeration,and to maintain biodiversity,and the main functions of the ecological source patches include forest patches,farmland patches,water wetland patches and urban green patches,the main functions of which are to ensure the ecological security of the Pearl River Delta urban agglomeration.It is the basic ecological barrier of urban agglomeration.The ecological corridor includes 13 mountain corridors,13 river corridors,1 coastal shelterbelt corridor,21 biological corridors and road corridors.Its main function is to maintain the continuity of ecological relations and the integrity of natural ecological processes in the Pearl River Delta.Ecological node is the key to the construction and restoration of ecological patches and corridors.The discontinuous region and discontinuity point include 8patch ecological nodes and 24 corridor ecological nodes.The natural eco-spatial system of Pearl River Delta urban agglomeration is constructed from 262 ecological source patches(including 8 ecological nodes and 49 ecological corridors that need to be constructed and repaired),including 24 ecological nodes that need to be built and repaired.The natural ecological space is stratified and the ecological relationship is strong,which not only accords with the landscape spatial structure model of landscape ecology,such as "patch,corridor and matrix",but also fits the demand of the development of urban agglomeration in the Pearl River Delta.Pearl River Delta is a scientific and reasonable natural ecological space model.The innovation point of this paper is to study the spatial,ecological and natural attributes of natural ecological plaque and ecological flow in urban agglomerations by using quantitative and qualitative research methods.The natural ecological processes and ecological relationships of urban agglomerations are interpreted,and the natural eco-spatial model of the urban agglomerations in the Pearl River Delta is constructed.