The contribution of peat compaction to total basin subsidence
Subsidence due to peat compaction potentially influences temporal and spatial sedimentation patterns, and therefore alluvial architecture. Quantification of the amount and rate of peat compaction was done based on (1) estimates of the initial dry bulk density of peat, derived from a relation between dry bulk density and organic-matter …Web
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Decomposition of Organic Soils in the Sacramento-San Joaquin Delta
Sources/Usage: Public Domain. The dominant cause of land subsidence in the Sacramento-San Joaquin Delta is decomposition of organic carbon in the peat soils. Under natural waterlogged conditions, the soil was anaerobic (oxygen-poor), and organic carbon accumulated faster than it could decompose. Drainage of peat soils for …Web
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What is Peat Subsidence? | World Resources Institute
Peat subsidence is also triggered by a combination of processes, such as compaction by heavy equipment, the construction of settlements and roads, shrinkage through the contraction of organic fibers when drying and consolidation by loss of water from pores in the peat. Peat subsidence is also caused by the decomposition and …Web
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Peat subsidence and its practical implications: a case study in
At the same time, subsidence is reduced by compaction with heavy machinery as practised in oil palm estates to allow anchorage of trees and to increase the bearing capacity of the land. ... However, in contrast to the quantification of the peat subsidence versus time relationship, a much smaller data set was available for the …Web
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Carbon loss estimates from cultivated peat soils in Norway: a
The compaction component of peat subsidence is expected to increase with peat depth, while loss component is expected to be less depth dependent. As a consequence, the loss component fraction of the subsidence is likely to decrease with increasing peat depth. Our estimate of the loss component (38%) was calculated from …Web
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The relative contribution of peat compaction and oxidation to
Subsidence by peat compaction and oxidation severely impacts built-up coastal areas. • Field data shows that this type of subsidence is highly variable in time and space. • This variability mostly relates to subsurface buildup and characteristics and groundwater depth. • We expect a considerable subsidence potential in many peat-rich ...Web
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Contribution of peat compaction to relative sea‐level rise within
Subsidence due to peat compaction is highly variable in time and space, with local rates of up to 15 mm/yr, depending on sedimentary sequence. This is extremely important information for developing sound delta management strategies. Artificial groundwater table lowering may cause substantial additional subsidence. Subsidence …Web
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Soil Structure and Its Relationship to Shallow Soil Subsidence in
In addition, compaction of aerenchyma and/or root channels under conditions of vegetation death/decline is also a mechanism for soil volume reduction and thus shallow soil subsidence (Chambers et al. 2019). Peat collapse at rates of 11 mm year −1 was reported from a mangrove forest in Honduras due to mass tree mortality and root death …Web
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The contribution of peat compaction to total basin subsidence
In the Rhine-Meuse delta, peat compaction has contributed considerably to total basin subsidence. Depending on the thickness of the compressible sequence, …Web
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Double trouble: subsidence and CO2 respiration due to 1,000
Coastal plains are amongst the most densely populated areas in the world. Many coastal peatlands are drained to create arable land. This is not without consequences; physical compaction of peat and its degradation by oxidation lead to subsidence, and oxidation also leads to emissions of carbon dioxide (CO2). This study complements …Web
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Monitoring shallow subsidence in cultivated peatlands
especially been caused by peat oxidation, peat compaction and peat mining in the Holocene sequence, starting about 1000 years ago (Erkens et al., 2016). Large scale peat mining continued until the late 19th century, after which subsidence has been mainly caused by peat compaction and oxidation. Peat compaction is the mechanical process …Web
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Soil carbon dioxide emissions due to oxidative peat decomposition in …
Soil carbon dioxide (CO 2) efflux was measured continuously for two years using an automated chamber system in an oil palm plantation on tropical peat.This study investigated the factors controlling the CO 2 efflux and quantified the annual cumulative CO 2 emissions through soil respiration and heterotrophic respiration, which is equivalent to …Web
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Land | Free Full-Text | Carbon Losses from Topsoil in Abandoned Peat
Wösten et al., 1997 and Ansahri et al., 2021 [19,49] used oxidized subsidence factor 0.6 to calculate C loss from each subsided peat cm, using assumption that 60% of subsidence is peat mineralization but 40% is compaction. In these studies, variations in carbon loss values within the observed range can be partly attributed to …Web
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Measurements versus Estimates of Soil Subsidence and
The size of peat subsidence at Solec peatland (Poland) over 50 years was determined. The field values for subsidence and mineralization were compared with estimates using 20 equations. The subsidence values derived from equations and field measurements were compared to rank the equations. The equations that include a …Web
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LETTERS Mississippi Delta subsidence primarily caused by …
the compaction of Holocene coastal organic-rich deposits and demonstrated its profound stratigraphic implications, and recent field investigations17 continue to single out peat compaction as a key control of coastal evolution. Nevertheless, although present-day compaction rates ('shallow subsidence') have been measuredWeb
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Preface: Land subsidence processes | Hydrogeology Journal
Peat oxidation results in volume reduction (subsidence) and CO 2 gas emissions. In addition, the drained peat loses its buoyancy and loads the underlying peat that starts to consolidate, resulting in further subsidence. Whereas shrinkage and consolidation contribute mostly to subsidence in the first years after drainage, the …Web
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Factors Controlling Peat Compaction in Alluvial
Subsidence due to peat compaction may have important implications in alluvial floodplains, because it leads to wetland loss, land inundation, and damage to buildings and infrastructure. Furthermore, it potentially influences spatial and temporal river sedimentation patterns, and hence the evolution of alluvial floodplains.Web
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Carbon loss from a deforested and drained tropical peatland over four
Repeat measurement of peat surface elevation and subsidence (via stakes anchored in the mineral substrate or via remote sensing) may encompass fire events (Hoyt et al., 2020, Wösten et al., 1997) but requires assumptions about compaction (changes in peat bulk density and C density) and cannot account for within-peat heterotrophic …Web
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Long-term trajectory and temporal dynamics of tropical peat …
In this study, we analyse temporal variations and the long-term trajectory of subsidence in a uniquely long-term (12 year), large-scale and methodologically …Web
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Effects of peat compaction on delta evolution: A review on …
Peat is common in many distal parts of Holocene deltas, which are often densely populated. It is known that land subsidence due to peat compaction may have …Web
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World's Largest Tropical Peatland Subsidence Study Published
Over time, subsidence increases the risk of periodic flooding or inundation of land, and may lead to a reduction in productivity. Subsidence results from a combination of compaction (shrinkage) of the dry peat, and accelerated decomposition following its exposure to oxygen, which contributes to CO 2 emissions from drained peatlands.Web
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Factors Controlling Peat Compaction in Alluvial
Subsidence due to peat compaction may have important implications in alluvial floodplains, because it leads to wetland loss, land inundation, and damage to …Web
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Effects of soil subsidence on plantation agriculture in
Subsidence occurs due to a combination of compaction (compression of aerated peat), consolidation (compression of peat below the water table due to loss of buoyancy of overlaying peat), and oxidation (aerobic decomposition of organic matter to CO 2) (Evans et al. 2019). Given that peat contains around 90% water, draining the water out of theWeb
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A globally robust relationship between water table decline, subsidence
Pristine peatlands—i.e., peatlands (where peat soil has at least 30% dry organic matter and a peat depth generally exceeding 40 cm 1) that have thus far not been directly impacted by ...Web
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Subsidence
Subsidence hazards involve either the sudden collapse of the ground to form a depression or the slow subsidence or compaction of the sediments near the Earth's surface. ... Recall that elastic deformation is reversible, …Web
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Effects of peat compaction on delta evolution: A review on …
For example, peat subsidence has been used as a measurable indicator to determine carbon loss by observing changes to peat depth [13]. van Asselen et al. [43] argued that the compaction process of ...Web
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Peat subsidence | Waikato Regional Council
Other processes that can contribute to peat subsidence include fire, compaction due to stock treading and machinery, wind and water erosion. Peat subsidence generally decreases over time, but will continue as long as the soils remain drained, until the drained peat disappears.Web
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Potential of Holocene deltaic sequences for subsidence due to peat
Compared to existing estimates, present subsidence rates due to peat compaction predicted by the model are much lower (<0.2 mm!yr) where peat is overlain by a substantially thick (>-1 m) clastic ...Web
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(PDF) Pressurized drainage can effectively reduce …
Therefore, we quantified subsidence due to peat compaction and oxidation in built-up areas in the Rhine-Meuse delta, The Netherlands, using lithological borehole data and measurements of dry …Web
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Differences in CO2 Emissions on a Bare-Drained Peat …
The drainage and cultivation of peatlands will lead to subsidence and mineralisation of organic matter, increasing carbon (C) loss as more CO2 is emitted. There is little information about carbon …Web
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