新开河流域土地利用格局变化及其生态学意义

On the land-use pattern shifting in Xinkai River Basin and its ecological significance

基于利用不同时期的地形图和TM遥感数据,运用ARC/INFO软件,以马尔柯夫空间概率模型为基础,对新开河流域的土地利用格局变化及驱动因素进行的分析,论证新开河流域土地利用结构日趋不合理:不仅林地占地最小,而且土地盐碱化、沙化严重,草地退化严重,生态环境质量整体向恶化方向发展,分析了生态环境恶化的原因,探讨了土地利用格局变化的生态学意义,提出了治理措施和方法。

This article is based on the analysis of the land-use pattern shifting in the Xinkai River basin and its driving factors, which has been made with the support of ARC/INFO software after the Markov model of space probability, in the light of the relief maps and the TM remote-sensing data for the various periods, shows that the land-use pattern in the basin has been unreasonable, as is proved by such facts as existence of few woods, serious land saline-desertification and progressive reduction of grassland - a general degradation of the eco-environment in the area. The reason for the degradation, the ecological significance of the pattern shifting and the appropriate measures to improve the eco-environment are dealt with in this article.