论文部分内容阅读
以长江三角洲核心区为例,利用1990、2000、2010年3期遥感影像解译获取土地利用变化数据,按照“生产-生态-生活”土地利用主导功能分类,通过土地利用转移矩阵、生态环境质量指数、土地利用转型的生态贡献率等方法,定量分析长江三角洲地区土地利用转型、时空格局特征与生态环境效应。结果表明:(1)1990~2010年,长三角地区基于“三生用地”的土地利用转型表现为生产用地减少,生态用地稳定,及生活用地快速增加。(2)长三角地区生态环境质量指数从1990年的0.470持续降至2010年的0.444,整体质量有所恶化,较高质量区和高质量区面积与比重保持稳定。(3)1990~2010年,长三角地区同时存在生态改善和恶化的两种趋势,生态环境改善小于环境恶化的趋势。城镇和农村生活用地、工矿生产用地对农业生产用地的挤占则是导致生态环境质量恶化的重要原因。
Taking the core area of the Yangtze River Delta as an example, the data of land use change were acquired by interpreting three remote sensing images of 1990, 2000 and 2010. According to the classification of dominant functions of land use in production-ecology-life, the land use change matrix, ecological environment quality Index and the ecological contribution rate of land use transformation, and other methods to quantitatively analyze the land use transition, spatial and temporal characteristics and eco-environmental effects in the Yangtze River Delta. The results show that: (1) From 1990 to 2010, the transformation of land use based on the “Sansei land” in the Yangtze River Delta shows that the production land is reduced, the ecological land is stable, and the land for living is rapidly increasing. (2) The eco-environmental quality index in the Yangtze River Delta region dropped from 0.470 in 1990 to 0.444 in 2010, and the overall quality deteriorated. The area and proportion of higher quality areas and high quality areas remained stable. (3) From 1990 to 2010, there are two trends of ecological improvement and deterioration in the Yangtze River Delta. The ecological environment improvement is less than the trend of environmental deterioration. Urban and rural living land and the occupation of agricultural production land by industrial and mining production areas are the important reasons leading to the deterioration of ecological environment quality.