A Model for Estimating Total Forest Coverage with Ground-Based Digital Photography

查看全文 作　　者：GU Zhu-[1,2,3]Jun;ZENG Zhi-[3]Yuan;SHI Xue-[1]Zheng;LI [4]Lin;D. C. [5]WEINDORF;ZHA [3]Yong;YU Dong-[1]Sheng;LIU [2]YongoMei

机构地区：[1]State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences,Nanjing 210008 (China);[2]School of Bio-Chemical and Environmental Engineering, Nanjing Xiaozhuang University, Nanjing 211171 (China);[3]College of Geography Science, Nanjing Normal University, Nanjing 210097 (China);[4]Department of Earth Sciences, Indiana University-Purdue University, Indianapolis, IN 46202 (USA);[5]LSU AgCenter, Baton Rouge, LA 70803 (USA)

出　　处：《Pedosphere》索引2010年第20卷第3期,共8页

基　　金：Supported by the National Basic Research Program (973 Program) of China (No.2007CB407206);the National Natural Science Foundation of China (No.40371053) 摘　　要：Vegetation fractional coverage (VFC) is one of the key indicators of vegetation distribution. In the work a measurement-based model was developed to derive total forest VFC (TG) as well as the VFC of trees (T) and shrub-grasses (G) separately in a subtropical forest area in Nanjing, China. Both upward and downward photographs were taken with a digital camera in 72 quadrats (10 m × 10 m each). Fifteen models were established and validated. Models jointly using both T and G performed better than those using the T and G separately. The best model, TG = T + G- 1.134 × T × G- 0.025 (R2 = 0.9115, P < 0.01, root mean squared error = 0.0789), is recommended for application. This model provides a good way to obtain total forest VFC values through taking tree and shrub-grass photos on ground below tree canopy rather than above tree canopy. 关键词：覆盖模型森林面积数字摄影地面估计甘油三酯植被覆盖度均方根误差

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A Model for Estimating Total Forest Coverage with Ground-Based Digital Photography

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