Abstract
Climate change coupled with deforestation has brought about an increase in greenhouse gas emissions in the atmosphere. One way to control climate change is to reduce greenhouse gas emissions by maintaining the integrity of natural forests and increasing the density of tree populations. This research aimed to (a) identifies the density of stand trees in the upland forests of the Wanggu Watershed; (b) analyze the potential carbon stocks contained in the upstream forests of the Wanggu Watershed; (c) develop a model to estimate potential carbon stocks in the upland forests of the Wanggu Watershed. The land cover classification in this study used the guided classification with the Object-Based Image algorithm. Normalized Difference Vegetation Index (NDVI) was employed as an indicator of vegetation cover density. Field measurements were carried out by calculating the diameter of the stand trees in 30 observation plots. Field biomass values were obtained through allometric equations. Regression analysis was conducted to determine the correlation between NDVI densities and field biomass. The results showed that the best equation for estimating potential carbon stocks in the Wanggu Watershed forest area was y = 3.48 (Exp. 7,435x), with an R2 of 50.2%. Potential above ground biomass carbon in the Wanggu Watershed based on NDVI values was 414,043.26 tons in 2019, consist of protected forest areas of 279,070.15 tons and production forests of 134,973.11 tons. While total above biomass carbon based on field measurement reached 529,541.01 tons, consist of protected forests of 419,197.82 tons and production forests of 110,343.20 tons.
Highlights
Global climate change is a real problem and has had a wide impact on the life of organisms in general
The results of the Normalized Difference Vegetation Index (NDVI) analysis are digital numbers ranging from -1 to 1 (Suyadi et al, 2013), which the higher the NDVI value, the higher the density of vegetation
The results of the NDVI analysis in the upland forests of the Wanggu Watershed show that the NDVI values range from 0.08 to 0.57, the value is divided into 3 density classes using the natural breaks method which is low, medium, and high
Summary
Global climate change is a real problem and has had a wide impact on the life of organisms in general. The high concentration of Greenhouse Gases (GHGs) in the atmosphere has exceeded the ability of natural systems to absorb it. Some of these GHGs are Carbon Dioxide (CO2), Methane (CH4), Nitrogen Oxide (N2O), Hydrofluorocarbons (HFCs), Perfluorocarbons (PFCs) and Sulfur Hexafluoride (SF6) (Efendi et al, 2012). Forest resources have multi-functional potential that can provide economic, environmental, and social benefits for the welfare of humanity. In the long term, the management of forest resources must be prepared to cover all of its multi-functional potentials, so that be able in transforming economic, environmental, and social potentials into tangible benefits for the community
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