Efforts to restore degraded peatlands that have declining groundwater levels are carried out to prevent disasters such as forest fires and carbon emissions into the atmosphere. At present, peatland restoration is an essential topic for researchers, especially regarding hydrological restoration (the re-wetting). Water balance calculation is needed in providing hydrological information and supporting re-wetting of degraded peatlands. In this paper, a study of water balance was conducted for peatland re-wetting in Sinarwajo Village, the Province of Jambi. The result showed that the evapotranspiration budget is 56% from the rainfall. Besides, run-off and groundwater storage is about 32% and 12% respectively. This information can be a primary goal of re-wetting, so the efforts of re-wetting should increase more groundwater storage and limit the water discharge from peatland.
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