Estimation of vegetation coverage based on topography-adjusted vegetation index (TAVI) in Changting County, Fujian Province
LIU Yadi1,2, WANG Xiaoqin1,2, JIANG Hong1,2
1. Key Laboratory of Spatial Data Mining & Information Sharing of Ministry of Education, Fuzhou University, Fuzhou 350002, China; 2. Spatial Information Research Center of Fujian Province, Fuzhou 350002, China
Abstract：Vegetation indexes, such as Normalized Difference Vegetation Index (NDVI), are used widely in estimating vegetation coverage using remote sensing imagery. However, most of them do not take topographic effects into account, particular in rugged areas. In this research, a study area was selected in Changting County, Fujian Province. The authors adopted Topography-Adjusted Vegetation Index (TAVI) to eliminate the topographic effects, and utilized dimidiate pixel model to estimate the vegetation coverage of this area. To investigate the effectiveness of TAVI for the elimination of topographic effects, the authors compared vegetation coverages estimated on the basis of TAVI with those using NDVI. A comparative analysis of visual effect and statistical indicators showed that the accuracy of vegetation coverage estimated by TAVI outperformed NDVI-dependent estimation. In sunny areas, the results from TAVI and NDVI were similar, while in shade areas, the results from TAVI were much better than those from NDVI. TAVI can effectively alleviate the estimation difference between shade and sunny areas and improve the estimation accuracy in shade areas.
刘亚迪, 汪小钦, 江洪. 基于地形调节植被指数估算长汀县植被覆盖度[J]. 国土资源遥感, 2015, 27(1): 164-171.
LIU Yadi, WANG Xiaoqin, JIANG Hong. Estimation of vegetation coverage based on topography-adjusted vegetation index (TAVI) in Changting County, Fujian Province. REMOTE SENSING FOR LAND & RESOURCES, 2015, 27(1): 164-171.
[1] Bannari A,Morin D,Bonn F,et al.A review of vegetation indices[J].Remote Sensing Reviews,1995,13(1/2):95-120. [2] Gitelson A A,Kaufman Y J,Stark R,et al.Novel algorithms for remote estimation of vegetation fraction[J].Remote Sensing of Environment,2002,80(1):76-78. [3] 程红芳,章文波,陈锋.植被覆盖度遥感估算方法研究进展[J].国土资源遥感,2008,20(1):13-18. Cheng H F,Zhang W B,Chen F.Advances in researches on application of remote sensing method to estimating vegetation coverage[J].Remote Sensing for Land and Resources,2008,20(1):13-18. [4] Godínez-Alvarez H,Herrick J E,Mattocks M,et al.Comparison of three vegetation monitoring methods:Their relative utility for ecological assessment and monitoring[J].Ecological Indicators,2009,9(5):1001-1008. [5] 郭玉川,何英,李霞.基于MODIS的干旱区植被覆盖度反演及植被指数优选[J].国土资源遥感,2011,23(2):115-118. Guo Y C,He Y,Li X.Remote sensing inversion of vegetation coverage and optimization of vegetation index based on MODIS data in arid area[J].Remote Sensing for Land and Resources,2011,23(2):115-118. [6] Barati S,Rayegani B,Saati M,et al.Comparison the accuracies of different spectral indices for estimation of vegetation cover fraction in sparse vegetated areas[J].The Egyptian Journal of Remote Sensing and Space Science,2011,14(1):49-56. [7] 游浩妍,骆成凤,刘正军,等.基于MODIS植被指数估算青海湖流域植被覆盖度研究 .遥感信息,2012,27(5):55-60,66. You H Y,Luo C F,Liu Z J,et al.Estimation vegetation coverage based on vegetation index of MODIS data in Qinghai Lake watershed .Remote Sensing Information,2012,27(5):55-60,66. [8] Boyd D S,Foody G M,Ripple W J.Evaluation of approaches for forest cover estimation in the Pacific Northwest,USA,using remote sensing[J].Applied Geography,2002,22(4):375-392. [9] 徐爽,沈润平,杨晓月.利用不同植被指数估算植被覆盖度的比较研究[J].国土资源遥感,2012,24(4):95-100. Xu S,Shen R P,Yang X Y.A comparative study of different vegetation indices for estimating vegetation coverage based on the dimidiate pixel model[J].Remote Sensing for Land and Resources,2012,24(4):95-100. [10] Chen W,Sakai T,Moriya K,et al.Estimation of vegetation coverage in semi-arid sandy land based on multivariate statistical modeling using remote sensing data[J].Environmental Modeling and Assessment,2013,18(5):547-558. [11] Neigh C S R,Tucker C J,Townshend J R G.North American vegetation dynamics observed with multi-resolution satellite data[J].Remote Sensing of Environment,2008,112(4):1749-1772. [12] Wittich K-P,Hansing O.Area-averaged vegetative cover fraction estimated from satellite data[J].International Journal of Biometeorology,1995,38(4):209-215. [13] Small C.Estimation of urban vegetation abundance by spectral mixture analysis[J].International Journal of Remote Sensing,2001,22(7):1305-1334. [14] 廖春华,张显峰,孙权,等.基于HJ-1高光谱数据的植被覆盖度估测方法研究[J].遥感信息,2011(5):65-70. Liao C H,Zhang X F,Sun Q,et al.Fractional vegetation cover estimation using HJ-1 spaceborne hyperspectral data[J].Remote Sensing Information,2011(5):65-70. [15] Höpfner C,Scherer D.Analysis of vegetation and land cover dynamics in north-western Morocco during the last decade using MODIS NDVI time series data[J].Biogeosciences,2011,8:3359-3373. [16] 刁兆岩,徐立荣,冯朝阳,等.呼伦贝尔沙化草原植被覆盖度估算光谱模型[J].干旱区资源与环境,2012,26(2):139-144. Diao Z Y,Xu L R,Feng C Y,et al.The Ground Spectral Model for estimating vegetation coverage on desertified grassland,Hulunbeier,Inner Mongolia,China[J].Journal of Arid Land Resources and Environment,2012,26(2):139-144 . [17] Jiang Z Y,Huete A R,Chen J,et al.Analysis of NDVI and scaled difference vegetation index retrievals of vegetation fraction[J].Remote Sensing of Environment,2006,101(3):366-378. [18] 江洪,王钦敏,汪小钦.福建省长汀县植被覆盖度遥感动态监测研究[J].自然资源学报,2006,21(1):126-132,166. Jiang H,Wang Q M,Wang X Q.Dynamic monitoring of vegetation fraction by remote sensing in Changting County of Fujian Province[J].Journal of Natural Resources,2006,21(1):126-132,166. [19] 江洪,毛政元,汪小钦.地形调节植被指数及其在森林动态监测中的应用[J].北京林业大学学报,2011,33(5):8-12. Jiang H,Mao Z Y,Wang X Q.A topography-adjusted vegetation index(TAVI) and its application in dynamic forest monitoring[J].Journal of Beijing Forestry University,2011,33(5):8-12. [20] 江洪,汪小钦,吴波,等.地形调节植被指数构建及在植被覆盖度遥感监测中的应用[J].福州大学学报:自然科学版,2010,38(4):527-532. Jiang H,Wang X Q,Wu B,et al.A topography-adjusted vegetation index(TAVI) and its application in vegetation fraction monitoring[J].Journal of Fuzhou University:Natural Science,2010,38(4):527-532. [21] 肖能文,江洪,汪小钦,等.地形调节植被指数的抗地形效果验证[J].遥感信息,2013,28(4):75-80. Xiao N W,Jiang H,Wang X Q,et al.Verification of topographic elimination performance for topography-adjusted vegetation index[J].Remote Sensing Information,2013,28(4):75-80. [22] 吕长春,王忠武,钱少猛.混合像元分解模型综述[J].遥感信息,2003(3):55-58,60. Lü C C,Wang Z W,Qian S M.A review of pixel unmixing models[J].Remote Sensing Information,2003(3):55-58,60. [23] Ichoku C,Karnieli A.A review of mixture modeling techniques for sub-pixel land cover estimation[J].Remote Sensing Reviews,1996,13(3/4):161-186.
2015, Vol. 27 
