Landscape Degradation Assessment Of Tai'an City Under The Influence Of Human Activities

The landscape is a complex of land and objects on the land.Based on the closeness of the land and people's lives,the landscape is also affected by human activities.With the rapid development of the economy and the steady progress of urbanization,human activities have brought more negative impacts to the landscape environment.Based on this,the evaluation of landscape degradation and the targeted improvement of the landscape environment will be of great significance for social production and life.Current land degradation studies consider the interaction between human activities and natural habitat vulnerability.Because natural habitat vulnerability is an inherent property of the land itself,most of the degradation assessment models have repeated calculations of natural habitat vulnerability indicators.question.This paper reconstructs the model to better reflect the impact of the interaction of human activities and natural habitat vulnerability on landscape degradation.The paper comprehensively reviews the related researches on landscape degradation evaluation at home and abroad.Based on the theory of sustainable development,landscape ecology theory and restoration ecology theory,the landscape degradation evaluation model is reconstructed;through literature review,authoritative department data collection and Field surveys,etc.,obtain relevant indicator data,remote sensing image data and geographic information data of the study area.The application of 3S technology to integrate multi-source data will complete the evaluation of landscape degradation in Tai'an City and provide a scientific basis for landscape construction in Tai'an City.The main findings are as follows:(1)A semi-quantitative landscape degradation evaluation model based on the equation L_D=(?KI)/V is constructed,which highlights the impact of human activities on landscape degradation based on the assessment of natural habitat vulnerability.(2)Loss of forest area,pesticides,scrapping points,waste dumps in car scrappage points and the number of garbage dumps,construction land area,industrial and mining land area,population density of physiology,artificial impervious surface area,the length of rural roads,collecting of endangered species and forest fragmentation 12 indexes such as calculating the cumulative impact of human activity index,index influence intensity index is divided into four grades,identified the intensity of the impact of human activities on Tai'an City various counties urban district.(3)Five indicators including slope,altitude,slope direction,soil and vegetation density of each evaluation unit were selected to calculate the habitat vulnerability index of each county in Tai'an City.Soil of vulnerability is most significantly,the amplitude of vulnerability index in(1.4,2.6),vegetation density Tai'an City vulnerability to tai shan district,daiyue district,the ningyang county and dongping county is serious,Tai'an City vulnerability grade especially in ningyang county,Tai'an City slope vulnerability to the ningyang county for strong,highlighted Tai'an City elevation vulnerability to tai shan district.In order to highlight the influence of human activities on landscape degradation accumulation,weakening the vulnerability of natural habitat,the average regional vulnerability index,the results show that the mean of the regional overall vulnerability index value differ not quite,daiyue 1.9,maximum minimum tai shan district,xintai city,as well as the ningyang county of1.7.(4)In the six counties and districts of Tai'an City,the landscape degradation in ningyang county and dongping county is not serious,which is a mild degradation area;Taishan is a moderately degraded area.The landscape degradation of daiyue district,xintai city and feicheng city is very serious.The area of Tai'an City with mild degradation is 2,465 square kilometers,accounting for 32%of the total area.The area with moderate degradation is 337square kilometers,accounting for 4%of the total area.The area with severe degradation is4,960 square kilometers,accounting for 64%of the total area.(5)In view of the three severely degraded areas of daiyue district,xintai city and feicheng city,this study puts forward specific Suggestions on six aspects,including population pressure,urbanization process,highway construction,protection of endangered species,use of pesticides and reclamation of abandoned industrial and mining land.