Impacts of rapid urbanization on the content of organic carbon in multimedia of Nanchang
Based on 6 phase Landsat remote sensing images from 1983 to 2014,the effects of rapid urbanization on the content and spatial distribution of organic carbon in multimedia (soil,dust and sediment) in Nanchang were analyzed by geostatistical methods.The results showed that the process of urbanization in Nanchang city experienced three stages during the past 30 years,a rapid development stage (2000-2005) and two slow-development stages (1983-2000,2005-2014).The average content of organic carbon in dust,soil,and sediment were 28.71,25.21 and 14.90 g· kg-1,respectively,which were greatly higher than the background value of soil organic carbon in Jiangxi province (2.44 g· kg-1).Organic carbon content in topsoil along the main road in the downtown was significantly higher than that in the suburban and its distribution showed a stepwise decreasing from the downtown to the suburb.The content of organic carbon in dust presented highly spatial heterogeneity and significantly decreased from the old city to the new zone,regardless of seasons.The content of organic carbon in the lake sediment generally showed a clear decreasing trend from the downtown to the suburbs.
NETL
NSTL
万方数据
维普
