Profile of dielectric constant of peat in Ogan Komering Ilir Regency, Indonesia using SAR Sentinel-1 and ground penetrating radar

Marpaung, Fiolenta; Sumirah,; Sumargana, Lena; Nugroho, Djoko

doi:10.1088/1755-1315/500/1/012041

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…This low resistivity response might cause by the waterlogged condition in the coastal wetland of the Kuan Kreng Peat swamp forest. The GPR velocity from this study is consistent with previous studies ranging between 0.033 and 0.050 m/ns, particularly in tropical peatland ranging from 0.036 to 0.040 m/ns (e.g., Comas et al, 2015;Comas et al, 2017;Marpaung et al, 2020;Pezdir et al, 2021).…”

Section: Physical and Chemical Characteristicssupporting

confidence: 92%

Geophysical and chemical characteristics of peatland in coastal wetland, southern Thailand

Phiranram,

Chenrai,

Jirapinyakul

et al. 2024

Front. Mar. Sci.

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Peatlands, as an important carbon sink, store a large amount of atmospheric carbon that is vulnerable to becoming a carbon emission source due to the disturbance of the peat layer by natural and anthropogenic processes. The Kuan Kreng peat swamp forest is the second largest peatland in Thailand and is in coastal wetland serving for carbon stock in the subsurface. To assess carbon stock in peatland, the thickness and distribution of the peat layer are necessary. This study determines physical and chemical characteristics of the peatlands in the coastal wetland, southern Thailand by conventional core study and geophysical surveys, including ground penetrating radar (GPR) and electrical resistivity imaging (ERI). There is a significant relationship between chemical and physical properties from the peat layer, which is useful to approximately predict the physical properties and peat layers in the geophysical profiles. The resistivity profiles exhibit high resistivity response, peat between 21.9 and 145.0 ohm-m, interpreted as the peat layers in the shallow subsurface. The high resolution GPR profiles provide an average GPR velocity in peat of 0.040 m/ns and a relative dielectric constant of 54.9 for the peat layers. The peat layer is characterized by a high amplitude of reflection in the GPR profiles. The thickness of the peat layers was estimated from the geophysical surveys and the drilling cores having an average thickness of 18 cm. Average values of bulk density (0.19 g/cm3) and TOC (31.18 wt. %) from the drilling core samples are used to calculate the carbon density in the peat layers giving a result of 59.24 Kg C/m3. Hence, the carbon stock at the Kuan Kreng peat swamp forest is estimated at least 7.53 megaton carbon, which is much higher than aboveground biomass carbon in this area. The innumerably high amount of carbon stock could raise awareness of peatland disturbances.

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Section: Physical and Chemical Characteristicssupporting

confidence: 92%

Geophysical and chemical characteristics of peatland in coastal wetland, southern Thailand

Phiranram,

Chenrai,

Jirapinyakul

et al. 2024

Front. Mar. Sci.

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“…Wetland soil moisture profiles must be analyzed because the wetland is recognized by a change in soil moisture or groundwater level. In an undisturbed forest, soil moisture and groundwater levels have a low value during the dry season and have a high value during the rainy season (Marpaung, et al, 2020). The complexity of surface water dynamics in wetland affects the accuracies of maps produced with Sentinel-1, both for temporarily flooded and permanently flooded wetlands.…”

Section: Profile Of Soil Moisturementioning

confidence: 99%

Wetlands Delineation with Various Land Covers Using SAR Sentinel-1A Surface Backscatter Ratio

Santosa

Marpaung²

2022

Jurtekling

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ABSTRAK Wilayah Kabupaten Ogan Komering Ilir (OKI) yang didominasi lahan basah memerlukan perencanaan tata guna lahan yang tepat untuk mendukung program kesejahteraan dan pelestarian lingkungan. Program tersebut perlu disusun berdasarkan data lahan basah yang tepat dalam penetapan tata guna lahan. Artikel ini mengeksplorasi pemanfaatan data satelit Synthetic Aperture Radar (SAR) Sentinel-1A untuk mengidentifikasi area lahan basah dengan berbagai tutupan lahan untuk menyediakan peta lahan basah skala menengah secara cepat. Peta kelembaban tanah diambil dari platform SEPAL untuk memantau pola kelembaban tanah sepanjang 2015–2017. Profil hamburan balik polarisasi VV (?VV) dan polarisasi VH (?VH) dianalisis untuk data sentinel-1 dari tahun 2015 hingga 2018. Rasio antara nilai VV dan VH (?VV/?VH) serta tekstur VV dan VH digunakan sebagai acuan untuk menentukan lahan basah; ditentukan pada analisis eksperimental profil kelembaban tanah, konstanta dielektrik, dan nilai koefisien hamburan balik dari penelitian lain. Rasio VH/?VV yang rendah (berkisar antara 1,3 dan 1,6) terletak di bagian utara Kabupaten OKI dan sebagian besar ditutupi oleh tanaman akasia. Estimasi ini sejalan dengan peta kesatuan hidrologis gambut dan data validasi berdasarkan ground check lapangan. Secara keseluruhan, rasio ?VH/?VV tahunan bernilai relatif sama, dengan nilai variasi yang kecil. Studi ini menemukan kemampuan Sentinel-1A untuk keperluan klasifikasi tipe vegetasi lahan basah yang akurat, terutama lahan basah bervegetasi herba atau semak, tetapi tidak untuk lahan basah bervegetasi tinggi. Kata kunci : SAR Sentinel-1A, lahan basah, backscatter, program konservasi, keberlanjutan ABSTRACT Ogan Komering Ilir (OKI) Regency area, dominated by wetlands, requires appropriate land use planning to support welfare and environmental conservation programs. This article explores the utilization of Synthetic Aperture Radar (SAR) Sentinel-1A satellite data to identify wetland areas with various land covers to provide a medium scale wetland map quickly. The soil moisture maps were captured from the SEPAL platform to monitor soil moisture patterns throughout 2015–2017. The backscattering profiles of VV (?VV) polarization and VH polarization (?VH) were then analyzed for data sentinel-1A from 2015 to 2018. The ratio between VV and VH (?VV/?VH) values and textures of VV and VH is used as a reference to determine the wetland area; determined on an experimental analysis of soil moisture profile, dielectric constants, and backscattering coefficient values from other studies. The low ?VH/?VV ratio (ranges between 1.3 and 1.6) is located in the northern OKI regency and is mainly covered by acacia plantations. These estimations align with the Peat Hydrology Unit maps and ground check as validation data. Overall, the ?VH/?VV ratio is relatively the same yearly, with a small variation value. This study found the capability of Sentinel-1A for the accurate classification of wetland vegetation types, primarily herbaceous or shrubby vegetated wetlands, but not for high-vegetated wetlands. Keywords : SAR Sentinel-1A, wetland, backscatter, conservation programs, sustainability

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Application of Synthetic Aperture Radar image processing in magnetic susceptibility inversion

Feng

Guo

Yang

et al. 2022

2022 2nd International Conference on Consumer Electronics and Computer Engineering (ICCECE)

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Profile of dielectric constant of peat in Ogan Komering Ilir Regency, Indonesia using SAR Sentinel-1 and ground penetrating radar

Cited by 3 publications

References 5 publications

Geophysical and chemical characteristics of peatland in coastal wetland, southern Thailand

Geophysical and chemical characteristics of peatland in coastal wetland, southern Thailand

Wetlands Delineation with Various Land Covers Using SAR Sentinel-1A Surface Backscatter Ratio

Application of Synthetic Aperture Radar image processing in magnetic susceptibility inversion

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