Landscape effect analysis of land consolidation using GIS
Land consolidation plays an important role in promoting rational land use and improving ecological environments. It produces the changes of land uses and their spatial structure to result in the changes of landscape pattern and ecological effects. Therefore, it is very important for planning and designing eco-environmental evaluation of land consolidation so as to study its landscape-ecological effects. Taking Huairou District in Beijing as an example, the changes of land use structure and landscape patterns for land consolidation are analyzed using GIS combined with method of landscape ecology in this paper. The following conclusions are drawn. The land consolidation converts most of other land uses into cultivated land, whose area is more than 70% of the project area. In this process, most of the unused land was transformed into the cultivated land, some forest land was changed into cultivated land. Whereas residential and industrial areas changed indistinctively. The number of land use patches and their density decreased by over 50%, the areas of average patch, the largest patch and the least patch increased 1. 2, 0. 4 and 79 times compared with those before land consolidation. However, the patch variance coefficient reduced by 24. 18%. In the whole landscape, the land use patches became simple and regular, landscape edge density, shape index and splitting index decreased over 29% , whereas aggregation index slightly increased, when land consolidation has been finished. Land consolidation reduces landscape fragmentation. At the same time, it also causes decrease of landscape diversity. The Shannon's and Simpson's diversity index and evenness index reduce over 30%. Based on the characteristics of land consolidation and results of the previous researchers, the common 10 indexes of landscape effect analysis including patch level and landscape level are summarized.
land consolidationlandscape ecologyindex of landscape effectsGIS
NETL
NSTL
万方数据
维普
