| 基于遥感技术的广州市城市森林叶面积指数推算 |
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| 引用本文： | 吴文友,吴泽民,胡鸿瑞,贾保全.基于遥感技术的广州市城市森林叶面积指数推算[J].东北林业大学学报,2010,38(3). |
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| 作者姓名： | 吴文友 吴泽民 胡鸿瑞 贾保全 |
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| 作者单位： | 安徽农业大学,合肥,230036;中国林业科学院林业研究所 |
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| 基金项目： | 国家“十一五”科技支撑项目(2006BAD03A06) |
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| 摘 要： | 应用叶面积指数(LA,I)及叶面积总量表达城市森林的绿量,并采用2004年遥感影像数据推算广州市不同类型森林的LA,I,建立了不同森林类型叶面积指数(LA,I)与归一化植被指数(ND,V,I)的回归模型,结果表明:不同类型森林的LA,I与ND,V,I的关系均可用逻辑斯蒂方程表达;不同森林类型的LA,I因树种、林龄及空间结构的不同而各异,按平均LA,I排序:有林地0.99灌木林地0.78≈疏林地0.78其它林地0.69(3月份数据);广州市森林叶面积总量29.47×108m2,森林的平均LA,I为0.95,市域范围的平均LA,I仅为0.40;不同森林类型对叶面积总量的贡献率与其占有的土地面积比例不相符,应通过采用不同的管理措施来增加其绿量的贡献度。
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| 关 键 词： | 叶面积指数(L_(A I)) 植被指数(N_(D V 城市森林绿量推算 城市森林类型 广州 |
Estimation on Leaf Area Index of Urban Forests in Guangzhou by Remote Sensing Technique |
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| Wu Wenyou,Wu Zemin,Hu Hongrui,Jia Baoquan.Estimation on Leaf Area Index of Urban Forests in Guangzhou by Remote Sensing Technique[J].Journal of Northeast Forestry University,2010,38(3). |
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| Authors: | Wu Wenyou Wu Zemin Hu Hongrui Jia Baoquan |
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| Institution: | School of Forestry and Landscape Architecture;Anhui Agricultural University;Hefei 230036;P. R. China;the Research Institute of Forestry;Chinese Academy of Forestry |
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| Abstract: | Green biomass of urban forest is described as Leaf area index (LAI) in this study. The remote sensing images of Guangzhou in 2004 were employed to compute LAI of forest,and a regressive model of LAI and Normalized difference vegetation index (NDVI) for different forest categories was built as well. Results show that the Logistic model could be used to describe the relationship between LAI and NDVI. LAI values for different forest types are various due to different species compositions and stand structures. ... |
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| Keywords: | Leaf area index Normalized difference vegetation index Gegulation green biomass estimation Urban forest types Guangzhou |
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