Potential of Holocene deltaic sequences for subsidence due to peat compaction

Stouthamer, Esther; Asselen, S. van

doi:10.5194/piahs-372-173-2015

Cited by 5 publications

(3 citation statements)

References 16 publications

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“…Human-induced subsidence is especially caused by withdrawal of hydrocarbons and groundwater, loading of soft soils, and shallow groundwater table lowering. Human-induced subsidence rates are usually higher than natural subsidence rates (Stouthamer and van Asselen, 2015).…”

Section: Introductionmentioning

confidence: 98%

The relative contribution of peat compaction and oxidation to subsidence in built-up areas in the Rhine-Meuse delta, The Netherlands

Asselen

Erkens

Stouthamer

et al. 2018

Science of The Total Environment

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Section: Introductionmentioning

confidence: 98%

The relative contribution of peat compaction and oxidation to subsidence in built-up areas in the Rhine-Meuse delta, The Netherlands

Asselen

Erkens

Stouthamer

et al. 2018

Science of The Total Environment

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“…Sediment autocompaction and sea-level rise are both considered responsible for how salt marshes build upward, providing accommodation space (Allen, 2000). Different earth materials have different potential for compaction rates (Stouthamer and van Asselen, 2015). Various processes and factors that contribute to compaction rates include consolidation (extraction of water from pore space in the sediment) and creep (the viscous movement of sediment and sedimentary particles).…”

Section: Sources For Vertical Land Motionmentioning

confidence: 99%

20thto 21stCentury Relative Sea and Land LevelChanges in Northern California:Tectonic Land Level Changes and theirContribution to Sea-Level Rise, Humboldt BayRegion, Northern California

Patton

Williams²,

Anderson

et al. 2023

tekt

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Sea-level changes are modulated in coastal northern California by land-level changes due to the earthquake cycle along the Cascadia subduction zone, the San Andreas plate boundary fault system, and crustal faults. Sea-level rise (SLR) subjects ecological and anthropogenic infrastructure to increased vulnerability to changes in habitat and increased risk for physical damage. The degree to which each of these forcing factors drives this modulation is poorly resolved. We use NOAA tide gage data and ‘campaign’ tide gage deployments, Global Navigation Satellite System (GNSS) data, and National Geodetic Survey (NGS) first-order levelling data to calculate vertical land motion (VLM) rates in coastal northern California. Sea-level observations, highway level surveys, and GNSS data all confirm that land is subsiding in Humboldt Bay, in contrast to Crescent City where the land is rising. Subtracting absolute sea-level rate (~1.99 mm/year) from Crescent City (CC) and North Spit (NS) gage relative sea-level rates reveals that CC is uplifting at ~2.83 mm/year and NS is subsiding at ~3.21mm/year. GNSS vertical deformation reveals similar rates of ~2.60 mm/year of uplift at Crescent City. In coastal northern California, there is an E-W trending variation in vertical land motion that is primarily due to Cascadia megathrust fault seismogenic coupling. This interseismic subsidence also dominates the N-S variation in vertical land motion in most of the study region. There exists a second-order heterogeneous N-S trend in vertical land motion that we associate to crustal fault-related strain. There may be non-tectonic contributions to the observed VLM rates.

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“…Although peat-related subsidence has long been recognized in the Netherlands (Huizinga, 1940;Schothorst, 1977), the rates at which subsidence is proceeding, spatial variability herein, and its influence on modern land use have only recently been addressed (Stouthamer and Van Asselen, 2015; Van den Born et al, 2016). Reconstructing and mapping past peat-related subsidence is an important step to assess and manage present day and future subsidence across the urbanized coastal plain.…”

Section: Introductionmentioning

confidence: 99%

Using 14C-Dated Peat Beds for Reconstructing Subsidence by Compression in the Holland Coastal Plain of the Netherlands

Koster

Cohen

Stafleu³

et al. 2018

Journal of Coastal Research

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Subsidence in the Holland coastal plain of the Netherlands was reconstructed from the vertical displacement of Holocene peat layers below their reference groundwater levels at the time of peat formation. This quantifies the part of subsidence that is due to compression processes and allows specification of the current state of peat compression in a map. 14 C-dating of peat layers found intercalated in the Holocene sequence were used in the reconstruction. This dataset was combined with results from a recent coastal-deltaic plain wide three-dimensional (3D) interpolation of reference palaeogroundwater levels, at which the intercalated peats are thought to have formed before they were buried, compressed, and vertically displaced. Empiric relations between reconstructed displacement and the thickness of overburden were determined and deployed in a national 3D geological subsurface model to establish a subsidence map with continuous cover of the coastal plain. The resulting maps show compressed peat layers under urbanized areas with 1 to 8 m of natural and anthropogenic overburden have subsided 1 to 5 m below the original level of formation. In the agricultural area of the coastal plain, where overburden is merely decimetres thick, consisting of fluvial flood-and sea-ingression deposits, peat generally experienced less than 1 m subsidence. The reference-level reconstruction method is deployable over large coastal plain areas to reconstruct subsidence caused by postdepositional vertical displacement of intercalated peat layers. It could therefore serve as an alternative approach for methods based on soil mechanics, which require input often not available for coastal plains on regional scales.

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Potential of Holocene deltaic sequences for subsidence due to peat compaction

Cited by 5 publications

References 16 publications

The relative contribution of peat compaction and oxidation to subsidence in built-up areas in the Rhine-Meuse delta, The Netherlands

The relative contribution of peat compaction and oxidation to subsidence in built-up areas in the Rhine-Meuse delta, The Netherlands

20thto 21stCentury Relative Sea and Land LevelChanges in Northern California:Tectonic Land Level Changes and theirContribution to Sea-Level Rise, Humboldt BayRegion, Northern California

Using 14C-Dated Peat Beds for Reconstructing Subsidence by Compression in the Holland Coastal Plain of the Netherlands

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