Impact of Land Use/Cover Change on Regional Net Primary Productivity in Wanjiang City Belt During the Period from 2000 to 2010
Based on three periods of Landsat TM/ETM remote sensing image interpretation data in 2000,2005 and 2010,the temporal and spatial variation of land use of Wanjiang City belt in recent 11 years were quantitatively analyzed.In addition,using the MODIS/NDVI data and meteorological data,the NPP of the study area were estimated by using the improved CASA model,then the effect of the land class conversion on NPP were analyzed and evaluated in the research area.The results show that the land use pattern of the study area changed significantly from 2000 to 2010,it shows that the areas of farmland,grassland and unused land reduced,construction land and water area increased,forestland area increased after reduction;the main characteristic of land use type conversion was significantly reduce of the farmland and rapidly increase of construction land;in the past 11 years,the NPP of the study area showed an increasing trend,the spatial distribution pattern of high level in north and low level in south;the mean NPP of each land use type was increased,and forestland increased most rapidly;the vegetation NPP in the north of the Yangtze River region showed a trend of gradual increase,while along and south of the Yangtze River regions share the different changing trend;NPP loss resulting from the conversion of farmland to construction land was the largest.
land use/cover changenet primary productivityCASA modelWanjiang City belt
国家科技期刊平台
NSTL
万方数据
维普
