peat compaction subsidence

The relative contribution of peat compaction and oxidation ...

Sep 15, 2018· In the built-up areas we investigated there is still much potential for further subsidence due to peat compaction. • The amount of subsidence due to oxidation also varies in space and time, mainly depending on the depth below the surface of the groundwater table, and of the top of the peat …

Flooding projections from elevation and subsidence …

Flooding projections from elevation and subsidence models for oil palm plantations in the Rajang Delta peatlands, Sarawak, Malaysia. Flooding projections from elevation and subsidence models for oil palm plantations in the Rajang Delta peatlands, Sarawak, Malaysia ... Following an initial phase of physical compaction and consolidation of the peat

Peat Compaction as a Premier Driver of Mississippi Delta ...

Peat Compaction as a Premier Driver of Mississippi Delta Subsidence ... of coastal subsidence (accelerated relative sea-level rise, shoreline erosion, and wetland loss) and its threats to coastal ...

Double trouble: subsidence and CO respiration due to 1,000 ...

compaction of peat and its degradation by oxidation lead to subsidence, and oxidation also leads to emissions of carbon dioxide (CO 2). This study complements existing studies by quantifying total land subsidence and associated CO 2 respira-tion over the past millennium in the Dutch coastal peatlands,

subsidence – California Water Library

Age Determination of the Remaining Peat in the Sacramento–San Joaquin Delta, California, USA $ 0.00. ... Regional aquifer-system compaction and land subsidence accompanying groundwater abstraction in susceptible aquifer systems in the USA is a challenge for managing groundwater resources...

Peat compaction in deltas : implications for Holocene ...

Therefore, peat compaction potentially leads to high amounts of subsidence in deltas. The main objective of this research was to quantify subsidence due to peat compaction in Holocene fluvial-deltaic settings and to evaluate effects of peat ... read more compaction on delta evolution.

Peat Compaction as a Premier Driver of Mississippi Delta ...

Compaction is capable of accounting for a large portion of the exceptionally high rates of land surface subsidence, relative sea-level rise, and coastal wetland loss in the Mississippi Delta, and it is likely a significant cause of subsidence in organic-rich, low-lying coastal plains elsewhere.

Using 14C-Dated Peat Beds for Reconstructing Subsidence by ...

In the peat-rich Holocene coastal plain of the Netherlands (ca. 17,000 km 2), large areas (ca. 50%) are situated below sea level due to subsidence by peat compression and oxidation (Figure 2A).The subsidence is to a large extent human induced and commenced around AD 1000, when coastal wetlands were extensively drained for agricultural purposes (Borger, 1992).

The relative contribution of peat compaction and oxidation ...

data and laboratory analyzes. We reconstructed subsidence due to peat compaction and oxidation over the last 1000 years of up to ˘4 m, and recent subsidence rates of up to ˘140 mm/yr, averaged over an 11-year time span. The amount and rate of subsidence due to peat compaction and oxidation is variable in time and space,

Potential of Holocene deltaic sequences for subsidence due ...

potential for subsidence due to peat compaction are (1) the thickness of organic, mainly peat and clay, layers in the sub-surface, (2) the organic matter content of these layers, and (3) the effective stress, which is a function of the weight of the overburden and pore water pressures (van Asselen et al.,

Land Subsidence: Cause & Effect - CA Water

Land Subsidence: Cause & Effect. Land subsidence—the loss of surface elevation due to removal of subsurface support—occurs in nearly every state in the United States. Subsidence is one of the most diverse forms of ground failure, ranging from small or local collapses to broad regional lowering of …

Mississippi Delta subsidence primarily caused by ...

Peat is abundant in the Mississippi Delta and compaction has frequently been invoked as a major contributor to land subsidence and relative sea-level (RSL) rise 19.

Compaction and Subsidence - Schlumberger

Baker Atlas. FCMT Formation Compaction Monitoring Tool is a mark of Halliburton. VISAGE is a mark of V.I.P.S. Pressure drawdown in a producing field can lead to reservoir compaction, movement of the overburden and subsidence of the surface above the reservoir. This compaction and subsidence can prove costly, both for production and surface ...

Best ManageMent Practices FOr OiL PaLM cULtiVatiOn On …

Data on peat subsidence and oil palm yields were collected from 10 blocks of oil palm of different ages planted on peat of different depths ranging from shallow to deep peat. A regression equation was established with subsidence data as a dependent variable, while ground water-table and time with quadratic effects were independent variables.

Subsidence due to peat compaction and oxidation in built ...

For example, subsidence in a sequence with a heavily loaded peat layer will have been mostly caused by peat compaction, while subsidence in a sequence with a thick peat layer with no or a thin clastic overburden, and a relatively deep groundwater table, will have been mostly caused by oxidation.

Subsidence calculation - Tygron Support Wiki

The fraction of the soil composed of peat, for the calculation of the compaction component of subsidence. 0.4 When absent, the attribute DEFAULT_PEAT_FRACTION of the overlay is used. Valid fraction range is 0.0 to 1.0. Subsidence SUBSIDENCE Whether or not subsidence …

Sediment compaction rates and subsidence in deltaic plains ...

Natural sediment compaction in deltaic plains influences subsidence rates and the evolution of deltaic morphology. Determining compaction rates requires detailed knowledge of subsurface geotechnical properties and depositional history, neither of which is often readily available.

LAND SUBSIDENCE IN THE SACRAMENTO- SAN JOAQUIN …

Several possible causes of subsidence in the Sacramento- San Joaquin Delta, in decreasing order of importance, include: (1) near-surface loss of organic soils, such as peat, caused by aerobic decomposition (oxidation) and wind erosion; (2) intermediate-depth compaction …

Peat subsidence | Waikato Regional Council

Compaction does not always lead to subsidence.This can be illustrated by considering a situation in which a uniform peat layer overlies an incompressible subsurface ().In this scenario, it is assumed that peat growth can keep up with the rate of groundwater table rise.

Peat compaction in the long term - WUR

subjects are distinguished in this research, namely, (1) peat compaction in peat lands and the (2) complexity and dynamics in spatial planning. Soil subsidence caused by peat compaction is a process that, in several ways, has impact on this landscape and the users of the landscape. In general peat compaction can be caused by three

Subsidence due to peat decomposition in the Netherlands

Peat Peat Ground water table Ditch Peat oxidation process - Peat is composed of organic material. - Peat oxides when it is in contact with the air, i.e. reduces in volume producing the consequent subsidence - Then ground water level get closer to the surface. - …

Carbon loss estimates from cultivated peat soils in Norway ...

of subsidence rates, (2) changes in ash contents, and (3) soil CO 2 flux measurements. Subsidence of cultivated peat soils averaged about 2.5 cm year-1. We estimated that peat loss and compaction were respectively responsible for 38% and 62% of the total subsidence during a 25-year period after drainage.

SUBSIDENCE DUE TO PEAT ... - Doris InSAR Processor

ring of cities, Randstad Holland. The derived subsidence rates will be interpreted and related to processes in the shallow subsurface. This paper presents preliminary re-sults of the investigation. Key words: PS InSAR, subsidence, peat compaction. 1. INTRODUCTION The position of the Dutch shoreline has varied over time

Subsidence - Banglapedia

Subsidence a type of mass movement that involves principally a downward movement/ displacement of surface material caused by natural or artificial removal of underlying support. It is the net sum of tectonic activity, isostatic adjustment, sediment compaction, fluid withdrawal and sea level rise. Most deltaic areas experience relatively great subsidence balanced by large input of river borne ...

Subsidence - Wikipedia

Subsidence is the sudden sinking or gradual downward settling of the ground's surface with little or no horizontal motion. The definition of subsidence is not restricted by the rate, magnitude, or area involved in the downward movement. It may be caused by natural processes or by human activities.

(PDF) Mississippi Delta subsidence primarily caused by ...

Mississippi Delta subsidence primarily caused by compaction of Holocene strata ... lags using the assumed large peat compaction value results in the destruction of the associated sedimentary ...

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.

Contribution of peat compaction to relative sea-level rise ...

Quantify the amount and rate of subsidence due to peat compaction in Holocene deltaic sequences based on field data. 2. Develop a peat compaction model, calibrated with field data, to better understand and predict subsidence due to peat compaction over a range of temporal and spatial scales.