Airborne Riegl LiDAR (LMS-Q560) technology was used to map the vertical structure of different Peat Swamp Forest (PSF) transects in August 2007 and 2011. As a study area we selected the Block C of the Ex-Mega Rice Project (EMRP) located in Central Kalimantan (Indonesia). During the period of June to September, 2009 there were a large incidence of fires events. The monthly average precipitation in this period was 13mm, whereas 121mm and 232mm for the same period in 2008 and 2010, respectively. As a result there were significant subsidence events. The peat surface roughness for the drained and burned peat swamp forest (DF) was 114±27cm. We observed near the Taruna drainage channel (extension of 12km) over the four years period an accumulated subsidence of 27±17cm. The accumulated subsidence in drained peat swamp areas (DB) affected by fire was in average 48±31cm. In the other hand, the PSF accounted for an accumulated regrowth of 2.8±5.1m. The regrowth was stronger in areas that were not affected by fire. The estimate of Above Ground Biomass (AGB) for the DF based on allometric equations applied on canopy height models (CHM) was 250±66 Mg·ha-1. Along the Kalampangan drainage channel (11km) we found for the four years period a subsidence of 43±25cm. The main reasons for the peat subsidence may be related to both peat consumption by fire followed afterwards by compaction and oxidation processes including to the constant drainage.