摘要
基于多时点TM/ETM影像解译数据,运用遥感、GIS和景观生态学方法,分析洪泽湖地区近18a的土地利用变化和景观格局演变过程,揭示该地区内各种土地利用时空变化特征,并得出3个时期景观类型分布特征、景观格局变化的趋势及特征。结果表明:(1)区域内土地利用变化显著,整体处于不平衡的状态,主要表现为耕地持续减少、建设用地迅速增加、林地先增后减及草地和水域略有增加;(2)研究区景观结构和景观异质性发生了较大变化,斑块数目增加、平均斑块面积减少,景观多样性指数、景观均匀度指数总体上升,在区域景观破碎化程度加剧的同时,各景观类型间差异缩小,景观结构趋于多样化、均匀化和破碎化。最后,指出人类活动,尤其是经济建设是土地利用景观格局变化的主要因素,并对地区的生态可持续发展提出了相应建议。
Based on three sets of Landsat TM/ETM data（1990,2000 and 2008）, and by techniques of remote sensing, geographical information system （GIS） and landscape ecology, this paper studied changes of land use and landscape pattern from 1990 to 2008 in Hongze Lake Basin. It revealed the spatiotemporal changes of land use in this basin, and drew the landscape type distribution, trends and features of landscape pattern change in the three periods. Results show that. （1） In past 18 years, land use in this basin changed significantly, which mainly manifested by farmland continuous decreases and the built-up areas rapid increases, secondly, woodland decreases after increasing, grassland and water slight increase, which were in an unbalanced state overall. （2） The landscape structure and landscape heterogeneity in Hongze I.ake Basin changed greatly in this period. With increasing the degree of landscape fragmentation, diversity between landscape types is reduced and landscape structure tends to be uniform and reciprocal through increases of patch number, decreases of mean patch area, increases of Landscape diversity index and land- scape evenness index totally. At last, the paper indicated that main driving force of land use and landscape pattern changes was human activities, especially economic construction, and put forward some suggestions on the ecological sustainable development of the basin.
出处
《长江流域资源与环境》
CAS
CSSCI
CSCD
北大核心
2011年第10期1211-1216,共6页
Resources and Environment in the Yangtze Basin
基金
国家科技支撑计划项目"城乡一体化土地调查与监测技术研究"(2008BAJ11B07)
数字制图与国土信息应用工程国家测绘局重点实验室开放研究基金项目(GCWD200801)
江苏省测绘科研项目(JSCHKY200906)
