Main Article Content
Abstract
Tropical peatland degradation remains a critical environmental challenge in Southeast Asia, yet operational monitoring frameworks that align with governance boundaries remain limited. This study aimed to develop an open-data remote sensing framework for assessing peatland condition at the Peat Hydrological Unit (Kesatuan Hidrologis Gambut, KHG) scale in South Sumatra, Indonesia. Using Google Earth Engine, four satellite-derived indicators were extracted annually for 12 KHGs over seven years from 2018 to 2024: Normalized Difference Water Index from MODIS MOD09A1, Enhanced Vegetation Index from MODIS MOD13Q1, fire frequency from NASA FIRMS, and surface water extent from the JRC Global Surface Water dataset. The indicators were normalized and integrated into a weighted composite score using weights of 30% for NDWI, 25% for EVI, 30% for inverse fire frequency, and 15% for surface water extent. In 2024, seven KHGs were classified as At Risk and five as Intact/Recovering, with scores ranging from 46.5 to 76.9. Six KHGs declined between 2018 and 2024, while five improved. El Nino years reduced health scores by an average of 11.3 points, and cropland conversion was the strongest land-cover predictor of lower scores (r=−0.52). Weight sensitivity analysis showed that seven of twelve KHG classifications remained stable across five weighting scenarios. The framework was reproducible, governance-aligned, and suitable as a screening tool for peatland restoration prioritization.
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Copyright (c) 2026 Muaffan Wisaksono, Abdhullah Syawalbhi Leo

This work is licensed under a Creative Commons Attribution 4.0 International License.
References
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- Mitchell, A. L., Rosenqvist, A., & Mora, B. (2017). Current remote sensing approaches to monitoring forest degradation in support of countries measurement, reporting and verification systems for REDD+. Carbon Balance and Management, 12, 9. https://doi.org/10.1186/s13021-017-0078-9
- Nurhayati, A. D., Saharjo, B. H., Sundawati, L., Syartinilia, & Cochrane, M. A. (2021). Forest and peatland fire dynamics in South Sumatra Province. Forest and Society, 5(2), 591–603. https://doi.org/10.24259/fs.v5i2.14435
- Omar, M. S., Ifandi, E., Sukri, R. S., Kalaitzidis, S., Christanis, K., Lai, D. T. C., & Tsikouras, B. (2022). Peatlands in Southeast Asia: A comprehensive geological review. Earth-Science Reviews, 232, 104–149. https://doi.org/10.1016/j.earscirev.2022.104149
- Pekel, J.-F., Cottam, A., Gorelick, N., & Belward, A. S. (2016). High-resolution mapping of global surface water and its long-term changes. Nature, 540, 418–422. https://doi.org/10.1038/nature20584
- Putra, R., Lestari, D. O., Sutriyono, E., Sabaruddin, & Iskandar, I. (2019). Dynamical link of peat fires in South Sumatra and the climate modes in the Indo-Pacific region. Indonesian Journal of Geography, 51 (1), 18–22. https://doi.org/10.22146/ijg.35667
- Rossita, A., Nurrochmat, D. R., Boer, R., Hein, L., & Riqqi, A. (2021). Assessing the monetary value of ecosystem services provided by Gaung-Batang Tuaka Peat Hydrological Unit (KHG), Riau Province. Heliyon, 7 (10), e08208. https://doi.org/10.1016/j.heliyon.2021.e08208
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- Vermote, E. (2021). MOD09A1 MODIS/Terra surface reflectance 8-day L3 global 500m SIN grid V061 [Data set]. NASA EOSDIS Land Processes DAAC. https://doi.org/10.5067/MODIS/MOD09A1.061
- Vetrita, Y., & Cochrane, M. A. (2020). Fire frequency and related land-use and land-cover changes in Indonesia’s peatlands. Remote Sensing, 12 (1), 5. https://doi.org/10.3390/rs12010005
- Yuwati, T. W., Rachmanadi, D., Pratiwi, Turjaman, M., Indrajaya, Y., Nugroho, H. Y. S. H., Qirom, M. A., Narendra, B. H., Winarno, B., Lestari, S., Santosa, P. B., Adi, R. N., Savitri, E., Putra, P. B., Saputra, D. D., Wahyuningtyas, R. S., Prayudyaningsih, R., Halwany, W., & Murniati. (2021). Restoration of degraded tropical peatland in Indonesia: A review. Land, 10 (11), 1170. https://doi.org/10.3390/land10111170
- Zanaga, D., Van De Kerchove, R., Daems, D., De Keersmaecker, W., Brockmann, C., Kirches, G., Wevers, J., Cartus, O., Santoro, M., Fritz, S., Lesiv, M., Herold, M., Tsendbazar, N. E., Xu, P., Ramoino, F., & Arino, O. (2022). ESA WorldCover 10 m 2021 v200 [Data set]. Zenodo. https://doi.org/10.5281/zenodo.7254221
References
Anshari, G. Z., Gusmayanti, E., & Novita, N. (2021). The use of subsidence to estimate carbon loss from deforested and drained tropical peatlands in Indonesia. Forests, 12 (6), 732. https://doi.org/10.3390/f12060732
Burdun, I., Bechtold, M., Aurela, M., De Lannoy, G. J. M., Desai, A. R., Humphreys, E., Kareksela, S., Komisarenko, V., Liimatainen, M., Marttila, H., Minkkinen, K., Nilsson, M. B., Ojanen, P., Salko, S.-S., Tuittila, E.-S., Uuemaa, E., & Rautiainen, M. (2023). Hidden becomes clear: Optical remote sensing of vegetation reveals water table dynamics in northern peatlands. Remote Sensing of Environment, 296, 113736. https://doi.org/10.1016/j.rse.2023.113736
BRGM (Peatland and Mangrove Restoration Agency) [Badan Restorasi Gambut dan Mangrove]. (2021). Strategic plan of the Peatland and Mangrove Restoration Agency 2021–2024 [Rencana strategis Badan Restorasi Gambut dan Mangrove 2021–2024]. Peatland and Mangrove Restoration Agency.
Cahyono, B. K., Aditya, T., & Istarno. (2022). The determination of priority areas for the restoration of degraded tropical peatland using hydrological, topographical, and remote sensing approaches. Land, 11 (7), 1094. https://doi.org/10.3390/land11071094
Crippa, P., Castruccio, S., Archer-Nicholls, S., Lebron, G. B., Kuwata, M., Thota, A., Sumin, S., Butt, E., Wiedinmyer, C., & Spracklen, D. V. (2016). Population exposure to hazardous air quality due to the 2015 fires in Equatorial Asia. Scientific Reports. 6, 37074. https://doi.org/10.1038/srep37074
Dadap, N. C., Cobb, A. R., Hoyt, A. M., Harvey, C. F., & Konings, A. G. (2019). Satellite soil moisture observations predict burned area in Southeast Asian peatlands. Environmental Research Letters, 14 (9), 094014. https://doi.org/10.1088/1748-9326/ab3891
Dadap, N. C., Hoyt, A. M., Cobb, A. R., Oner, D., Kozinski, M., Fua, P. V., Rao, K., Harvey, C. F., & Konings, A. G. (2021). Drainage canals in Southeast Asian peatlands increase carbon emissions. AGU Advances, 2 (1), e2020AV000321. https://doi.org/10.1029/2020AV000321
Didan, K. (2021). MOD13Q1 MODIS/Terra vegetation indices 16-day L3 global 250m SIN grid V061 [Data set]. NASA EOSDIS Land Processes DAAC. https://doi.org/10.5067/MODIS/MOD13Q1.061
Ghazaryan, G., Krupp, L., Seyfried, S., Landgraf, N., & Nendel, C. (2024). Enhancing peatland monitoring through multisource remote sensing: Optical and radar data applications. International Journal of Remote Sensing, 45 (18), 6372–6394. https://doi.org/10.1080/01431161.2024.2387133
Giglio, L., Schroeder, W., & Justice, C. O. (2016). The Collection 6 MODIS active fire detection algorithm and fire products. Remote Sensing of Environment, 178, 31–41. https://doi.org/10.1016/j.rse.2016.02.054
Gorelick, N., Hancher, M., Dixon, M., Ilyushchenko, S., Thau, D., & Moore, R. (2017). Google Earth Engine: Planetary-scale geospatial analysis for everyone. Remote Sensing of Environment, 202, 18–27. https://doi.org/10.1016/j.rse.2017.06.031
Greco, S., Ishizaka, A., Tasiou, M., & Torrisi, G. (2019). On the methodological framework of composite indices: A review of the issues of weighting, aggregation, and robustness. Social Indicators Research, 141, 61–94. https://doi.org/10.1007/s11205-017-1832-9
Irfan, M., Koriyanti, E., Saleh, K., Hadi, Safrina, S., Awaludin, Sulaiman, A., Akhsan, H., Suhadi, Suwignyo, R. A., Choi, E., & Iskandar, I. (2024). Dynamics of peatland fires in South Sumatra in 2019: Role of groundwater levels, Land, 13 (3), 373. https://doi.org/10.3390/land13030373
Koupaei-Abyazani, N., Burdun, I., Desai, A. R., Hergoualc’h, K., Hirano, T., Melling, L., Swails, E., Tang, A. C. I., & Wong, G. X. (2024). Tropical peatland water table estimations from space. Journal of Geophysical Research: Biogeosciences, 129 (6), e2024JG008116. https://doi.org/10.1029/2024JG008116
KLHK (Ministry of Environment and Forestry of the Republic of Indonesia). (2017). Decree of the Minister of Environment and Forestry of the Republic of Indonesia No. SK.129/MENLHK/SETJEN/PKL.0/2/2017 concerning the establishment of the national peat hydrological unit map Ministry of Environment and Forestry of the Republic of Indonesia.
Lees, K. J., Quaife, T., Artz, R. R. E., Khomik, M., & Clark, J. M. (2018). Potential for using remote sensing to estimate carbon fluxes across northern peatlands: A review. Science of the Total Environment, 615, 857–874. https://doi.org/10.1016/j.scitotenv.2017.09.103
Lestari, N. S., Rochmayanto, Y., Salminah, M., Novita, N., Asyhari, A., Gangga, A., Ritonga, R., Yeo, S., & Albar, I. (2024). Opportunities and risk management of peat restoration in Indonesia: Lessons learned from peat restoration actors. Restoration Ecology, 32 (1), e14054. https://doi.org/10.1111/rec.14054
Miettinen, J., Shi, C., & Liew, S. C. (2016). Land cover distribution in the peatlands of Peninsular Malaysia, Sumatra and Borneo in 2015 with changes since 1990. Global Ecology and Conservation, 6, 67–78. https://doi.org/10.1016/j.gecco.2016.02.004
Minasny, B., Berglund, Ö., Connolly, J., Hedley, C., de Vries, F., Gimona, A., Kempen, B., Kidd, D., Lilja, H., Malone, B., McBratney, A., Roudier, P., Rudiyanto, Padarian, J., Poggio, L., ten Caten, A., Thompson, D., Tuve, C., & Widyatmanti, W. (2019). Digital mapping of peatlands: A critical review. Earth-Science Reviews, 196, 102870. https://doi.org/10.1016/j.earscirev.2019.05.014
Mitchell, A. L., Rosenqvist, A., & Mora, B. (2017). Current remote sensing approaches to monitoring forest degradation in support of countries measurement, reporting and verification systems for REDD+. Carbon Balance and Management, 12, 9. https://doi.org/10.1186/s13021-017-0078-9
Nurhayati, A. D., Saharjo, B. H., Sundawati, L., Syartinilia, & Cochrane, M. A. (2021). Forest and peatland fire dynamics in South Sumatra Province. Forest and Society, 5(2), 591–603. https://doi.org/10.24259/fs.v5i2.14435
Omar, M. S., Ifandi, E., Sukri, R. S., Kalaitzidis, S., Christanis, K., Lai, D. T. C., & Tsikouras, B. (2022). Peatlands in Southeast Asia: A comprehensive geological review. Earth-Science Reviews, 232, 104–149. https://doi.org/10.1016/j.earscirev.2022.104149
Pekel, J.-F., Cottam, A., Gorelick, N., & Belward, A. S. (2016). High-resolution mapping of global surface water and its long-term changes. Nature, 540, 418–422. https://doi.org/10.1038/nature20584
Putra, R., Lestari, D. O., Sutriyono, E., Sabaruddin, & Iskandar, I. (2019). Dynamical link of peat fires in South Sumatra and the climate modes in the Indo-Pacific region. Indonesian Journal of Geography, 51 (1), 18–22. https://doi.org/10.22146/ijg.35667
Rossita, A., Nurrochmat, D. R., Boer, R., Hein, L., & Riqqi, A. (2021). Assessing the monetary value of ecosystem services provided by Gaung-Batang Tuaka Peat Hydrological Unit (KHG), Riau Province. Heliyon, 7 (10), e08208. https://doi.org/10.1016/j.heliyon.2021.e08208
Tacconi, L. (2016). Preventing fires and haze in Southeast Asia. Nature Climate Change, 6, 640–643. https://doi.org/10.1038/nclimate3008
United Nations Environment Programme. (2022). Global peatlands assessment: The state of the world’s peatlands: Evidence for action toward the conservation, restoration, and sustainable management of peatlands. United Nations Environment Programme. https://doi.org/10.59117/20.500.11822/41222
United Nations Office for Disaster Risk Reduction. (2024). Indonesia wildfires, 2023: Forensic analysis. United Nations Office for Disaster Risk Reduction.
Vermote, E. (2021). MOD09A1 MODIS/Terra surface reflectance 8-day L3 global 500m SIN grid V061 [Data set]. NASA EOSDIS Land Processes DAAC. https://doi.org/10.5067/MODIS/MOD09A1.061
Vetrita, Y., & Cochrane, M. A. (2020). Fire frequency and related land-use and land-cover changes in Indonesia’s peatlands. Remote Sensing, 12 (1), 5. https://doi.org/10.3390/rs12010005
Yuwati, T. W., Rachmanadi, D., Pratiwi, Turjaman, M., Indrajaya, Y., Nugroho, H. Y. S. H., Qirom, M. A., Narendra, B. H., Winarno, B., Lestari, S., Santosa, P. B., Adi, R. N., Savitri, E., Putra, P. B., Saputra, D. D., Wahyuningtyas, R. S., Prayudyaningsih, R., Halwany, W., & Murniati. (2021). Restoration of degraded tropical peatland in Indonesia: A review. Land, 10 (11), 1170. https://doi.org/10.3390/land10111170
Zanaga, D., Van De Kerchove, R., Daems, D., De Keersmaecker, W., Brockmann, C., Kirches, G., Wevers, J., Cartus, O., Santoro, M., Fritz, S., Lesiv, M., Herold, M., Tsendbazar, N. E., Xu, P., Ramoino, F., & Arino, O. (2022). ESA WorldCover 10 m 2021 v200 [Data set]. Zenodo. https://doi.org/10.5281/zenodo.7254221
