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中文摘要：
目的分析西安地区土地利用变化的空间特征以及由此引起的一系列环境效应。方法基于1990年与2000年两期TM影像，综合遥感与GIS技术以及马尔可夫模型，分析土地利用变化以及各类型转化。结果①建成地面积增加，而水体、耕地、未利用地与林地减少，建成地即居民地增加是以侵占大量的耕地为代价的，从而导致城市化问题突出；②研究区内土地利用变化以各类型转化为建成地的趋势最强，显示了研究区正处于城市化的快速阶段；③在今后一段时期内，水体、耕地、未利用地与林地将持续减少，建成地和耕地保护的矛盾将变得尤为突出。结论研究区内土地利用变化以各类型转化为城镇建设用地的趋势最强，在一定程度上显示了研究区正处于城市化的快速阶段。
英文摘要：
Aim To lucubrate the spatial characteristics of LUCC and a series of environment effects caused by LUCC in the Xi＇an Region. Methods Based on the TM images acquired in 1990 and 2000,integrated with RS and GIS means and markov model, the theoretical trend values of LUCC in the study area are analyzed. Results （ 1 ） The areas of urban building lands are enlarged, but the areas of waters, cultivated lands, uncultivated lands and forestland are reduced. The increase of the area of urban building lands was at the cost of encroaching a wealth of cultivated lands, thus, the pressure of urbanization becomes more serious ; （2） The trend that various land types are shifted into urban building lands is the most dominant, which reveals that the urbanization in the study area is rapid- ly developed; （3） The areas of waters, cultivated lands, uncultivated lands and forestland will be continuously re- duced in the future, and the contradiction between the urban building lands and the conservation of cultivated lands will become more serious. Conclusion The trend that all the other land types translated into construction land appears much more dominant than any others in the study region. Xi＇an City is in a fast developing stage of urbanization to a certain extent.
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