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

Jan 01, 2009· Read "Effects of peat compaction on delta evolution: A review on processes, responses, measuring and modeling, Earth-Science Reviews" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

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Decomposition of Organic Soils in the Sacramento-San ...

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.

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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 ... coastal lowland peatlands, specifically the impact of drainage on peat subsidence and flood risk. The landscape morphology of the Rajang Delta peatland study area in Sarawak

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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,

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

Peat compaction and formation are key processes in delta evolution, especially in distal parts with relatively high accommodation rates where thick peat layers are formed in the flood basins. The way and magnitude by which peat compaction and formation influence delta architecture strongly depend on temporal and spatial scale.

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

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ICFS 11 - Calgary 2017 - Programme Theme IV

Another example is that both living and dead vegetation, the latter in the form of subsurface peat layers, enhance sediment trapping on the floodplain: (1) living vegetation at the surface affects surface water flows and traps sediment during floods, (2) compaction of subsurface peat layers in the floodplain revitalizes accommodation space for ...

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Response of a Fluvial Depositional System to Unequal Com ...

sheets of floodplain deposits. Typically, the geometry of the ar-chitectural elements is dominated by syndepositional rotation of originally horizontal strata. This is interpreted as caused by localized differential subsidence induced by unequal compac-tion of underlying peat. With increasing compaction of peat …

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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 world’s tropical peat …

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Sanneke van Asselen | Utrecht University - Academia.edu

Peat compaction likely plays an important role in the evolution of alluvial plains, for example by providing extra accommodation space, which affects temporal and spatial fluvial sedimentation patterns. It has also been suggested that differential peat compaction affects floodplain gradients, and hence may affect the occurrence of avulsion.

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Peat formation in the context of the development of the ...

Mar 01, 2012· However, in systems where the toe of the drainage line is gradually rising owing to clastic sedimentation on the adjacent floodplain, the estimated rate of peat accumulation must be more rapid as peat accumulation integrates compaction rate, feedback of peat formation on the elevation of the water table, and a gradually rising water level from ...

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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 high, differential peat compaction may lead to gradient advantages. This may affect spatial sedimentation patterns on a floodplain.

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Middle to late-Holocene decreased fluvial aggradation and ...

This study investigated the influence of sea-level and climate changes on the decreased fluvial aggradation and subsequent widespread peat initiation in the middle to late-Holocene in the Ishikari lowland, which is a coastal floodplain formed in response to the postglacial sea-level change.

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test 3 chap 7 Flashcards | Quizlet

Start studying test 3 chap 7. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

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

An overview is given regarding: 1) the compaction process, 2) presumed and potential effects of peat compaction on delta evolution, 3) field methods to quantify peat compaction and 4) numerical models to calculate the amount and rate of peat compaction. Peat compaction and formation influence channel belt elevation, channel belt geometry and ...

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Peat - Wikipedia

Peat (/ p iː t /), also 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 is the most efficient carbon sink on the planet, because peatland plants capture CO 2 naturally released from the peat, maintaining an equilibrium.

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Flood modelling and compaction studies for the Upper Ure ...

Flood modelling and compaction studies for the Upper Ure Project UUCP1/2015 Jihui Gao, Mike Kirkby, Richard Grayson and Joseph Holden [email protected], School of Geography, University of Leeds March 2015 Report to be cited as: Gao, J., Kirkby, M.J., Grayson, R. and Holden, J. (2015) Flood modelling and compaction studies for the Upper Ure. Final ...

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Peat compaction in river floodplains - Academia.edu

View Academics in Peat compaction in river floodplains on Academia.edu.

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

Apr 28, 2013· The model quantifies spatial and temporal trends in peat compaction within fluvial‐dominated 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.

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

studies are inadequate for quantifying peat compaction across deltas. We present a numerical peat compaction model calibrated with an extensive field dataset. The model quantifies spatial and temporal trends in peat compaction within fluvial-dominated Holocene flood basin sequences of different compositions. Subsidence due to peat compaction

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Indiana Soils:Evaluation and Conservation Online Manual

The black color is due to high organic matter content. Many soils on flood plains do not show this much stratification. Large areas of alluvial soils are on the flood plains along the major rivers of Soil Region 3. Smaller areas of these alluvial soils are also along streams in many other soil regions.

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(PDF) 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

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Factors Controlling Peat Compaction in Alluvial ...

Sheet-like splay deposits initially compact underlying peat uniformly, whereas differential compaction commonly occurs beneath natural levees due to lateral variations in sediment thickness. Subsidence due to peat compaction creates additional accommodation space and hence locally enhances floodplain sedimentation rates.

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Depositional record of an avulsive fluvial system ...

Two main, mutually linked, processes controlled the evolution of the studied fluvial system: (i) syndepositional compaction of the underlying peat and (ii) avulsions of the channels away from the original floodplain, resulting in formation of a new floodplain.

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

The model quantifies spatial and temporal trends in peat compaction within fluvial-dominated 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.

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Geologic Setting of the Sacramento-San Joaquin Delta

Geologic Setting of the Sacramento-San Joaquin Delta . The Sacramento-San Joaquin ... The great flood of 1862 brought record seasonal rainfall, ... Peat Compaction tied to mineral content, depth of burial, and thickness Rough correlations between

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Chapter 8: From sediment to sedimentary rock Flashcards ...

The laying down of sediment. Occurs wherever the carrying capacity (energy) of the transporting agent decreases sufficiently for sediment to settle out. example: stream channels and flood planes, lakeshores and lake bottoms, the margins of glaciers, where wind is intermittently strong like beaches and deserts.

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ABSTRACT: Depositional Geometries of an Avulsive Fluvial ...

Although the channel migration was not limited by peat growth as is some modern rivers, the extremely low gradient of the floodplain and differential compaction of peat beneath active floodplain belts were the main controls on channel migration and avulsion, at …

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How rewilding reduces flood risk

flood management can and does help reduce flood risk. Beneficial measures include increasing upland flood storage areas, re-vegetating bare peat on moors and creating leaky woody dams either in waterways or in wet woodlands alongside main channels. The report states: “The measured local effects of a variety of these techniques

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

Existing studies are inadequate for quantifying peat compaction across deltas. We present a numerical peat compaction model calibrated with an extensive field dataset. The model quantifies spatial and temporal trends in peat compaction within fluvial-dominated Holocene flood basin sequences of different compositions.

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