Carbon sequestration and storage value of coffee forest in Southwestern Ethiopia

摘要

The purpose of this research is to determine the amount and value of carbon stock in Southwestern Ethiopia's coffee forest from 1978 to 2050, as well as carbon sequestration from 1988 to 2050. Different time-series satellite data were acquired and classified into land-use categories using ArcGIS and ENVI 5:0, followed by IDRISI forecasts up to 2050, and finally modeling with INVEST. Data were collected within the plot constructed in a systematic random sampling manner using quadrates 20 m X 20 m. The social cost of carbon (US$12/tCO(2)e) used to estimate the monetary worth of the services. Forest conversion anticipated to reduce the carbon stock by 1.86 Mt by the end of 2050, from 65.8 Mt in 1978 to 7.01 Mt in 2018. The rate of Carbon sequestration was 2.1Mt/year at the end of 1998, and it will be reduced to 1.49Mt/year by the end of 2050. Overall, 121.1Mt of CO2 is sequestered over 63 years, but there was also emission from deforestation and service loss (84.4Mt), resulting a net sequestered CO2 of 36.6Mt by the end of 2050. The total elemental carbon stock value in 1978 was $2. 896 billion, this will be reached $2.5billion ($9.175 billion CO(2)e) at the end of 2050. The value of sequestration will be estimated at $1.715 billion, but with a value loss of $1.153 billion, the net sink value from 1988 to 2050 will be $0.6 billion. In general, these findings show that the forest region will have a total storage and sequestration value (CO(2)e) of $9.775 billion by the end of 2050. The carbon worth in this forest area is thus a good indicator of the importance, and thus the value estimate here may well persuade policymakers to revise their forest-related policy and provide site-specific information to preserve this remnant forest.