Emisi Gas Metana Dari Waduk Saguling, Cirata Dan Jatiluhur

Global warming is one of the environmental issues that give interest both nationally and internationally. Global warming which is happened on this planet is mainly caused by increasing levels of greenhouse gases, such as methane gas. Source of methane gas that comes from reservoirs in Indonesia has not been studied yet. That is why in 2012, the study on methane emissions from Saguling, Cirata and Jatiluhur reservoirs was conducted. Method of research was done by direct measurements in the field using a floating chamber connected to the infrared spectrometer. The Measurement was carried out two times, respectively each in March and April which were done at 12-19 locations in each reservoir (inlet, middle, outlet reservoirs, and the sources of pollution). The results showed that the average value of methane gas emissions in Saguling, Cirata and Jatiluhur reservoirs respectively are 1,183 g/m2/day; 0.620 g/m2/day and 0.410 g/m2/day g/m2/hari. These values were higher than the average value in the reservoirs in the tropical countries (Panama, Brazil, and Guyana) which has the average of 0.300 g/m2/day. However, because of reservoir surface area in Indonesia is less than the peatland and agricultural areas, it can be estimated that the total emissions of methane gas from the reservoir is less than the total emissions from peatland and agricultural areas.