JapanFlux2024 ID-PaB Palangkaraya Drained Burnt forest

The study was conducted in tropical peatlands in the upper catchment of the Sebangau River near Palangkaraya, the capital city of Central Kalimantan province, Indonesia. In Central Kalimantan, a large peatland area was deforested and drained during the late 1990s, mainly to develop farmlands according to a national project: the Mega Rice Project (MRP).
The site was a swamp forest; however, it was burnt in 1997 and 2002, El Nino years, and vegetation and surface peat soil were lost. A small tower of 4.0 m height was built at a distance of about 200 m from the canal in April 2004, when fern plants were sparsely re-growing and the ground was studded with small pools. Fern (Stenochlaena, Blechnum, and Lygodium spp.) and sedge (Cyperus, Scleria and Eleocharis spp.) plants had grown up to 0.5 m and covered most part of the ground in June 2005.There were no hummocks on the ground, because of destruction by fires. The peat depth was about 4 m. Fetches were about 250, 300, 1000, and 1000 m, respectively, for the west, south, north, and east directions.The turbulent fluxes of sensible heat, latent heat, CO2 were measured using the eddy covariance system.

本研究开展于印度尼西亚中加里曼丹省首府帕朗卡拉亚（Palangkaraya）附近塞邦巴河（Sebangau River）上游流域的热带泥炭地。20世纪90年代末，中加里曼丹地区大面积泥炭地遭砍伐并疏干，主要用于配合国家大型项目——巨型水稻工程（Mega Rice Project, MRP）以开垦农田。
该研究位点原为沼泽森林，但在1997年与2002年（均为厄尔尼诺年）遭遇火灾，植被与表层泥炭土壤均遭破坏。2004年4月，在距离灌溉渠约200米处搭建了一座高4.0米的小型观测塔，彼时蕨类植物正稀疏地重新生长，地表遍布小型积水池。
至2005年6月，蕨类（Stenochlaena、Blechnum及Lygodium属）与莎草（Cyperus、Scleria及Eleocharis属）植物已长至0.5米高，覆盖了绝大多数地表。受火灾破坏影响，地表未形成草丘。泥炭层厚度约为4米。西、南、北、东四个方向的风区长度（fetch）分别约为250米、300米、1000米与1000米。
本研究采用涡度协方差系统（eddy covariance system）测定了感热通量、潜热通量与二氧化碳（CO₂）的湍流通量。