Study On Land Use Change And Its Landscape Patterns In The Mountains

Along with the economic development and social progress of land utilization, the landscape pattern of land use have notable changed, and also puts forward a higher request in land use planning.research and land use status of optimized configuration before, often taken much attention on land use type of quantity and ignored the spatial pattern of land use change on ecological processes. The land use planning should take account of economic, social and ecological benefits, and keeps the sustainable utilization of land resources, but how to evaluate the implementation of land use planning on the evolution of landscape patterns and ecological environment, it is still a difficult problem. Combined with the geography of the ideological thoughts and ecology, the landscape ecology provided of the theoretical to solve the problem.Take the central mountainous city in fujian province YongAn landscape pattern for the research target, in using remote sensing (RS), geographic in formation system (GIS) and Fragstats technology, on the basis of YongAn with land use status and planning at the end of the landscape pattern as the research object, analysis the landscape features and landscape pattern in YongAn, and quantitative description of the landscape pattern of evolution laws in YongAn.Studies suggest that overall landscape pattern mainly controled by the natural conditions.landscape fragmentation degree is not high, and most of the relative shape of patch has some complex characteristics;And has high landscape diversity, forest landscape has high cvenncss, each type of patches have high contagin index, landscape in the spatial distribution showing inequalization. Forest landscape have been matrix of the holistic landscape, Control ecology processes of this area, but the area of forest will drop and forest landscape fragmentation will increase by 2020.The largest landscape is forest landscape,the smallest is the unutilized land, Arable land landscape′s fragmentation is highest, with complicated shape. Forest landscape controled by large patches,without much destructivene;Urban construction landscape present disperses state due to human interference.According to the plan, the influence of human activities on the landscape pattern is limited. In 2020, for the holistic landscape, Patches, contagion index and the diversity index decline, landscape fragmentation degree of holistic landscape slightly decline;Patch types evnness diminish, the forest landscape dominance decline.For each type of patch, the largest is still forest landscape, other patches are minor. Because of yongan located in the mountains.the area of cultivated land, orchard, forest landand the waters and other natural landscape area has different rate reduced. Area of residential settlements and industry increased quickly. The shape index of forest increased slightly, and shape is complicated. But other patches shape index declined, and shape is simple.Compared land use planning with landscape pattern by 2005 and 2020, nature landscape change slowly and artificial landscape construction dramatic changes. For landscape area of each type, forst reduce most, and then cultivated land. But residential settlements and industry increases quickly, and other patches be disturbed relatively small.For landscape-level index, from 2005 to 2020, landscape fragmentation slightly increased, the landscape diversity index and evenness index have little change by 2020, It shows yongan Maintain good landscape structure on diversity, The landscape heterogeneity degree increased, types of plaques area ratio narrowed differences. The allocation of landscape components tends to even, Landscape structure affect greatly by human activities. But human interference not caused composition of the landscape elements large disappear, only make them redistribution. Fractal dimension index of holistic landscape tends to decrease, that`s in the period, With the increase of human activities, On one hand, proportion of artificial landscape is increased, on the other hand, arable land is occupied and consolidation, and lower dimensions of landscape, Economy, population and policy factors is the main reason of landscape pattern changes.Based on the landscape pattern analysis In two times, using principal component and cluster analysis to get a set of landscape pattern index system, which summary to YongAn landscape pattern and reduce redundant information, and landscape ecological division. Comparative and analysis land use zoning and land use of landscape partition in 2005, they have remarkable mapping relation. Use index system of landscape division, Obtain the land use landscape division in 2020. It inferred that land use is basically similar with landscape pattern division. It can ensure the optimization of landscape pattern and Sustainable use of land in YongAn.