Effect of Vegetation Communities and Altitudes on the Soil Organic Carbon Stock in Kotli Bhel‐1A Catchment, India

Abstract

As per international policy agendas on mitigation of greenhouse gas emission, the impact change in land use on soil organic carbon (SOC) stocks is of major concern. There has been no systematic study carried out to estimate SOC pool in the catchment of hydroelectric reservoirs. An assessment of SOC stock along altitudinal gradient was carried out in the catchment of proposed Kotli Bhel 1A hydroelectric reservoir located in Uttarakhand, India. The SOC stocks were found to be decreasing with altitude, (i.e. soil under high altitude forests having more SOC and vice versa). The SOC map developed from the normalized difference vegetation index also verified the results and allowed for spatially explicit targeting of potential climate change mitigation efforts through soil carbon sequestration. The results also revealed that the alpine forest soil has a greater potential of C sequestration compared to devdar, oak, and chir species found in the catchment. This information will help policymakers or environmentalists to take preventive measures for afforestation of forest species that can sequester more C.Abbreviations: AGB, above ground biomass; BGB, below ground biomass; CO 2 e, CO 2 equivalent; GHG, greenhouse gas; GPS, global positioning system; LULC, land use and land cover; GW, global warming; MODIS, moderate resolution imaging spectroradiometer; NDVI, normalized difference vegetation index; OC, organic carbon; RMSE, root mean square error; SOC, soil organic carbon.(1 of 8) 1600650

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