Analysis and evaluations of land use pattern on the temporal and spatial dynamic variations in Chuanjiang Basin
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Abstract:
Chuanjiang Basin is not only an economic core zone of the Yangtze River upstream, but also an important part of the Country’s Western Development. Changes of land use in valley will contribute to optimize the land use structure, to construct the ecological shelter zone and to protect the habitat of downstream watershed. Based on the land use data in 2000, 2005 and 2013, by using ArcGIS software and other statistical methods, this paper analyzed the characteristics of land use pattern on the space-time dynamic changes in Chuanjiang Basin and made evaluation by the normalized difference vegetation index analysis. The results showed that there were conspicuous differentiation characteristics of the land-use types in spatial scale and component. The land use comprehensive dynamic changes was 0.83 percent, which indicated that 0.83 km2 land per 100 km2 land changed its way of use every year. The multidimensional transformation of land use types was direct manifestation that caused the temporal and spatial distribution changes of land use from 2000 to 2013. Throughout duration of 2000 to 2013, the NDVI was obviously improved, which indicated that the land use changes had certain rationality in the recent 13 years in Chuanjiang basin.
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