Studies On Landscape Planning And Design Along Yellow River In Zhengzhou City Based On Landscape Security Pattern

The coastal area of the Yellow River is an important ecological space and an ecological barrier for cities along the Yellow River.With the rapid development of urbanization,the space along the Yellow River has gradually become a conflict area of ecological protection,development and utilization.Excessive human interference and modernization construction have led to a sharp decline in the ecological quality of the regions along the Yellow River.The problems,such as the reduction of biodiversity and wetland area and the fragmentation of landscape,have seriously threatened the urban ecological health and the sustainable development of rivers.According to the requirements of ecological protection and high-quality development in the Yellow River Basin,it is of significance for urban ecological development,industrial structure optimization and regional sustainable development to reasonably coordinate the controversial relationship between ecological protection,development and utilization,and strengthen regional ecological restoration and function development.In this paper,taking the region along the Yellow River in Zhengzhou as an example and the landscape ecology as the guiding ideology,through the investigation and analysis of the status and the analysis of landscape pattern,it can be concluded that there are some problems in the region along the Yellow River in Zhengzhou,such as high spatial differentiation of forest land,wetland degradation,weak ecological service function,and large degree of human intervention.Then the resistance surface was determined with the help of GIS spatial analysis technology,the superposition of ecological source and multi-resistance factors in the region along the Yellow River.The minimum consumption distance model is constructed which is combined with hydrological analysis to analyze the ecological structure of the study site.In this regard,the spatial position of ecological factors such as ecological corridors,ecological nodes and ecological breakpoints in the study area are simulated.According to the status of ecological structure,the author proposes the strategies such as protecting existing ecological sources and ecological nodes,improving corridors and optimizing ecological breakpoints.Finally,according to the status of ecological environment along the Yellow River and the spatial position of ecological structure,the landscape planning scheme of the study area is determined.The main research contents and conclusions are as follows:(1)There are obvious differences in the landscape pattern of each section along the Yellow River in Zhengzhou.The maximum combination index in the western region is 98.9366,and the forest land plaque is dominant,and the plaque area ratio is 51.0149.The landscape types in the central region are complex,and the maximum patch index is only 4.5856,while the landscape segmentation and separation indexes are 0.9876 and 80.5667,respectively,which are the largest in the same index in the three regions.The largest patch index in the eastern region is 28.0089,and agricultural land is dominant.The largest patch ratio of farmland area is 57.9103 in the same index in the three regions.The landscape segmentation and separation indexes are the minimum values of the same index in each region,0.8874 and 8.8837,respectively.(2)The high connectivity area of landscape patches along the Yellow River in Zhengzhou is mainly concentrated in the western Mangshan area,and the proportion of extremely important patches is 70%.The dI values of the first three important patches are 58.82,56.31 and 17.35,respectively.(3)In the process of ecological structure identification,76 ecological sources are identified.The 189 ecological corridors are mainly distributed in areas with good ecological environment such as woodland,grotto temple,Taohuayu and other ecological scenic spots with high coverage around villages such as Mayugou Village and Yangling Village in the west.There are 72 ecological nodes,which are mainly distributed in Zhangling Village,Yangling Village,Taohuayu Tourism Area,Yellow River Scenic Area and some beach areas.The scheme makes guidance for the landscape planning of the region along the Yellow River in Zhengzhou from three aspects:overall layout,planning of key projects in sub-district and special design.The overall layout aims at the connection and optimization of corridors along the Yellow River,mainly reflecting the construction of ecological corridors along the Yellow River in Zhengzhou from the aspects of building national greenways,natural landscape corridors,cultural landscape corridors,and biodiversity corridors;the planning of key projects in sub-district is mainly aimed at the different landforms and regional functions along the Yellow River to build a regional construction with the theme of western forest ecological rehabilitation,central wetland ecological restoration and eastern pastoral ecological experience;the special design mainly enhances the landscape heterogeneity and ecological stability of the Yellow River region from the aspects of plant distribution,waterfront revetment and infrastructure distribution.A sustainable development path based on ecological security and ecological restoration is explored for the landscape planning of the Yellow River region through the relevant theories of ecological planning which creates a city-river blending space integrating ecology,culture,leisure and industry,to providing references for the landscape planning of other cities along the Yellow River.