鄱阳湖区土地利用时空变化特征研究

A Study on Tempo-Spatial Change Characteristics in Land Use of Poyang Lake Region

以鄱阳湖区为研究对象,在遥感与地理信息系统、土地利用变化指数计算模型、相关分析法等技术与方法的支持下,通过土地利用变化指数分析鄱阳湖区土地利用变化特征。结果表明:草地与耕地的单一土地利用动态度最大,每年约有0.6%的草地景观发生了变化,约有0.3%的耕地景观发生了变化;水体与未利用地景观的稳定性最好,每年发生变化的仅有0.05%左右。就综合土地利用动态度而言,南昌县为最高,每年有近4.9%的土地利用景观类型发生了变化;进贤县为最小,每年只有约0.046%的土地利用景观类型发生了变化。土地综合动态与国内生产总值和财政总收入有较好的相关性,由于受到退耕还林、退田还湖等土地政策的影响,鄱阳湖区的土地利用程度综合指数2004年较1992年略有下降。

Taking Poyang Lake region as a case study area, this article analyzed the changes of tempo - spatial characteristics in land use based on Remote Sensing （ RS）, Geographical information system （ GIS）, correlation analysis method and land use change dynamic models. The result indicated that the simple land use change dynamic index of grassland and cultivated land are the largest. Approximately, 0.6% of grassland and 0.3 % of cultivated land changed every year. Water body and unused land are the most stable land uses. Only 0.05% of them changed every year. In terms of integrated land use dynamic index, Nanchang County is placed first where 4.9% of land use changed every year,and Jinxian County is placed the last where only 0. 046% of land use changed every year. The results of correlation analysis showed that GDP and total financial income are the most visible factors of land use change. Affected by land use policy such as that of returning cultivated land to lake or to forest, land use level of 2004 in Poyang Lake region decreased slightly compared to that of 1992.