摘要
利用Landsat7ETM+影像、土地利用现状图、地形图及多年平均的降水、气温、≥0℃积温、日照时数等气候指标的空间分布数据,借助RS/GIS软件,通过对各气候指标进行分级处理、空间叠加分析等过程,研究了局地气候条件下土地利用的空间分布特征。结果表明:①研究区林地覆盖率为54.7%,耕地占区域总面积的29.0%,其中水田和旱地的面积比为7.7∶1;其他土地利用类型占研究区总面积的比例分别为园地1.7%,城乡居民用地7.4%,工矿用地0.8%,水域4.3%,未利用地2.1%。②局地气候条件下土地利用的空间分布具有较明显的规律性,表现为随气温升高和积温增加,林地分布比例减少,水田、旱地、园地、城乡用地等均呈增加趋势;降水分布对土地利用格局的影响相反,即随降水增加,林地比例增加,水田、旱地、城乡居民用地、工矿用地等则减少;日照时数对区域土地利用格局的影响并不显著,但在流域尺度上对土地利用结构的差异有贡献。
It would help to predict the influence of globe change to maintain terrestrial ecosystem that research the feedback of land use/land cover （LULC） on climate. We had a study on the spatial pattern of LULC under the local climatic conditions using Landsat ETM＋ image,land use map,topographic map,and the spatial distribution data of temperature, precipitation, accumulated temperature by climatic zoning, o- verlay analysis. The results indicated that： （1） The area percentages of cultivated land,garden,forest land, settlement,industrial land,water bodies and unused land are 54.7%,29.0%,1.7%,7.7%,0.8%,4.3% and 2.1%, respectively. （2） Land use showed obviously spatial distribution laws under the local climatic conditions that the percentage of forest land increases but others decrease with the raising of temperature and accumulated temperature. However, the spatial distribution pattern of forest land is in a reverse manner as well as other land use types with the precipitation growth. （3） The land-use structure of different climate in Liling showed that the spatial of climatic factors formed a relatively suitable area for human beings, which has fertile soil, convenience traffic, high density population and tensely activity. This area is the major area for agricultural production; however,it suffered serious problems from enlarged city and industrial pollution. To obtain sustainable development on social, economy and environment, the local land-use planning must pay attention to the non-agricultural construction occupying arable land, farmland protection and environmental management.
出处
《水土保持研究》
CSCD
北大核心
2009年第2期82-86,共5页
Research of Soil and Water Conservation
基金
湖南农业大学人才引进项目"区域土地利用变化与生态环境响应机制"(690502)
关键词
土地利用
空间格局
局地气候
湖南醴陵市
land use/land cover
spatial patterns
local climate
Liling city of Hu＇nan province
