黄山市土地利用变化的生态效应研究

利用黄山市1987年、1995年、2000年三期TM遥感影像数据,对研究区内近十年来土地利用变化及其对生态环境的影响进行了深入分析.研究表明:近10年来黄山市生态环境有退化的趋势,其间1987～1995年退化相对较严重.同时,在不同区域间存在分异,祁门县的生态环境质量最好,屯溪区的生态环境质量最差.在研究时段内,除休宁县的生态环境有所改善,其他地区都存在不同程度的退化,其中黄山区的生态环境退化相对最为严重.生态环境质量和土地利用类型之间,存在很大的相关性,尤其是土地利用类型中的林地面积和生态环境质量息息相关:森林覆盖率高,生态环境好;而森林覆盖率下降,生态环境质量也相应下降.

Land use change and its ecological effect in Huangshan City

By using three periods(1987,1995,2000) Landsat TM datas of Huangshan City,this paper making a close analysis to the change of land use in research area and effect of eco-environment produced by this change in late ten years.The research revealed eco-environment has degradation tendency,that became relative deteriorated violently especially between 1987 and 1995 year.Meanwhile the heterogeneity existed in different districts:the best eco-environment quality was in Qimen and the eco-environment in Tunxi was the worst of all.In the research period except Xiuning's eco-environment has been improved,other districts has degradated all to different extent,and further,the most violent degradation lying in Huangshan.There is a close correlation between eco-environment and mode of land use,especially the area of forest in land use mode has more direct relation with eco-environment quality.The higher rate of forest coverage,thus the better of eco-environment.To the contrary,the rate of forest coverage reduced,the eco-environment quality correspondingly deteriorated.