Research On The Planning Ecological Security Pattern In Townships Under Hilly Terrain Conditions

The continuous advancement of urbanization has made the scale of urban construction land expand rapidly.Rapidly changing land use patterns have broken the original stable landscape pattern,which puts the ecological environment under tremendous pressure,so that problems are frequent.The conflict between social development and the natural environment has intensified.The ecological security pattern ensures the integrity of regional system structures and ecological processes by delineating and protecting key ecological elements,to achieve the control and improvement of ecological and environmental issues.However,the connotation,constituent elements and construction methods of the current ecological secur ity pattern have not yet been unified.The study area is also concentrated in plain cities,and the exploration of special terrain areas such as hills is still deficient.In view of the above problems,this paper systematically sorts out the theoretical system of ecological security pattern and explores a method for constructing the ecological security pattern of townships under hilly conditions.In-depth research on scientific theories and related cases with similar connotations such as ecological security patterns,ecological networks and green infrastructure at domestic and foreign.On the basis of clarifying its definitions,elements,concerns and construction methods,the urban growth boundary is included in the ecological security pattern.From the perspectives of natural ecological background,economic development and ecological exchange process,integrate ecological sensitivity,land suitability and landscape connectivity into the scope of ecological safety assessment.Using the “comprehensive evaluation of ecological security—construction of resistance surface—discrimination of ecological safety pattern components” model as a method for constructing an ecological security pattern in a township under hilly conditions.Specifically analyze the ecological environment characteristics of hilly terrain,combining the particularities of hills.The importance of ecological patch obtained from the comprehensive landscape connectivity evaluation is obtained as a comprehensive evaluation result of ecological security as the basis for ecological source selection.Delineate of the ecological resistance coefficient by land use type.And select the elevation factor with the greatest influence under the hilly terrain to correct it.Using the least cumulative resistance model to discriminate component,completing the construction of an ecological security pattern.In this paper,using the above theoretical system and technical methods,taking Hu'an Town of Guang'an City as an example,the application practice research is carried out.