【作者】 李瑶瑶；

【导师】 陈峰；

【作者基本信息】 北京交通大学 ， 土地资源管理， 2009， 硕士

【摘要】 本文以八十年代以来四期Landsat TM图象,通过运用大量GIS手段,对京津风沙源区土地利用变化进行分析,以探讨京津风沙源区土地沙化的LUCC过程以及风沙源工程实施以来对该地区土地利用/土地覆被变化的影响。首先分析了目前国内外LUCC的研究进展以及京津风沙源地区土地利用类型研究的现状,随着人类活动与环境变化之间的影响越来越剧烈,以及土地资源利用越来越受到重视,LUCC的研究已经成为热点研究领域,研究方法和模型也越来越丰富。本研究采用基于待征的土地利用变化时空数据模型,从时间发展和空间变化两个方面进行京津风沙源区LUCC的分析研究。京津风沙源区土地利用/覆被变化时间过程分析主要包括土地利用类型数量变化特征以及土地利用类型转换特征两个方面,得出主要土地利用类型数量变化集中在耕地和草地的变化,耕地数量持续保持增长,但增长幅度在下降;草地面积不断减少,减少的幅度同时也在下降的结论。风沙源区土地利用/覆被变化空间格局分析包括空间变化过程和空间分异格局两个部分,空间分异格局又主要探讨了土地利用数量变化的区域差异以及土地利用变化速度的区域差异两个方面。得出了风沙源区主要土地利用类型变化的分布地区,以及不同地区之间LUCC过程的差异,并进行了分析和比较。最后从京津风沙源工程实施情况入手,分析工程实施与该区LUCC过程变化的联系,得出工程实施对该区LUCC过程起着重要影响的结论。更多还原

【Abstract】 Based on the land-use dataset that interpreted from Landsat TM images in four periods,the dissertation focus on the change of land use of Beijing-Tianjin sand source district and analyse Land-use/cover change(LUCC) process in the distict and the influence of the control engineering.During last few decades,the land use change rate has been accelerated and the land use pattern has taken profound changes with the increase of population and the improvement of scientific technology.Land-use/cover change(LUCC) has become not only the focus of global environmental change studies,but also the important problems concerning the social economy sustainable development.Based on the multiple-scale land use spatial-temporal databases,the author analyzed the land use spatial-temporal change process and rules in Beijing-Tianjin sand source district.The LUCC process include two aspects-change of land use area and concersion between different land use. The general characters of land use quantity structure in 2000 were that grassland was dominant.Secondly were forest and farmland.The farmland_ area were keeping increasing but the increase amplitude decreased.The grassland area were keeping decreasing and the decrease amplitude decreased.Spatial pattern progress include two parts-the temporal change process and temporal differentiation pattern.Temporal differentiation pattern conclude the area difference and speed difference in different district.The conclusion shows different LUCC progress in different district.The conclusion shows that Beijing-Tianjin sand source control engineering has succeed change the degradation trend of land use in the district.更多还原