【摘要】 基于1980年、1990年、2000年及2010年4期土地利用数据,定量化计算永定河上游流域土地利用动态度、土地利用类型间的转移矩阵、生态环境质量指数等指标,对永定河上游流域的土地利用变化和生态环境效应进行了系统分析。结果表明:(1)过去30年期间,研究区土地利用类型的面积所占比例由大到小排列为耕地>草地>林地>城乡、工矿、居民用地>水域>未利用土地;1980—1990年与1990—2000年,土地利用综合动态度分别为0.06%、0.19%,土地利用类型的转出率或转入率基本上均小于10%,土地利用变化较小;2000—2010年,土地利用综合动态度较大,达到了6%,土地利用类型的转出率或转入率均大于10%,土地利用变化较大。(2)2000—2010年间永定河上游流域生态环境质量指数从从0.4230上升到0.4290,生态环境质量略有好转;总体上维持着区域生态环境的动态稳定。该研究可为永定河上游流域土地利用格局优化及生态环境的改善提供技术支撑。更多还原

【Abstract】 Based on the four spatial data sets of land use and land cover change of 1980, 1990, 2000 and 2010 in the upstream of the Yongding River, we quantitatively calculated the land use dynamic degree, the transfer matrix between the land use types and ecological environmental quality index, and analyzed the land use change and its ecological environment effect in the upstream of the Yongding River. The result shows that(1) During the past 30 years, the proportion of land use/cover in the study area was ranked as: farm land> grassland> forest land> urban and built up land> water > unutilized land. The comprehensive dynamic degree of land use during 1980-1990 and 1990-2000 was 0.06% and 0.19% , respectively, and the land-use change rates and transfer rates were not more than 10% and the land use/cover change was small between the two period; while the comprehensive dynamic degree of land use was 6% and the land-use change rates and transfer rates were greater than 10% during the period from 2000 to 2010, and the land use/cover changed greatly.(2) During 2000-2010, the regional eco-environment quality index increased from 0.4230 to 0.4290, and the regional eco-environment quality improved slightly;while the overall quality of regional eco-environment remained relatively stable, and the soil and water loss control measures and the expansion of construction land of the area had a profound impact on the regional eco-environment. The study provided the technical support for the land use structure optimization and the improvement of the ecological environment in the upstream of the Yongding River.更多还原