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All Journal Jurnal Natur Indonesia Teosofi: Jurnal Tasawuf dan Pemikiran Islam Journal of Degraded and Mining Lands Management Jurnal Riau Biologia JURNAL ENGGANO Prosiding Seminar Nasional Sains dan Teknologi Terapan Journal of Community Engagement Research for Sustainability JERNIH: Journal of Environmental Engineering and Hygiene Jurnal KALANDRA
Ahmad Muhammad
Universitas Islam Negeri Sunan Ampel Surabaya
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Nursing Public Health Social Sciences Other

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Hydrological modeling of small coastal peat island in degraded peatlands of Bengkalis Island, Riau Province Sutikno, Sigit; Yusa, Muhamad; Rinaldi, Rinaldi; Muhammad, Ahmad; Saputra, Hendra; Wardani, Khusnul Setia; Yamamoto, Koichi
Journal of Degraded and Mining Lands Management Vol. 13 No. 1 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.131.9163

Abstract

Small coastal peat islands such as Bengkalis (Riau, Indonesia) are hydrologically sensitive systems where groundwater level (GWL) controls ecosystem stability. Both extremes are hazardous: prolonged low GWL elevates peat-fire, subsidence, and carbon-loss risks, while excessively high GWL can trigger bog-burst. This study developed a simple empirical model to predict daily GWL in degraded peatlands on Bengkalis Island using in situ GWL data from three sites (drained, undrained inland, and undrained coastal) and GPM satellite rainfall (October 2023-April 2025). Calibrated over one year and validated over the next seven months, the model performed well at drained and coastal sites (R ~0.82, MAPE ~14%), capturing seasonal dynamics. In contrast, its performance at the inland site was lower (R ~0.5) due to minimal water table fluctuation. Coefficient values indicate the strongest rainfall response and fastest losses at the drained site, negligible daily loss at the inland site, and intermediate behavior at the coastal site. Scenario simulations highlight management-relevant risks: 15 rain-free days cause GWL to drop below the critical -0.40 m fire-risk threshold at the drained site and coastal site, whereas undrained inland remains just above it; conversely, 60 mm/day of rain for four days can raise GWL to the surface at coastal site (bog-burst risk). The model provides a practical tool for informing rewetting strategies to manage fire and collapse risks in degraded tropical peatlands.
Co-Authors Andy Hendri, MT, Andy Bagus Kurniawan, Bagus Bahdarsyah Bahdarsyah Dai, La David Michael Bin La Datau, Zainun Desita Salbiah Eki Susanto ELPE BIBAS, ELPE Hendra Saputra IRFAN NURARIFIN, IRFAN Juliana Juliana Koichi Yamamoto, Koichi Kusairi, Muhammad Mufidah, Arnys Primaveria Muhamad Yusa Nugroho, P Agung Nurul Qomar Pakarbudi, Adib Pranata, Syafroni Radith Mahatma Rinaldi Rinaldi Rohaini, Rahmi A Siti Fatonah Sri Catur Setyawatiningsih Sutikno, Sigit Wardani, Khusnul Setia YULMINARTI, YULMINARTI