中文摘要：

本文利用1989年、1999年和2006年三期遥感影像解译数据，借助GIS的空间分析功能，从土地利用变化的幅度及速度、土地利用程度和土地类型转化模式等角度对鄱阳湖区近17年的土地利用动态变化情况进行了定量分析。结果表明：在人类活动和自然因素的影响下，湖区土地利用结构发生明显改变，耕地面积正在逐渐减少，但其减少速度相对较慢；而建设用地、滩地都有不同程度的增加，其中以建设用地增加速度为最快；水体和未利用地受湖区水土资源开发的影响，面积出现大幅减少；林地是近17年湖区最为稳定的土地类型，面积基本保持不变。从土地利用类型的转移变化来看，湖区各土地类型存在着不同程度的相互转换，水体主要转出方向为草地和滩地，转入部分则主要来自于耕地；而受生态退耕和垦殖活动的影响，耕地、林地和草地三者之间转换较为频繁；研究期间，建设用地的增加主要是通过大量侵占耕地来实现的；而滩地面积的增减主要受水位和人类耕作活动的制约。

英文摘要：

Land use change is one of hot topics of global environmental change. Its research is of significance for reasonable use of land resources and effective protection of the environment. Based on GIS and Landsat TM images, the authors analyzed structural features and spatial patterns of land use changes in the Poyang Lake region over the recent 17 years. Results showed that the composition characteristics of the land system changed slightly, but the internal structure of the land system changed obviously due to the combined influence of human activities and natural factors. During the period 1989-2006, the cropland, woodland, and water bodies were prevalent, with the total area of the three land use types over 75% of the total area of the region. The area proportion of construction land and unused land were essentially small, with their total area smaller than 8% of the total area. Cropland, water bodies, and unused land were reducing significantly during the study period based on change detection performed, whereas the relative change of cropland was slower than others in terms of the value of the land use dynamic degree because of its large proportion. The area of construction land and bottomland increased to a certain extent, and the relative change of construction land was the fastest in all land use types. Areas of woodland remained the least changes. Each land use type transferred within each other during different study periods were analyzed based on the transfer matrix of land use types. Water bodies were converted principally into grassland and bottomland. On the other hand, water bodies were mainly converted from cropland as a result of the influence of policy about Poyang Lake protection. Woodland, grassland, and cropland were transferred frequently within each other. This indicates that human activities which might be detrimental to the ecosystems and the environment may have taken place when the policy of environment protection was being implemented. Increases in construction land areas were primarily ca