The effectiveness of canal blocking for hydrological restoration in tropical peatland
The effectiveness of canal blocking for hydrological restoration in tropical peatland
复制标题
热带泥炭地渠道堵塞对水文恢复的有效性
DOI：
10.1051/matecconf/201927606003
复制
发表时间：
2019
影响因子：
--
通讯作者：
Yamamoto Koichi
中科院分区：
文献类型：
--
作者：
Sutikno Sigit;Nasrul Besri;Gunawan Haris;Jayadi Rachmad;Rinaldi;Saputra Eka;Yamamoto Koichi
印度尼西亚共和国泥炭地恢复局(BRG-RI)是一个受命在2020年前恢复200万公顷退化泥炭地的机构，该机构基于印尼泥炭地恢复的重新湿地、重新植被和重振生计的计划，制定了解决这一问题的3-R方法。旨在从水文上将泥炭地恢复到接近自然状态的重新湿润计划是通过堵塞运河、回填运河和建造深井来实施的。为了了解BRG修复活动的进展情况，了解运河堵塞对热带泥炭地复湿的效果是非常重要的。通过对渠道周边地下水位波动的监测，研究渠道堵塞的效果。这项研究是在辽宁省Kepulauan Meranti Regency的Sungai Tohor村泥炭地的一个运河区块进行的。为了监测渠道堵塞对GWL的影响，在垂直于渠道的泥炭地上设置了5口潜井，分别距离20m、70m、120m、170m和220m。研究结果表明，河道堵塞对距运河约170m半径范围内的泥炭地地下水位有一定的抬升作用。再湿对半径的影响可能较大，也可能较小，这在很大程度上取决于该地区的水文地貌情况。
The Peatland Restoration Agency of the Republic of Indonesia (BRG-RI), an agency that is mandated to restore 2 million hectares of degraded peatland by 2020, has developed a 3-R approach towards tackling the problem based on the program of rewetting, revegetation, and revitalization of livelihood for the peatlands restoration in Indonesia. The Rewetting program that aims to rehabilitate hydrologically a peatland to a near natural state is carried out by canal blocking, canal backfilling, and construction of deep wells. To know the progress of the restoration activities by BRG, it is very important to understand the effectiveness of canal blocking on rewetting of the tropical peatland. The effectiveness of canal blocking was investigated through the monitoring of groundwater level (GWL) fluctuation around the canal block. This study was carried out at a canal block that is located at the peatland of Sungai Tohor Village, Kepulauan Meranti Regency, Riau Province. For monitoring of GWL fluctuation as the impact of canal blocking, five dipwells were set at the peatland that are perpendicular to the canal with the distance of 20 m, 70 m, 120 m, 170 m, and 220 m respectively. The results of this study show that the impact of canal blocking could raise the water table in the peatland at the radius of about 170 m from the canal. The radius impact of the re-wetting might be bigger or smaller, that strongly depends on the hydrotopography situation of the area.