Study On The Land Use Change Of Mengyin County

This paper has chosen MengYin county which is located in the heart of yimeng mountain area as the study area, based on TM images in 1987, 1997 and 2007,and geographic information system's strong spatial analysis function, using the mathematical statistics and model technique for comparing the data of system analysis and processing, have been full consideration of ecological environment, the unique natural and social economy, from multiple levels on the comprehensive analysis on the 1987-2007 the spatial and temporal variation characteristics of land use, provides the typical case analysis of the land use change for yimeng mountain area, the main results are as follows:1 The land use spatial and temporal variation of MengYin county is illustrated.â‘ Cultivated land and forest land column major order land use of MengYin county .In 2007 MengYin county cultivated area is 607.47 km2 , the 37.31% of total land area, forest land is 574.93 km2 , 35.39%, the two together account 72.70%. grass is 256.30 km2 , 15.91%, construction land is 86.94 km2 , water is 71.16km2, 4.42% adorn the forest land, cultivated land, unused land 14.06 km2 , 0.87%.â‘¡From the time, land use changes significantly during 20 years, forest land and construction land increase, others decrease. From the change of the quantity, the most significant is increase of forest land and decrease of grassland and cultivated land. From the land use dynamic, the unused land is biggest, followed by construction ,from land use dynamic for view, the land use change in abate. In 1987, 1997, 2007, land utilization gain high degree , From the perspective of land utilization degree index, 1987-1997, land use is in a recession, 1997-2007, land use is in development time.â‘¢From the space, each type of land use change has a dramatic spatial distribution .This changes are forest land and construction land increased and the other land decreased ,cultivated land was mainly developed for forest land and construction land. but such a complex interaction between conversions. In Arising Tupu , the largest unit in a new map series is forest land , followed is cultivated land. In declining Tupu , the largest unit in a new map series is cultivated land. followed is forest land, which was mainly developed for cultivated land and water land ,thirdly is grass land ,construction developed little , other land use less.â‘£From the landscape pattern index , the perspective of human activity have obvious influence to landscape diversity . In Study period, the number of plaques showing an overall increase ; the largest proportion of plaque area decreased gradually, patch density decrease prove a serious landscape fragmentation in the study period; from the whole, shapes tend to complex and irregular; Shannon diversity index and Shannon evenness index in the study period show increasing trend show that because of human activities , landscape types trend to balance.2. Reveals the driving mechanism of cultivated land change of Mengyin CountyThrough the force qualitative analysis and principal component analysis of cultivated land change in MengYin county, we can see:Development and change of cultivated land is affected by natural and man-made social, economic and other factors, showing complicated process. Factors which drive cultivated land change of MengYin county has three:â‘ total economic growth, refers to the economic development of GDP, agriculture, which is main factor influence cultivated land.â‘¡Economical development factors, refers to the total population, urbanization and the social investment in fixed assets, and rural per capita income.â‘¢Agricultural science and technology progress which is reflected in the per capita share of grain reaction.3. Predicate the dynamic change trends of land use in Mengyin County and the sustainable use of policies.The results of calculation using the Markov chain model and GM(1,1) model indicate that the land use and land cover pattern is changing. Cultivated land, Grass land ,Water land and The unused land will keep on decreasing, however the area of Forest land and construction land will continue to increase. Forest land increases most. From the overall change trend of change of land use, the land use trend of the study area is not good for the ecological environment. The land use and land cover pattern can be adjusted. Because MengYin county belongs to the ecological environment ,the environmental capacity fragile areas, and human activities, especially difficult to maintain its stability. So in economic development, must pay attention to protect the ecological environment, go to the harmonious and sustainable development.