Estimating montane forest above-ground biomass in the upper reaches of the Heihe River Basin using Landsat-TM data (SCI)
文献类型：期刊论文
| 作者 | Tian X.; Li Z. Y.; Su Z. B.; Chen E.; van der Tol C.; Li X.; Guo Y.; Li L. H.; Ling F. L. |
| 刊名 | International Journal of Remote Sensing
 |
| 出版日期 | 2014 |
| 卷号 | 35期号:21页码:7339-7362 |
| 英文摘要 | In this work, the results of above-ground biomass (AGB) estimates from Landsat Thematic Mapper 5 (TM) images and field data from the fragmented landscape of the upper reaches of the Heihe River Basin (HRB), located in the Qilian Mountains of Gansu province in northwest China, are presented. Estimates of AGB are relevant for sustainable forest management, monitoring global change, and carbon accounting. This is particularly true for the Qilian Mountains, which are a water resource protection zone. We combined forest inventory data from 133 plots with TM images and Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) global digital elevation model (GDEM) V2 products (GDEM) in order to analyse the influence of the sun-canopy-sensor plus C (SCS+C) topographic correction on estimations of forest AGB using the stepwise multiple linear regression (SMLR) and k-nearest neighbour (k-NN) methods. For both methods, our results indicated that the SCS+C correction was necessary for getting more reliable forest AGB estimates within this complex terrain. Remotely sensed AGB estimates were validated against forest inventory data using the leave-one-out (LOO) method. An optimized k-NN method was designed by varying both mathematical formulation of the algorithm and remote-sensing data input, which resulted in 3000 different model configurations. Following topographic correction, performance of the optimized k-NN method was compared to that of the regression method. The optimized k-NN method (R-2 = 0.59, root mean square error (RMSE) = 24.92 tonnes ha(-1)) was found to perform much better than the regression method (R-2 = 0.42, RMSE = 29.74 tonnes ha-1) for forest AGB retrieval over this montane area. Our results indicated that the optimized k-NN method is capable of operational application to forest AGB estimates in regions where few inventory data are available. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 源URL | [http://ir.casnw.net/handle/362004/27641]  |
| 专题 | 寒区旱区环境与工程研究所_中科院寒区旱区环境与工程研究所（未分类）_期刊论文 |
| 推荐引用方式 GB/T 7714 | Tian X.,Li Z. Y.,Su Z. B.,et al. Estimating montane forest above-ground biomass in the upper reaches of the Heihe River Basin using Landsat-TM data (SCI)[J]. International Journal of Remote Sensing,2014,35(21):7339-7362. |
| APA | Tian X..,Li Z. Y..,Su Z. B..,Chen E..,van der Tol C..,...&Ling F. L..(2014).Estimating montane forest above-ground biomass in the upper reaches of the Heihe River Basin using Landsat-TM data (SCI).International Journal of Remote Sensing,35(21),7339-7362. |
| MLA | Tian X.,et al."Estimating montane forest above-ground biomass in the upper reaches of the Heihe River Basin using Landsat-TM data (SCI)".International Journal of Remote Sensing 35.21(2014):7339-7362. |
入库方式： OAI收割
来源：寒区旱区环境与工程研究所
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