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| 基于遥感的黄土高原典型区植被退化分析——以泾河流域为例 | |
| 引用本文： | 索安宁,王兮之,林勇,葛剑平,秦向华.基于遥感的黄土高原典型区植被退化分析——以泾河流域为例[J].遥感学报,2009,13(2):291-299. |
| 作者姓名： | 索安宁 王兮之 林勇 葛剑平 秦向华 |
| 作者单位： | 1. 北京师范大学,景观生态与可持续性科学研究中心,北京,100875;国家海洋环境监测中心,辽宁,大连,116023 2. 佛山科技学院资源环境学院,广东,佛山,528000 3. 国家海洋环境监测中心,辽宁,大连,116023 4. 北京师范大学,景观生态与可持续性科学研究中心,北京,100875 5. 北京林业大学林学院,北京,100091 |
| 基金项目： | 国家科技支撑项目，国家自然科学基金重点项目 |
| 摘 要： | 以黄上高原泾河流域为例,首先利用遥感植被指数和气候干燥度指数之间的回归模型,模拟出了潜在植被指数,在此基础上通过遥感监督分类方法得出泾河流域现生植被分布格局和潜在植被的分布格局,并利用转换矩阵方法得出了植被退化的空间态势.结果表明:泾河流域最主要的潜在植被类型是针阔叶疏林(32.44%)、阔叶落叶林(31.28%)和中牛灌丛(23.71%).与现生植被相比较,有25.08%的阔叶落叶林潜在分布区被开垦为农作物,13.32%退化为针阔叶疏林,13.04%退化为中生灌丛,14.22%变化为旱生灌丛,仅有25.90%的面积保持了阔叶落叶林植被;针阔叶疏林分布区主要退化为农作物(26.01%)、旱生灌丛(20.99%)、草甸(17.12%);中生灌丛主要退化为草甸(30.29%)和温带草原(43.21%).植被的退化以流域中部、南部的黄土残塬沟壑区退化最为严重,其次为流域北部的黄土丘陵区,而流域东部的子午岭山区和流域西部的六盘山区植被退化相对较轻. |
| 关 键 词： | 潜在植被 现牛植被 植被退化 泾河流域 遥感 |
Vegetation degradation analysis in typical region of the loess plateau based on remote sensing: a case in Jinghe River Basin |
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| SUO An-ning,WANG Xi-zhi,LIN Yong,GE Jian-ping and QIN Xiang-hua.Vegetation degradation analysis in typical region of the loess plateau based on remote sensing: a case in Jinghe River Basin[J].Journal of Remote Sensing,2009,13(2):291-299. | |
| Authors: | SUO An-ning WANG Xi-zhi LIN Yong GE Jian-ping and QIN Xiang-hua |
| Abstract: | JingheRiverBasin is chosen as a case to study vegetation degradation in Loess Plateau in this paper. Firstly, remote sensing based vegetation index (VI) and climatic aridity index are used to estimate potential vegetation index by regressionmodel approach. The spatialdistributions ofcurrentvegetation and potentialvegetation in JingheRiverBasin are then obtained according to supervised classification ofNDVI remote images and potential vegetation index. The status or severity of vegetation degradation is analyzed bymeans of the transferpossibility between vegetation types. The result shows that themain potential vegetation types of the JingheRiverBasin are broadleaved and coniferousmixed sparse forest(32.44% ), broadleaved deciduous forest(31.28% ) and shrub(23.71% ). It is found that25.08% and13.32% of the broad leaves forestpotential regionwere converted to cultivated land and broadleaved and coniferous mixed sparse fores,t while13.04% and14.22% changed to shrub and aridity shrub with only 25.09% potential region remained broad leaves fores.t Potentialregion of the broadleaved and coniferousmixed spare forestchanged to cropland(26.01% ), aridity shrub(20.99% ) and meadow (17.12% ) whereas potential region for shrub was dominant by meadow (30.29% ) and grassland (43.21% ). Vegetation degradation ismost serious in loess gully region, followed by loess hilly region in northern basinwhereas vegetation degradation inmountain region ofZiwuling in eastern basin and Liupanshan inwestern basin are relative sligh.t |
| Keywords: | potential vegetation current vegetation vegetation degradation the Jinghe River Basin remote sensing |
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