JapanFlux2024 ID-PaD Palangkaraya drained 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 forest had also been selectively logged until the end of the 1990s. Dominant tree species and the microtopography of the forest floor resembled those at the ID-Puf site. A large canal (25 m wide x 3.5 - 4.5 m deep) that was excavated in 1996 and 1997 has functioned effectively to facilitate drainage of the forest. A 50 m high tower was built for flux measurement in 2001. The tower is located about 400 m from the canal. Fetches were about 400, 500, 1500 m, and longer than 5000 m, respectively, for the north, east, west, and south directions.The turbulent fluxes of sensible heat, latent heat, CO2 were measured using the eddy covariance system.

本研究在印度尼西亚中加里曼丹省首府帕朗卡拉亚附近的塞邦巴河上游集水区的热带泥炭地开展。20世纪90年代末，中加里曼丹大面积泥炭地因国家项目“巨型水稻工程（Mega Rice Project, MRP）”而被砍伐并排水，主要用于开垦农田。直至20世纪90年代末，该区域森林还曾遭受选择性采伐。优势树种与林地表层微地形与ID-Puf站点相似。1996至1997年开挖的一条宽25米、深3.5至4.5米的大型运河，有效发挥了森林排水功能。2001年搭建了一座高50米的通量观测塔，该塔距离运河约400米。北、东、西、南四个方向的通量足迹分别约为400米、500米、1500米，南部足迹则超过5000米。研究采用涡动协方差系统（eddy covariance system）对感热、潜热与二氧化碳的湍流通量进行了测定。