scholarly journals Modelling the performance of bunds and ditch dams in the hydrological restoration of tropical peatlands

2022 ◽  
Author(s):  
Santosa Sandy Putra ◽  
Andy J. Baird ◽  
Joseph Holden
Keyword(s):  
Tropical Peatlands

LATERAL ADVECTION LIMITS METHANE EMMISSIONS FROM TROPICAL PEATLANDS

2017 ◽  
Author(s):  
Charles F. Harvey ◽  
◽  
Alison Hoyt ◽  
Alexander R. Cobb ◽  
Laure Gandois ◽  
...  
Keyword(s):  
Tropical Peatlands ◽  
Lateral Advection

scholarly journals The Use of Subsidence to Estimate Carbon Loss from Deforested and Drained Tropical Peatlands in Indonesia

Forests ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 732
Author(s):  
Gusti Z. Anshari ◽  
Evi Gusmayanti ◽  
Nisa Novita
Keyword(s):  
Water Table ◽  
Carbon Emission ◽  
Bottom Layer ◽  
Groundwater Table ◽  
Microbial Oxidation ◽  
Tropical Peat ◽  
Subsidence Rate ◽  
Tier 1 ◽  
Tropical Peatlands ◽  
Physical Changes

Drainage is a major means of the conversion of tropical peat forests into agriculture. Accordingly, drained peat becomes a large source of carbon. However, the amount of carbon (C) loss from drained peats is not simply measured. The current C loss estimate is usually based on a single proxy of the groundwater table, spatially and temporarily dynamic. The relation between groundwater table and C emission is commonly not linear because of the complex natures of heterotrophic carbon emission. Peatland drainage or lowering groundwater table provides plenty of oxygen into the upper layer of peat above the water table, where microbial activity becomes active. Consequently, lowering the water table escalates subsidence that causes physical changes of organic matter (OM) and carbon emission due to microbial oxidation. This paper reviews peat bulk density (BD), total organic carbon (TOC) content, and subsidence rate of tropical peat forest and drained peat. Data of BD, TOC, and subsidence were derived from published and unpublished sources. We found that BD is generally higher in the top surface layer in drained peat than in the undrained peat. TOC values in both drained and undrained are lower in the top and higher in the bottom layer. To estimate carbon emission from the top layer (0–50 cm) in drained peats, we use BD value 0.12 to 0.15 g cm−3, TOC value of 50%, and a 60% conservatively oxidative correction factor. The average peat subsidence is 3.9 cm yr−1. The range of subsidence rate per year is between 2 and 6 cm, which results in estimated emission between 30 and 90 t CO2e ha−1 yr−1. This estimate is comparable to those of other studies and Tier 1 emission factor of the 2013 IPCC GHG Inventory on Wetlands. We argue that subsidence is a practical approach to estimate carbon emission from drained tropical peat is more applicable than the use of groundwater table.

scholarly journals Degradation of Southeast Asian Tropical Peatlands and Integrated Strategies for Their Better Management and Restoration

2021 ◽  
Author(s):  
Shailendra Mishra ◽  
Susan E. Page ◽  
Alexander R. Cobb ◽  
Ser Huay Lee Janice ◽  
A. Jonay Jovani‐Sancho ◽  
...  
Keyword(s):  
Southeast Asian ◽  
Integrated Strategies ◽  
Tropical Peatlands

scholarly journals Towards an improved understanding of greenhouse gas emissions and fluxes in tropical peatlands of Southeast Asia

2020 ◽  
Vol 53 ◽  
pp. 101881 ◽  
Author(s):  
Prashant Kumar ◽  
Adedeji A. Adelodun ◽  
Md Firoz Khan ◽  
Haruni Krisnawati ◽  
Fernando Garcia-Menendez
Keyword(s):  
Southeast Asia ◽  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Gas Emissions ◽  
Tropical Peatlands

Revisiting tropical peatlands in Indonesia: Semi-detailed mapping, extent and depth distribution assessment

Geoderma ◽  
2021 ◽  
Vol 402 ◽  
pp. 115235
Author(s):  
Markus Anda ◽  
Sofyan Ritung ◽  
Erna Suryani ◽  
Sukarman ◽  
Muhammad Hikmat ◽  
...  
Keyword(s):  
Depth Distribution ◽  
Tropical Peatlands

scholarly journals Towards sustainable management of Indonesian tropical peatlands

2017 ◽  
Vol 25 (6) ◽  
pp. 683-701 ◽  
Author(s):  
Saritha Kittie Uda ◽  
Lars Hein ◽  
Elham Sumarga
Keyword(s):  
Sustainable Management ◽  
Tropical Peatlands

Open digital mapping as a cost-effective method for mapping peat thickness and assessing the carbon stock of tropical peatlands

Geoderma ◽  
2018 ◽  
Vol 313 ◽  
pp. 25-40 ◽  
Author(s):  
Rudiyanto ◽  
Budiman Minasny ◽  
Budi Indra Setiawan ◽  
Satyanto Krido Saptomo ◽  
Alex B. McBratney
Keyword(s):  
Carbon Stock ◽  
Cost Effective ◽  
Digital Mapping ◽  
Cost Effective Method ◽  
Tropical Peatlands

Open digital mapping for accurate assessment of tropical peatlands

2019 ◽  
pp. 3-8
Author(s):  
B. Minasny ◽  
Rudiyanto ◽  
Y. Sulaeman ◽  
B.I. Setiawan
Keyword(s):  
Accurate Assessment ◽  
Digital Mapping ◽  
Tropical Peatlands

scholarly journals Drainage of organic soils and GHG emissions: Validation with country data

2020 ◽  
Author(s):  
Giulia Conchedda ◽  
Francesco N. Tubiello
Keyword(s):  
East Asia ◽  
Oil Palm ◽  
Ghg Emissions ◽  
Field Measurements ◽  
Organic Soils ◽  
Past Century ◽  
South East Asia ◽  
Tropical Peatlands ◽  
Carbon Dioxide Co2 ◽  
Reported Data

Abstract. Drainage of large areas with organic soils was conducted over the past century to free land for agriculture. A significant acceleration of such trends was observed in recent decades in South-East Asia, largely driven by drainage of tropical peatlands, an important category of organic soils, for cultivation of oil palm. This work presents methods and main results of a new methodology developed for FAOSTAT, whereby the overlay of dynamic maps of land cover and the use of information on histosols allows the production of a global annual dataset of drained area and emissions over a time series, covering the period 1990–2019. This is an improvement over the existing FAO approach, which had produced only a static map of drained organic soils for the year 2000. Results indicate that drained area and emissions increased by 13 percent globally since 1990, reaching in 2019 24 million ha of drained organic soils, with world total emissions of 830 million tonnes of carbon dioxide (CO2) equivalent. Of these totals, the largest contribution was from the drainage of tropical peatlands in South-East Asia, generating nearly half of global emissions. Results were validated against national data reported by countries to the UN Climate Convention and to well established literature. Overall, the validation yielded a good agreement with these sources. FAOSTAT estimates explained about 60 percent of the variability in official country reported data. The predicted emissions were virtually identical – with over 90 percent of explained variability – to official data from Indonesia, currently the top emitting country by drained organic soils. Also, calculated emissions factors for oil palm plantations in Indonesia and Malaysia were in the same range and very close to emissions factors derived from detailed field measurements. This validation suggests that the FAO estimates may be a useful and sound reference in support of countries reporting needs. Data are made available as open access via the Zenodo portal (Tubiello and Conchedda, 2020) with DOI https://doi.org/10.5281/zenodo.3942370.

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