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Intrinsic and extrinsic controls on ...

Mattheus, Christopher Robin.

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Intrinsic and extrinsic controls on sedimentation and the morphology of late Pleistocene to modern estuaries in North Carolina.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Intrinsic and extrinsic controls on sedimentation and the morphology of late Pleistocene to modern estuaries in North Carolina./
Author:	Mattheus, Christopher Robin.
Description:	138 p.
Notes:	Source: Dissertation Abstracts International, Volume: 71-01, Section: B, page: 0175.
Contained By:	Dissertation Abstracts International71-01B.
Subject:	Geomorphology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3387746
ISBN:	9781109540079

Intrinsic and extrinsic controls on sedimentation and the morphology of late Pleistocene to modern estuaries in North Carolina.
Mattheus, Christopher Robin.

Intrinsic and extrinsic controls on sedimentation and the morphology of late Pleistocene to modern estuaries in North Carolina. - 138 p.

Source: Dissertation Abstracts International, Volume: 71-01, Section: B, page: 0175.

Thesis (Ph.D.)--The University of North Carolina at Chapel Hill, 2009.

Coastal morphologies along passive continental margins are the product of complex interactions between erosional and depositional processes that respond to upstream and downstream forcing mechanisms over varying spatial and temporal scales. Upstream controls regulate river-discharge conditions whereby downstream controls govern the distribution of coastal accommodation space and basin hydrodynamics. Understanding how these processes interact over varying timeframes is important for developing accurate models of past and future coastal evolution.

ISBN: 9781109540079Subjects--Topical Terms:

542703
Geomorphology.

Intrinsic and extrinsic controls on sedimentation and the morphology of late Pleistocene to modern estuaries in North Carolina.
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020 $a 9781109540079
035 $a (UMI)AAI3387746
035 $a AAI3387746
040 $a UMI $c UMI
100 1 $a Mattheus, Christopher Robin. $3 1683752
245 1 0 $a Intrinsic and extrinsic controls on sedimentation and the morphology of late Pleistocene to modern estuaries in North Carolina.
300 $a 138 p.
500 $a Source: Dissertation Abstracts International, Volume: 71-01, Section: B, page: 0175.
500 $a Adviser: Antonio B. Rodriguez.
502 $a Thesis (Ph.D.)--The University of North Carolina at Chapel Hill, 2009.
520 $a Coastal morphologies along passive continental margins are the product of complex interactions between erosional and depositional processes that respond to upstream and downstream forcing mechanisms over varying spatial and temporal scales. Upstream controls regulate river-discharge conditions whereby downstream controls govern the distribution of coastal accommodation space and basin hydrodynamics. Understanding how these processes interact over varying timeframes is important for developing accurate models of past and future coastal evolution.
520 $a Specifically, three aspects of late Quaternary coastal evolution are investigated, including: (1) controls on late Pleistocene valley incision at the highstand shoreline, (2) connectivity between a coastal-plain watershed and its estuarine depositional basin, and (3) influences of coastal setting and respective land-use modifications on fringe-marsh shoreline evolution.
520 $a Research into controls on incised-valley size and shape shows systems at highstand passive-margin shorelines are equilibrated to the size of their respective drainage basins, which reflect long-term discharge. These findings negate widely accepted models that attribute shelf gradient as being the dominant control on valley morphology and offer tools for investigating the data-limited ancient rock record.
520 $a The correlation between valley dimension and drainage-basin size degrades for small coastal fluvial systems as slope processes override discharge as the primary mechanism of valley incision. These differences have an effect on resulting highstand river morphology. Large valleys have high accommodation in their low-gradient extensive floodplains and small watersheds on the lower coastal plain have higher fluvial gradients and much less storage space along route. Contrary to large estuaries that are well buffered from changes in sediment load, estuaries associated with small lower coastal plain rivers are directly connected with their watersheds and are more sensitive to climate and land-use changes.
520 $a Since riverine landscapes of the lower coastal plain are highly connected to estuaries, land-use changes in the basin quickly facilitate mineral accretion and marsh progradation in upper bay environments. In contrast, marshes distally located to these systems receive little of this sediment and are less likely to maintain a favorable intertidal elevation and stable shoreline position with respect to rising sea level and human impacts.
590 $a School code: 0153.
650 4 $a Geomorphology. $3 542703
650 4 $a Marine Geology. $3 1674685
690 $a 0484
690 $a 0556
710 2 $a The University of North Carolina at Chapel Hill. $b Marine Sciences. $3 1670010
773 0 $t Dissertation Abstracts International $g 71-01B.
790 1 0 $a Rodriguez, Antonio B., $e advisor
790 1 0 $a Anderson, John B. $e committee member
790 1 0 $a McKee, Brent A. $e committee member
790 1 0 $a Piehler, Michael F. $e committee member
790 1 0 $a Ries, Justin B. $e committee member
790 $a 0153
791 $a Ph.D.
792 $a 2009
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3387746