Study On Ecological Benefit Of Lueyang County Based On Land Use Change

With the continuous acceleration of China’s socio-economic development and the continuous progress of science and technology,human intervention in land-use patterns has been increasingly intensified.Land use change caused by human activities has broken the original stability of the ecosystem.With the change of land use mode,the ecosystem service function of all kinds of land changes,which makes the ecosystem service value of all kinds of land change in time and space.This paper takes Lueyang County as the research area,Based on the land use data and relevant information in 2007,2012 and 2017,Using the research methods of land use transfer matrix,dynamic degree of land use change and comprehensive index of land use degree,this paper reveals the law of land use evolution from three aspects of land use type change,speed change and intensity change.On this basis,the evaluation model of ecosystem service value is constructed by referring to the table of service value equivalent of China’s terrestrial ecosystem compiled by Xie Gaodi.The spatial-temporal evolution and spatial distribution pattern of ecosystem service value were analyzed by combining the contribution coefficient of ecosystem service value and GETIS ordgi * index.The sensitivity of the research results,the verification of landscape pattern and the correlation between land use and ecosystem service value were analyzed.Finally,Markov model is used to predict the value of ecosystem services in 2022,and according to the change of the value of ecosystem services in Lueyang County,combined with the actual situation of the county,reasonable suggestions are put forward.The results are as follows:(1)In the study area,the construction land area continued to increase,the forest land area continued to decrease,the cultivated land area first decreased and then increased,the water area and unused land area first increased and then decreased,and the grassland area first decreased and then remained unchanged.The change of land use type is more significant..From the single dynamic degree of land use change,construction land is always the land type with the largest change range.the dynamic degree of comprehensive land use change gradually increases.(2)The total value of ecosystem services in the study area is decreasing.During the study period,the ecosystem service value of Xingzhou sub district office was the highest,and that of hengxianhe sub district office was the lowest.Water area land contributes the most to ecosystem service value of Lueyang County,and unused land is the least.The contribution value of different single function services is different.The hot spots of ecological service value are concentrated in the northeast region,and the cold spots are distributed in the northwest and southwest regions with Xujiaping town as the core.(3)The Markov model is used to simulate the land use change in the study area,and the feasibility of the model is verified.On this basis,the ecosystem service value of Lueyang County in 2022 is predicted,and the result shows a downward trend.