中文摘要：

本文以南水北调中线工程核心水源区淅川县为例,选取2004年TM、2014年GF1号影像等数据,解译获取了淅川县土地利用数据,对2004-2014年淅川县土地利用变化进行定量分析。通过选用区域生态环境质量模型,对研究期内淅川县土地利用变化的生态环境效应进行评估,并采用灰色关联法对导致淅川县生态环境质量变化的驱动因素进行分析。研究结果表明：（1）2004-2014年,林地、建设用地和水域面积增加,耕地面积减少。在林地资源演化趋势上,有林地、疏林地、灌木林地和苗圃地与林地资源的整体演化格局一致,而宜林地和无立木林地、未成林造林地呈减少的趋势;（2）在空间分布上,林地主要分布在海拔高、坡度较陡的北部山区,耕地和建设用地密集分布于海拔低、相对平缓的东南部地区;（3）2004年和2014年2期生态环境质量均在县域内表现出明显的空间差异,呈现出北高南低的分布趋势。研究期内淅川县区域生态环境质量指数从0.5443上升至0.6039,生态环境质量提高,其中宜林地和无立木林地转化为有林地、退耕还林对区域生态环境改善贡献最大;（4）局部地区生态环境呈负向发展,其中对森林资源采取掠夺式开采和粗放型管理、毁林开地对县域生态环境产生的负面影响最为深刻。（5）2004-2014年县域生态环境质量变化主要由政策和居民追求利益最大化的行为所驱动。

英文摘要：

Taking Xichuan in the core water source area of the middle route of south-to-north water diversion project as a case, this study obtained land use data of Xichuan by interpreting TM（2004） and GFl（2014） image data and quantitatively analyzed land use change of Xichuan from 2004 to 2014. The effects of land use change on ecological environment in Xichuan during the study period were evaluated by using the model of ecological environment quality at regional scale. Moreover, the driving factors of the change in ecological environment quality in Xichuan were analyzed using the gray correlation method. The results showed that： during 2004 to 2014, the area of forest land, construction land and water increased, and the area of farmland decreased. Also, the evolution trend of forest land, woodland, shrub land and nursery garden was consistent with the overall evolution pattern of forest resources. However, suitable land for forest, non timber forest land, unwoodland showed a decreasing trend. In the spatial distribution, forest land was mainly distributed in the northern mountainous area, with the high altitude, the steep slope. Farmland and construction land were mostly distributed in southeast area, with the low altitude, the relatively gentle slope. In the 2004 and 2014, the ecological environment quality of Xichuan both showed obvious spatial difference, and showed the distribution trend of north high and south low. During the study period, the regional ecological environment quality index of Xichuan increased from 0.5443 to 0.6039, and the quality of ecological environment was improved. Moreover, the contribution of suitable land for forest and non timber forest land being converted into forest land, and returning farmland to forests to the improvement of regional ecological environment was the most greatest. The ecological environment in some areas was the negative development. The negative impact of predatory exploitation, extensive management and deforestation on the ecological environment was the most