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http://dx.doi.org/10.11626/KJEB.2018.36.1.033

Rewetting Strategies for the Drained Tropical Peatlands in Indonesia  

Roh, Yujin (Department of Environmental Science and Ecological Engineering, Graduate School, Korea University)
Kim, Seongjun (Department of Environmental Science and Ecological Engineering, Graduate School, Korea University)
Han, Seung Hyun (Department of Environmental Science and Ecological Engineering, Graduate School, Korea University)
Lee, Jongyeol (Department of Environmental Science and Ecological Engineering, Graduate School, Korea University)
Son, Yowhan (Department of Environmental Science and Ecological Engineering, Graduate School, Korea University)
Publication Information
Korean Journal of Environmental Biology / v.36, no.1, 2018 , pp. 33-42 More about this Journal
Abstract
The tropical peatlands have been deforested and converted to agricultural and plantation areas in Indonesia. To manage water levels and increase the overall productivity of crops, canals have been constructed in tropical peatlands. The canals destructed the structure of the tropical peatlands, and increased the subsidence and fire hazard risks in the region. The Indonesian government enacted regulations and a moratorium on tropical peatlands, in order to reduce degradation. A practical method under the regulations of rewetting tropical peatlands was to permit a canal blocking. In this study, four canal blocking projects were investigated regarding their planning, construction priority, design, building material, construction, monitoring, time and costs associated with the canal blockings. In the protected areas, regulations restricted the development of the tropical peatlands areas that were noted as deeper than 3 m, and the administration stopped issuing new concessions for future work projects for this noted criteria of land use. A noted purpose of canal blockings in these areas was to effectuate the restoration of the lands in the region. The main considerations of the restoration efforts were to maintain a durability of the blockings, and to encourage the participation of the area stakeholders. In the case of a concession area, regulations were set into place to restrict clear-cutting and shifting cultivation, and to maintain groundwater level in the tropical peatland. The most significant priorities identified in the canal blocking project were the efficiency and cost-effectiveness of the project. Nevertheless, the drainage of tropical peatlands has been continued. On the basis of a literature review on regulations and rewetting methods in tropical peatlands of Indonesia, we discussed the improvements of the regulations, and adequate canal blockings to serve the function to rewet the tropical peatlands in Indonesia. Our results would help establishing an adequate direction and recommended guideline on viable rewetting methods for the restoration of drained tropical peatlands in Southeast Asia.
Keywords
canal blocking; drained tropical peatlands; Indonesia; rewetting;
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