塔里木河下游尉犁县景观格局变化分析

【目的】分析塔里木河中下游尉犁县1990~2005年的生态格局变化。【方法】以景观生态学的理论和方法为指导,借助现代3S技术和数理统计软件、图形处理软件,以多时相的遥感影像矢量化图为基础,利用GIS的数据输入、输出、管理和空间叠加分析等功能。【结果】可以看出自1990年以来,尉犁县以荒漠为基质,以农田和草地为主要嵌块体的景观分布格局基本未发生改变。【结论】景观多样性指数、均匀度指数减少,景观的异质性程度下降,优势度指数增加,景观愈来愈由少数景观斑块类型所控制。

Analysis of Landscape Pattern Change in Yuli Countyof the Lower Reaches of Tarim River

Objective and Method]Through the use of modern 3S Technology , mathematical software and graphics software, based on vector map of multi-temporal remote sensing images, this paper tries to use GIS data input, output, management and spatial overlay analysis function to systematically analyze the changes in ecological pattern of Yuli County in middle and lower reaches of the Tarim River in 1990-2005.Result]Since 1990, the basic distribution pattern of the landscape in Yuli County has not changed the desertification into a substrate, farmland and grassland into the main embedded block. Conclusion]Landscape diversity index and evenness index were reduced, the degree of landscape heterogeneity was decreased , the dominance index was increased, the landscape is under the control of a few types of landscapes.