摘要
基于长乐市2006年、2009年两景Landsat TM影像,采用像元二分模型法获取二者的植被覆盖度,并结合该地区的土地覆盖结果,对长乐市2006年～2009年间植被覆盖度的变化及其原因开展分析研究.研究结果表明,长乐市植被覆盖总体良好,2006年该地区中高度、高度植被覆盖区占总面积的61.36％,2009年占总面积的58.81％.但2006年～2009年期间长乐市植被覆盖度整体呈现下降趋势,其中高植被覆盖区由2006年的31.46％降到2009年的28.49％.人口激增和经济的快速发展侵占和破坏了大量的耕地和林地,这是造成长乐市植被覆盖度变化的根本原因.
Based on the Landsat TM images of Changle city in 2006and 2009,the model of dimidiate pixel was applied in ex- tracting the information of vegetation coverage.In conjunction with the result of regional land cover,the further change detection reveals the spatial and temporal variations of vegetation coverage and their causes in the study area from 2006 to 2009.The re- sults show that the vegetation coverage of Changle is good in general,the areas of medium-high and high vegetation coverage have accounted for 61.36%and 58.81% respectively.However,the vegetation coverage in the study area presented a general downward trend from 2006to 2009.The high vegetation coverage accounted for 31.46%of the study area in 2006but decreased to 28.49%in 2009.The result indicates that the encroachment and destruction of a large amount of farmland and woodland were the major cause of vegetation coverage changes of Changle city.
出处
《遥感信息》
CSCD
2013年第6期56-61,共6页
Remote Sensing Information
基金
福建省教育厅重点项目(JK2009004)
