| 基于MODIS数据的新宁县植被覆盖变化研究 |
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| 引用本文： | 刘继煊,陈贻科.基于MODIS数据的新宁县植被覆盖变化研究[J].林业资源管理,2010(4). |
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| 作者姓名： | 刘继煊 陈贻科 |
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| 作者单位： | 湖南省新宁县林业局,湖南,新宁,422700 |
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| 摘 要： | 利用NASA提供的逐月合成的新宁县2000—2009年MODIS-NDVI数据,配合气象台站资料,分析了县域NDVI季节时空变化特征及10年间新宁县植被覆盖的年际变化。研究表明:新宁县NDVI季节变化与植被的生物学特性、物候变化相一致,具有明显的季节性规律;在空间上具有明显的分异性,表现为东南、西南地区植被指数常年处于较高状态,季节变化不明显;中部地区植被覆盖中等偏低,年内变化居中;西北部山丘遍布,还有耕地和其他农业用地,人为因素较大,植被的季节变化最为明显。近10年新宁县植被总体呈稳定和改善状态,舜皇山自然保护区和万峰山自然保护区植被恢复明显,同时,由于县域境内不合理的开发利用,分散的植被退化现象依然存在。
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| 关 键 词： | MODIS-NDVI 植被覆盖 新宁县 |
Study on the Changes of Vegetation Cover in Xinning County Based on MODIS Data |
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| LIU Jixuan,CHEN Yike.Study on the Changes of Vegetation Cover in Xinning County Based on MODIS Data[J].Forest Resources Management,2010(4). |
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| Authors: | LIU Jixuan CHEN Yike |
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| Abstract: | Using the information of the meteorological observatory and the MODIS-NDVI data from 2000 to 2009 provided by NASA,this paper analyses the characteristics of NDVI's seasonal and annual changes in time and space in the last 10 years in this county.The results showed that the NDVI seasonal changes of Xinning County was in line with the biological characteristics of vegetation and the changes in phenology,which shows obviously seasonal pattern.There are also obvious differences in space.there were no obvious seasonal changes in the southeast and southwest areas with VI at a high state permanently.there were obvious seasonal variation in the central area with VI at a middle level.There were distinct seasonal changes in the northwest area with VI influenced by human factors.The vegetation cover in Xinning County is generally stable and improving.Shunhuang Mountain Nature Reserve and Wanfengshan Mountain Nature Reserve's vegetation cover has resumed in the last 10 years,but scattered vegetation degradation still exists because of the unreasonable exploitation in this county. |
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| Keywords: | MODIS-NDVI |
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