Abstract
The impact of forest management activities on the ability of forest ecosystems to sequester and store atmospheric carbon is of increasing scientific and social concern. This is because a quantitative understanding of how forest management enhances carbon storage is lacking in most forest management regimes. In this paper two forest regimes, government and community-managed, in Kayar Khola watershed, Chitwan, Nepal were evaluated based on field data, very high resolution (VHR) GeoEye-1 satellite image and airborne LiDAR data. Individual tree crowns were generated using multi-resolution segmentation, which was followed by two tree species classification (Shorea robusta and Other species). Species allometric equations were used in both forest regimes for above ground biomass (AGB) estimation, mapping and comparison. The image objects generated were classified per species and resulted in 70 and 82 % accuracy for community and government forests, respectively. Development of the relationship between crown projection area (CPA), height, and AGB resulted in accuracies of R2 range from 0.62 to 0.81, and RMSE range from 10 to 25 % for Shorea robusta and other species respectively. The average carbon stock was found to be 244 and 140 tC/ha for community and government forests respectively. The synergistic use of optical and LiDAR data has been successful in this study in understanding the forest management systems.
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Acknowledgments
This publication is reporting a joint work of ITC, University of Twente, Netherlands, and the International Centre for Integrated Mountain Development (ICIMOD) under the REDD+ project which is being carried out in three watersheds of Nepal. Special thanks to Mr. Basanta Shrestha, Dr. MSR Murthy, Dr. Bhaskar Karki, Ms. Seema Karki and Mr. Govinda Joshi from ICIMOD for their logistic support during the data collection period in Nepal. Finally, the immense support of Prof. Gilbert Nduru of KARATINA University is highly appreciated. The findings reported stand as scientific study and observations of the authors and do not necessarily reflect as the views of ITC and ICIMOD.
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Mbaabu, P.R., Hussin, Y.A., Weir, M. et al. Quantification of carbon stock to understand two different forest management regimes in Kayar Khola watershed, Chitwan, Nepal. J Indian Soc Remote Sens 42, 745–754 (2014). https://doi.org/10.1007/s12524-014-0379-3
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DOI: https://doi.org/10.1007/s12524-014-0379-3