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Peat compaction floodplain

  • Scotland's Soils - soil maps

    The map shows the vulnerability of subsoils to compaction by traffic. It covers most of Scotlands cultivated agricultural land area. The subsoil compaction risk gives information on the likelihood of the subsoil becoming compacted due to heavy machinery in four classes (Extremely vulnerable, Very vulnerable, Moderately vulnerable or Not particularly vulnerable) based on the soil texture and

  • Factors Controlling Peat Compaction in Alluvial

    Feb 01, 2010· The dominant factors influencing peat compaction are: (1) organic-matter content, (2) stress imposed on a peat layer, and, to a lesser extent, (3) plant species composition. In an alluvial setting, crevasse splays and natural levees are sites that are most susceptible to high amounts of peat compaction at short timescales (10 0 10 2 years

  • Effects of peat compaction on delta evolution: A review on

    Peat is most compressible of all natural soils. Compaction of peat layers potentially leads to substantial amounts of land subsidence. 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 serious societal implications in such areas, as it may cause damage to construction works and lead to

  • Mass Stabilization as a Ground Improvement Method for Soft

    Sep 19, 2018· Construction of road embankments or other infrastructures on soft peat is a challenge. The main problems are high compressibility and rather low undrained shear strength of peat. Mass stabilization provides a solution to improve the properties of a peaty subgrade. Mass stabilization is a ground improvement method, where hardened soil mass is created by adding binder into soil and by

  • Agronomic Management of Oil Palms on Deep Peat

    drainage, soil compaction, soil preparation, and mineral fertilizer, as well as practical experience and knowledge of peat and peat management, is required for successful oil palm development on these problem soils. More than 76 percent of the worlds tropical peat

  • Soils: Their forgotten role in flood management

    Soils: Their forgotten role in natural flood management. There is a growing interest in the use of natural flood management to slow the flow of water through river catchments. Yog Watkins calls for more attention to be paid to the importance of soils in holding back the water, and reports on a preliminary trial of a soil conditioner that may

  • Design criteria for bioretention - Minnesota Stormwater Manual

    Feb 17, 2021· 7.1.1 Wisconsin peat moss replacement (Bannerman, 2013) 7.1.2 Layered systems; Note that if underlying soils are ripped to alleviate compaction, the requirement is a 2 foot minimum between the bottom of the ripped zone and a 3 foot minimum from the bottom of the infiltration practice. If there is only a 3 foot separation distance between

  • Subsidence - a progressive problem University of Leicester

    Subsidence - a progressive problem. Peatland land use change, for example, in Indonesia and Malaysia to oil palm and pulp wood plantations or in the UK for agricultural production, increases the flood risk in low lying peatland areas. Deforestation and drainage of peatlands in order to prepare the land for plantation crops leads to soil subsidence.

  • Contribution of peat compaction to relative sea-level rise

    Dec 01, 2011· Modern and forecasted flooding of deltas is accelerated by subsidence of Holocene deposits. Subsidence caused by tectonics, isostasy, sediment compaction and anthropogenic processes, combined with eustatic sea-level rise, results in drowning and increased flood risk within densely populated deltas. Many deltaic sedimentary successions include substantial amounts of peat,

  • FLOATING ROADS ON PEAT - ROADEX Network

    Peat in its normal, unloaded state, is a very weak material on which to build a road but if it can be carefully loaded, allowing time for it to consolidate and increase in strength, it can be transformed into a very useable foundation. This section considers the suitability of peat as a material on which to build a road and its behaviour when

  • GUIDELINES FOR EMBANKMENT CONSTRUCTION

    4. COMPACTION CONTROL The specifications require that each lift of the embankment be compacted to the satisfaction of the Engineer. If the Engineer elects to test, satisfactory compaction is defined as 90% (95% in the Density

  • Novel Quantification of Shallow Sediment Compaction by GPS

    Jun 24, 2020· Natural compaction of Holocene age deposits, often amplified by peat soil oxidation due to surface water drainage, is one of the main processes that causes coastal subsidence. Subsidence rates can exceed 1020 mm/yr depending on thickness, age and characteristics of the sedimentary sequence (Brain, 2016 ; Dixon et al., 2006 ; Törnqvist et al

  • Peat - Wikipedia

    Peat (/ p iː t /), sometimes known as turf (/ t ɜːr f /), is an accumulation of partially decayed vegetation or organic matter.It is unique to natural areas called peatlands, bogs, mires, moors, or muskegs. The peatland ecosystem covers 3.7 million square kilometres (1.4 million square miles) and is the most efficient carbon sink on the planet, because peatland plants capture carbon dioxide

  • Part 645 Construction Inspection National Engineering

    Part 645 National Engineering Handbook Chapter 8 Earthfill and Rockfill 8ii (210VINEH, Amend. 74, /CTOBER 2015) Figure 81 Disk penetrating into preceding lift 86 Figure 82 Proctor curve 88 Figure 83 Standard and Modified Proctor effort as specified 89 in ASTM D698 and ASTM D1557

  • HIGHWAY EMBANKMENT CONSTRUCTION OVER SOFT

    The thicker peat deposits, which were encountered to depths of up to 4.6 m below ground surface at test hole locations, are generally limited to areas near the peripheries of the lowlands. Measured water contents in the peat deposits were typically in the range of

  • Contribution of peat compaction to relative sealevel rise

    Apr 28, 2013· The model quantifies spatial and temporal trends in peat compaction within fluvialdominated Holocene flood basin sequences of different compositions. 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.

  • The contribution of peat compaction to total basin

    Mar 01, 2011· In the RhineMeuse delta, peat compaction has contributed considerably to total basin subsidence. Depending on the thickness of the compressible sequence, weight of the overburden and organicmatter content of peat, subsidence of up to approximately 3 m in a 10m thick Holocene sequence has been calculated.

  • 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. As the vast majority of peatlands occur in cold temperate regions,

  • Deltaic floodplains development and wetland ecosystems

    Apr 07, 2016· The Ganges delta has a great importance for its exceptional hydro-geological settings and deltaic floodplain wetland ecosystems. The floodplain is formed by the deposition of the Ganges, Brahmaputra and Meghna River. The physical characteristics of floodplains, geographic location, the multiplicity of rivers and the monsoon climate render wetland ecosystems highly vulnerable to natural

  • Physical and hydrological properties of peat as proxies

    in peat, i.e. the formation of horizons characterised by compaction and mineralisation accompanied by alterations of the structure and physical and chemical properties of the peat (Schwärzel 2000, Zeitz & Velty 2002, Ilnicki & Zeitz 2003). Furthermore, it is known that peat compaction and mineralisation lead to a

  • 205 - Roadway Earthwork - MediaWiki

    May 06, 2021· The peat that is excavated or displaced is entered as cut on the peat excavation volume sheet. Excavation and displacement of peat should be allowed only per limits of the peat excavation stakes, as set prior to the operation. A slide-out beyond the peat excavation stakes is not considered peat excavation.

  • Compaction rates and paleo-sea levels along the delta

    Compaction rates and paleo-sea levels 43 RESULTS AND DISCUSSION Paleoenvironments and paleo-sea levels Most of the cores are complete upward sequences consisting of basal shallow-marine clay, transitioning into a mangrove-peat that in turn is overlain by beach sand capped by fluvial sand and mud transitioning to floodplain clays (Fig. 3).

  • FACTORS CONTROLLING PEAT COMPACTION IN ALLUVIAL

    The dominant factors influencing peat compaction are: (1) organic- matter content, (2) stress imposed on a peat layer, and, to a lesser extent, (3) plant species composition. In an alluvial setting,

  • Bypass Widening the Elkhorn Basin: A Multi Benefit

    Flood Control, Floodplain Habitat and Fish Passage Jai Singh, cbec eco engineering, [email protected] water pressure in the peat and the postcyclic settlement of the peat has been measured. Test We observe that consolidation from material addition causes compaction to be the main contributor following levee repair in some, but not

  • 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 in deltas : implications for Holocene

    Only if the maximum peat compaction potential at a certain location has been reached, while at a nearby location on the floodplain rates of subsidence due to peat compaction are still relatively

  • Factors Controlling Peat Compaction in Alluvial

    Feb 01, 2010· The dominant factors influencing peat compaction are: (1) organic-matter content, (2) stress imposed on a peat layer, and, to a lesser extent, (3) plant species composition. In an alluvial setting, crevasse splays and natural levees are sites that are most susceptible to high amounts of peat compaction at short timescales (10 0 10 2 years

  • A homeowners guide to having the peat moss replaced in

    calibrated flood systems causing premature peat failure. 3) Perform the water quality sample as early in the summer as allowable by the local health department. Even under ideal circumstances peat systems on the Outer banks get pushed to their limits by families on vacation. Higher than normal water use and unfamiliarity with what should and

  • Chapter 18: Soils and Foundations, Building Code 2018 of

    In flood hazard areas established in Section 1612.3, grading, fill, The compaction shall be verified by special inspection in accordance with Section 1705.6. organic silt, organic clays, peat or unprepared fill shall not be assumed to have a presumptive load-bearing capacity unless data to substantiate the use of such a value are submitted.

  • Hydrological and economic effects of oil palm cultivation

    An aspect of peat conversion that has received less attention to date, at least in a South East Asian context, is that peat drainage leads to soil subsidence. Peat consists of some 90% water; hence, besides leading to more rapid discharge and potentially increased flood risk downstream, drainage also leads to compaction of peat,

  • Effects of peat compaction on delta evolution: A review on

    Jan 01, 2009· Considering compaction of peat, a significant amount of the volume reduction occurs during the peat formation phase, mainly due to micro-biological processes. In principal, peat formation is initiated in wet environments with low mineral input where production of organic matter exceeds decay.

  • Peat formation in the context of the development of the

    Mar 01, 2012· Tributary sediment south of the lakes (adjacent to the floodplain) contains little organic material at the surface, but increases with depth. North (upstream) of Yengweni lake, the tributary valley contains peat up to 1.5 m thick, with organic contents up to 30% (generally 10 to 20%).

  • Contribution of peat compaction to relative sealevel rise

    Dec 20, 2011· The model quantifies spatial and temporal trends in peat compaction within fluvialdominated Holocene flood basin sequences of different compositions. 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.

  • An assessment of the societal impacts of - Lowland Peat

    Peat is an organic material that contains very little solid matter and is around 90% water by volume when saturated. Drainage of previously saturated peat soils sets in motion a series of events resulting in reduction in peat volume and lowering of the land surface. Peat subsidence is a function of several

  • How Did We Get All This Coal? Answers in Genesis

    Apr 01, 2013· G. C. Nadon, Magnitude and Timing of Peat-to-coal Compaction, Geology 26.8 (1998): 727730. J. Scheven, The Carboniferous Floating Forestan Extinct Pre-Flood Ecosystem, Creation Ex Nihilo Technical Journal 10.1 (1996): 7081.

  • 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. As the vast majority of peatlands occur in cold temperate regions,

  • Factors controlling the amount and rate of peat compaction

    The dominant factors influencing peat compaction are: (1) organicmatter\ud content, (2) stress imposed on a peat layer, and, to a lesser extent, (3) plant species composition. In an alluvial setting,\ud crevasse splays and natural levees are sites that are most susceptible to high amounts of peat compaction at short timescales\ud (100102 years).

  • Contribution of peat compaction to relative sea-level rise

    Modern and forecasted flooding of deltas is accelerated by subsidence of Holocene deposits. Subsidence caused by tectonics, isostasy, sediment compaction and anthropogenic processes, combined with eustatic sea-level rise, results in drowning and increased flood risk within densely populated deltas. Many deltaic sedimentary successions include substantial amounts of peat, which is highly

  • Contribution of peat compaction to relative sea-level rise

    Modern and forecasted flooding of deltas is accelerated by subsidence of Holocene deposits. Subsidence caused by tectonics, isostasy, sediment compaction and anthropogenic processes, combined with eustatic sea-level rise, results in drowning and increased flood risk within densely populated deltas.

  • Toward a mechanistic understanding of peat collapse and

    Apr 01, 2019· Compaction could occur as a physical response to an increase in overburden on the soil surface, such as the deposition of wrack material or a storm surge (Cahoon 2006, Whelan et al. 2009), or simply the compaction of peat under its own


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