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River Delta Subsidence Measured with Interferometric Synthetic Aperture Radar (InSAR).

Record Type:	Electronic resources : Monograph/item
Title/Author:	River Delta Subsidence Measured with Interferometric Synthetic Aperture Radar (InSAR)./
Author:	Higgins, Stephanie.
Description:	1 online resource (200 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 76-01, Section: B.
Contained By:	Dissertations Abstracts International76-01B.
Subject:	Geology. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3621339click for full text (PQDT)
ISBN:	9781303923784

River Delta Subsidence Measured with Interferometric Synthetic Aperture Radar (InSAR).
Higgins, Stephanie.

River Delta Subsidence Measured with Interferometric Synthetic Aperture Radar (InSAR). - 1 online resource (200 pages)

Source: Dissertations Abstracts International, Volume: 76-01, Section: B.

Thesis (Ph.D.)--University of Colorado at Boulder, 2014.

Includes bibliographical references

This thesis addresses the need for high-resolution subsidence maps of major world river deltas. Driven by a combination of rising water, sediment compaction, and reduced sediment supply due to damming and flood control, many deltas are sinking relative to sea level. A lack of data constraining rates and patterns of subsidence has made it difficult to determine the relative contributions of each factor in any given delta, however, or to assess whether the primary drivers of land subsidence are natural or anthropogenic. In recent years, Interferometric Synthetic Aperture Radar (InSAR) has emerged as a satellite-based technique that can map ground deformation with mm-scale accuracy over thousands of square kilometers. These maps could provide critical insight into the drivers of subsidence in deltas, but InSAR is not typically applied to non-urban delta areas due to the difficulties of performing the technique in wet, vegetated settings. This thesis addresses those difficulties and achieves high-resolution measurements of ground deformation in rural deltaic areas. Chapter 1 introduces the processes that drive relative sea level rise in river deltas and investigates open questions in delta subsidence research. Chapter 2 assesses the performance of InSAR in delta settings and reviews interferogram generation in the context of delta analysis, presenting delta-specific processing details and guiding interpretation in these challenging areas. Chapter 3 applies Differential (D-) InSAR to the coast of the Yellow River Delta in China. Results show that subsidence rates are as high as 250 mm/y due to groundwater extraction at aquaculture facilities, a rate that exceeds local and global average sea level rise by nearly two orders of magnitude and suggests a significant hazard for Asian megadeltas. Chapter 4 applies interferometric stacking and Small Baseline Subset (SBAS)-InSAR to the Ganges-Brahmaputra Delta, Bangladesh. Results show that stratigraphy controls subsidence in this delta, with concentrated local deformation surrounding Dhaka caused by compaction of the youngest strata. Chapter 5 summarizes and concludes this thesis.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9781303923784Subjects--Topical Terms:

516570
Geology.
Subjects--Index Terms:

DeltasIndex Terms--Genre/Form:

542853
Electronic books.

River Delta Subsidence Measured with Interferometric Synthetic Aperture Radar (InSAR).
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245 1 0 $a River Delta Subsidence Measured with Interferometric Synthetic Aperture Radar (InSAR).
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500 $a Source: Dissertations Abstracts International, Volume: 76-01, Section: B.
500 $a Publisher info.: Dissertation/Thesis.
500 $a Advisor: Syvitski, James P. M.
502 $a Thesis (Ph.D.)--University of Colorado at Boulder, 2014.
504 $a Includes bibliographical references
520 $a This thesis addresses the need for high-resolution subsidence maps of major world river deltas. Driven by a combination of rising water, sediment compaction, and reduced sediment supply due to damming and flood control, many deltas are sinking relative to sea level. A lack of data constraining rates and patterns of subsidence has made it difficult to determine the relative contributions of each factor in any given delta, however, or to assess whether the primary drivers of land subsidence are natural or anthropogenic. In recent years, Interferometric Synthetic Aperture Radar (InSAR) has emerged as a satellite-based technique that can map ground deformation with mm-scale accuracy over thousands of square kilometers. These maps could provide critical insight into the drivers of subsidence in deltas, but InSAR is not typically applied to non-urban delta areas due to the difficulties of performing the technique in wet, vegetated settings. This thesis addresses those difficulties and achieves high-resolution measurements of ground deformation in rural deltaic areas. Chapter 1 introduces the processes that drive relative sea level rise in river deltas and investigates open questions in delta subsidence research. Chapter 2 assesses the performance of InSAR in delta settings and reviews interferogram generation in the context of delta analysis, presenting delta-specific processing details and guiding interpretation in these challenging areas. Chapter 3 applies Differential (D-) InSAR to the coast of the Yellow River Delta in China. Results show that subsidence rates are as high as 250 mm/y due to groundwater extraction at aquaculture facilities, a rate that exceeds local and global average sea level rise by nearly two orders of magnitude and suggests a significant hazard for Asian megadeltas. Chapter 4 applies interferometric stacking and Small Baseline Subset (SBAS)-InSAR to the Ganges-Brahmaputra Delta, Bangladesh. Results show that stratigraphy controls subsidence in this delta, with concentrated local deformation surrounding Dhaka caused by compaction of the youngest strata. Chapter 5 summarizes and concludes this thesis.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
538 $a Mode of access: World Wide Web
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650 4 $a Remote sensing. $3 535394
653 $a Deltas
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653 $a Sea level rise
653 $a Subsidence
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710 2 $a University of Colorado at Boulder. $b Geology. $3 1019510
773 0 $t Dissertations Abstracts International $g 76-01B.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3621339 $z click for full text (PQDT)