Oxidation and compaction of a collapsed peat dome in Central Kalimantan
Oxidation and compaction of a collapsed peat dome in Central Kalimantan
复制标题
加里曼丹中部塌陷泥炭穹顶的氧化和压实
DOI：
10.1016/j.geoderma.2006.08.021
复制
发表时间：
2006
期刊：
影响因子：
6.1
通讯作者：
D. Hoekman
中科院分区：
文献类型：
--
作者：
D. M. Kool;P. Buurman;D. Hoekman
据报道，加里曼丹（印度尼西亚）的泥炭圆顶由于伐木和人工排水等干扰而失去了圆顶形状。圆顶形状的损失可能是由两个主要过程（组合）引起的：压实和氧化。由于天然的、未受干扰的泥炭是大气CO2的主要汇，因此这两个过程之间的区别对于碳储存至关重要。在压实的情况下，不需要将CO2损失到大气中。在氧化的情况下，无论是由于改善排水或燃烧后增加分解，产生的所有CO2都进入大气。为了估计氧化和压实对泥炭丘形状损失的贡献，在加里曼丹中部的马瓦斯地区进行了研究。比较了一个完整的和倒塌的圆顶的物理和化学参数。在塌陷的泥炭穹丘中体积密度的增加表明发生了相当大的压实作用。根据初始体积密度，压实可能导致2.2至4.0 m的下沉。根据灰分含量测量，没有发生明显的氧化，但在坍塌的圆顶处发现的EC增加可能是由于至少2.3 cm至46.9 cm的泥炭氧化，这意味着坍塌后6年内分别排放了4.2至85.9 kg CO2m− 2。压实似乎是一个更重要的因素，在圆顶结构的损失比氧化的基础上，估计可能的泥炭损失范围。圆顶的倒塌对其化学参数只有很小的影响。重建似乎并没有受到坍塌及其后果的阻碍，但在最近遭受火灾的地点，这种情况较少。如果泥炭恢复生长，塌陷不一定对碳储存有害。
Peat domes in Kalimantan (Indonesia) are reported to loose their dome shape as a result of disturbance such as logging and artificial drainage. The loss of the dome shape can be caused by (a combination of) two major processes: compaction and oxidation. Because natural, undisturbed peat is a major sink for atmospheric CO2, the distinction between the two processes is of utmost importance with regard to carbon storage. In case of compaction, no CO2need to be lost to the atmosphere. In case of oxidation, either as a result of increased decomposition upon improved drainage or by burning, all CO2produced goes to the atmosphere. To estimate the contribution of oxidation and compaction to the loss of peat dome shape, research was conducted in the Mawas area in Central Kalimantan. Physical and chemical parameters of an intact and collapsed dome were compared. Increased bulk densities in the collapsed peat dome showed that considerable compaction has occurred. Depending on the initial bulk density, compaction has probably caused a subsidence from 2.2 to 4.0 m. According to ash content measurements, no significant oxidation has taken place, but increased EC found at the collapsed dome can be due to oxidation of at least 2.3 cm to 46.9 cm peat, which implies an emission of respectively 4.2 to 85.9 kg CO2m−2over the 6 years since collapse. Compaction appeared to be a more important factor in the loss of dome structure than oxidation based on the estimated possible ranges in peat loss. Collapse of the dome had only minor influence on its chemical parameters. Regrowth did not seem to be hindered by the collapse and its consequences, but it was less at sites that had suffered recent fires. If peat growth resumes, collapse need not be detrimental to carbon storage.