| 基于NDVI的清水县植被变化分析 |
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| 引用本文： | 孙存举,吴晓青,李浩.基于NDVI的清水县植被变化分析[J].四川林勘设计,2011(4). |
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| 作者姓名： | 孙存举 吴晓青 李浩 |
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| 作者单位： | 四川省林业调查规划院; |
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| 摘 要： | 本研究以清水县为研究区域,以1979年和2008年该区的TM数据为遥感数据源,在遥感数字图像处理系统和GIS支持下,通过提取NDVI值以及NDVI与植被覆盖度之间的关系,对该县植被覆盖变化进行了研究。研究结果表明:1979～2008年清水县整体植被覆盖有所增加,植被指数在138以上的面积从1979年的52488.13hm2增加到2008年的117603.38hm2,净增65115.25hm2,占全县面积的33.80%;低盖度植被类型面积大大减少,其中,Ⅴ级植被面积减少了73780.25hm2,占全县总面积的34.22%,高盖度植被面积增加,其中,Ⅰ级植被增长了33798.07hm2,占全县总面积的17.54%,Ⅱ级、Ⅲ级植被面积均有不同程度的增加,植被盖度等级未变化的面积为62954.75hm2,占全县总面积的32.68%;植被退化面积为11768.25hm2,而植被好转面积多达117926.75hm2,是退化面积的10.02倍。通过综合治理,清水县生态环境得到大大改善。
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| 关 键 词： | NDVI 植被覆盖变化 清水县 |
Changing Analysis of Vegetation in Qingshui County Based on NDVI |
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| SUN Cun-ju,WU Xiao-qing,LI Hao.Changing Analysis of Vegetation in Qingshui County Based on NDVI[J].Sichuan Forestry Exploration and Design,2011(4). |
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| Authors: | SUN Cun-ju WU Xiao-qing LI Hao |
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| Institution: | SUN Cun-ju,WU Xiao-qing,LI Hao (Sichuan Forestry Inventory and Plan Institute,Chengdu 610500,China) |
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| Abstract: | Based on the TM data from 1979 and 2008,we studied the vegetation coverage change of Qingshui county which is located in loess hilly-gully region by extracting the NDVI values and analyzing the relationship between NDVI and vegetation cover under the help of the remote sensing digital image processing system and GIS.The results showed that during 1979-2008,the area of NDVI more than 138 was increased to 117603.38hm2 from 52488.13hm2,net increase 65115.25hm2,which accounted for 33.80% of the total area.The l... |
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| Keywords: | NDVI Vegetation cover change Qingshui County |
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