The Study Of Land Use Change And Its Driving Force In Zheng Zhou's Urbanization

The rapid development of urbanization in China has affected the structure and function of regional ecosystems and affected the urban land security.At present,the city of Zhengzhou is in the period of rapid urbanization.The impact of human activities on the natural environment is becoming more and more obvious.The land cover situation changes drastically,and its ecological problems are becoming more and more prominent.There are land degradation,environmental pollution,vegetation destruction,acid rain hazard and so on.Series of ecological and environmental problems.This paper studies the temporal and spatial characteristics of land use change in Zhengzhou City,and puts forward the existing problems and suggestions of land use in Zhengzhou.Based on RS and GIS technology,the TM remote sensing images of Zhengzhou City in 1988,2001 and 2016 were processed by ENVI4.8 software,and the land use classification system which could meet the research needs was established and classified and supervised by unsupervised Classification method,the remote sensing image is interpreted and interpreted,and the land use type area transfer matrix is generated according to the result of remote sensing interpretation.The land use change data were vectorized and the land use change information of Zhengzhou City was extracted by using ArcGIS software.The land use data were obtained and the land use change model was used synthetically to analyze the characteristics of land use change in Zhengzhou.The model of gravity center is used to analyze the change of gravity center of land use in Zhengzhou.According to the land use change data,the Markov model was used to forecast the land use change status in Zhengzhou City in 2031.Based on the analysis of land use change,this paper analyzes the driving mechanism of land use change in Zhengzhou City by qualitative and quantitative methods.First,the qualitative analysis of natural factors and socioeconomic factors is carried out.Secondly,the driving factor index is selected and the socioeconomic factors are quantitatively studied by using the principal component analysis method using SPSS software.According to the analysis results and actual situation of land use change in Zhengzhou City,the existing problems and suggestions in the process of land use change in Zhengzhou are put forward.Specific conclusions are as follows:(1)From 1988 to 2016,the main trend of land use change in Zhengzhou was a significant increase in construction land.The area of cultivated land,water and unused land decreased significantly,and the area of forest land decreased first and then increased.From 1988 to 2016,the land use of Zhengzhou City was more and more disturbed by human disturbance,and the speed of change was accelerating.The growth rate of construction land is the fastest,the rate of reduction of cultivated land and water is getting faster and faster,and the rate of unused land is slowed down,and the forest land is decreasing first,but the decrease is faster than the increase rate.From the point of view of land use,the land use index of Zhengzhou City is increasing,and the land use change in Zhengzhou is in the development period,and the development speed is faster.From the land type conversion in Zhengzhou City,the land use types of Zhengzhou are all involved Transformation,but the transformation of arable land and construction land is obvious,the land for construction land is mainly cultivated land,which is the main land use type in Zhengzhou city.(2)The trajectories of the center of gravity of the land use type can be seen.In the period from 1988 to 2016,the cultivated land center of Zhengzhou was shifted to the northeast,and the center of gravity of the forest land shifted to the northwest.The center of gravity of the waters is shifted to the northwest,and the center of gravity of the construction land is finally shifted to the southeast direction.The center of gravity of the unused land is finally shifted to the northwest direction,and the center of gravity is obviously changed.(3)Based on the land use change analysis,based on the land use area transfer matrix,the land use change trend of Zhengzhou City in 2031 was predicted by Markov model.The cultivated land,forest land,water area and unused land area of Zhengzhou City in 2031 The trend of construction land is increasing,and in the future period,the reduction of cultivated land area and the expansion of construction land area are still the biggest contradiction of land use in Zhengzhou.(4)Through the analysis of the driving factors of Zhengzhou,it is concluded that the population factor,economic development and scientific and technological progress are the internal driving force of land use change in Zhengzhou.The results of principal component analysis show that the population,economic development factors,agricultural output and scientific and technological progress are the main driving factors of land use change in Zhengzhou,and the influence of these social and economic factors on land use change in Zhengzhou is enhanced.