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All Journal Journal of Degraded and Mining Lands Management
Qalbi, Andria Harfani
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Short-term natural restoration effects on groundwater table in several peatland conditions of Acacia plantation forests Qalbi, Andria Harfani; Tarigan, Suria Darma; Barus, Baba; Sudadi , Untung
Journal of Degraded and Mining Lands Management Vol. 12 No. 4 (2025)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2025.124.8191

Abstract

One significant approach to restore the ecosystem function of degraded peatlands is natural restoration. This study evaluated the effect of short-term natural restoration on groundwater table in several peatland conditions in the Acacia plantation retired since 2016. Four types of land: burned land, Acacia post-harvest land, retired Acacia plantation forest, and the natural forest were considered as our study area. This study analyzed soil properties and remote sensing using the NDVI index to evaluate vegetation density in 2016, 2019, and 2022. This study found that natural restoration in the period of 2016-2022 increased vegetation density, almost similar to natural forest vegetation. Both soil properties and groundwater table on Acacia plantation forest and natural forest were not significantly different. High saturated hydraulic conductivity and low bulk density on both areas supported the stability of peat hydrology. In addition, variations in rainfall affected the pattern of changes in groundwater table, with a decrease during the dry season and an increase during the rainy season. The findings of this study confirm that short-term natural restoration can restore hydrological and vegetation functions in degraded peatlands, especially in Acacia plantation areas. These findings can be scientific recommendations for sustainable peatland management.
Long-term effects of fire and logging on groundwater table and soil moisture in Acacia plantation peatlands Qalbi, Andria Harfani; Tarigan, Suria Darma; Barus, Baba; Sudadi, Untung
Journal of Degraded and Mining Lands Management Vol. 13 No. 3 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.133.10359

Abstract

Soil moisture and the groundwater tables are important for the sustainable management and maintenance of tropical peatland ecosystems. This study examined the long-term impacts of fires and logging on groundwater tables and soil moisture in peatlands used for Acacia plantations. Four land conditions were compared: natural forest (FRS), unharvested Acacia plantations (UHV), post-harvest areas in 2016 (HV), and post-fire areas in 2015 (BAR). Observations were made during the rainy and dry seasons to determine how peat responded to rainfall. The soil conditions observed included groundwater levels measured by the gravimetric method and dipwells, and other soil properties such as bulk density, soil porosity, and water-filled pore space. The results showed that natural forest and unharvested Acacia sites experienced increased soil moisture content during the wet season and a shallower groundwater table than the burned area, which consistently recorded the lowest values. All sites experienced a dramatic decline in both groundwater table and soil moisture during the dry season. This decline was most severe in post-fire peatlands, where the groundwater table fell by more than 80 cm and soil moisture declined from 389% to 230% in some locations. Statistical tests confirmed that both burning and logging had a significant effect on the physical characteristics of peat and groundwater table (? = 0.05). This study shows that, after many years, burned and harvested peatlands continue to experience hydrological degradation and are unable to maintain stable groundwater tables and soil moisture.
Co-Authors Baba Barus Suria Darma Tarigan Untung Sudadi