東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Sediment transport dynamics in Delaw...

McSweeney, Jacqueline M.

FindBook

Google Book

Amazon

博客來

Sediment transport dynamics in Delaware estuary.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Sediment transport dynamics in Delaware estuary./
作者:	McSweeney, Jacqueline M.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2017,
面頁冊數:	197 p.
附註:	Source: Dissertation Abstracts International, Volume: 78-08(E), Section: B.
Contained By:	Dissertation Abstracts International78-08B(E).
標題:	Biological oceanography. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10584690
ISBN:	9781369634587

Sediment transport dynamics in Delaware estuary.
McSweeney, Jacqueline M.

Sediment transport dynamics in Delaware estuary. - Ann Arbor : ProQuest Dissertations & Theses, 2017 - 197 p.

Source: Dissertation Abstracts International, Volume: 78-08(E), Section: B.

Thesis (Ph.D.)--Rutgers The State University of New Jersey, School of Graduate Studies, 2017.

This item is not available from ProQuest Dissertations & Theses.

Estuaries are dynamically complex systems that connect riverine sources to the coastal ocean. The circulation within an estuary is fundamentally 3-dimensional, and lateral processes contribute significantly to material transport. Estuaries are known to trap sediment through convergent processes, and the estuarine turbidity maximum (ETM) zone, an area of elevated suspended sediment concentrations, is a particularly important region of sediment trapping, resuspension, and deposition. Though it is understood that sediment transport processes vary spatially and temporally within the ETM, the details of this variability and their impact on transport pathways and trapping efficiency are unknown. This dissertation characterizes the spatiotemporal variability of sediment processes in the Delaware Estuary, focusing on the contribution of lateral processes, pathways of sediment export, and sediment impacts on primary productivity.

ISBN: 9781369634587Subjects--Topical Terms:

2122748
Biological oceanography.

Sediment transport dynamics in Delaware estuary.
LDR:04454nmm a2200349 4500 001 2201126
005 20190405084458.5
008 201008s2017 ||||||||||||||||| ||eng d
020 $a 9781369634587
035 $a (MiAaPQ)AAI10584690
035 $a (MiAaPQ)rutgersnb:7759
035 $a AAI10584690
040 $a MiAaPQ $c MiAaPQ
100 1 $a McSweeney, Jacqueline M. $3 3427852
245 1 0 $a Sediment transport dynamics in Delaware estuary.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2017
300 $a 197 p.
500 $a Source: Dissertation Abstracts International, Volume: 78-08(E), Section: B.
500 $a Adviser: Robert J. Chant.
502 $a Thesis (Ph.D.)--Rutgers The State University of New Jersey, School of Graduate Studies, 2017.
506 $a This item is not available from ProQuest Dissertations & Theses.
520 $a Estuaries are dynamically complex systems that connect riverine sources to the coastal ocean. The circulation within an estuary is fundamentally 3-dimensional, and lateral processes contribute significantly to material transport. Estuaries are known to trap sediment through convergent processes, and the estuarine turbidity maximum (ETM) zone, an area of elevated suspended sediment concentrations, is a particularly important region of sediment trapping, resuspension, and deposition. Though it is understood that sediment transport processes vary spatially and temporally within the ETM, the details of this variability and their impact on transport pathways and trapping efficiency are unknown. This dissertation characterizes the spatiotemporal variability of sediment processes in the Delaware Estuary, focusing on the contribution of lateral processes, pathways of sediment export, and sediment impacts on primary productivity.
520 $a Sediment and velocity observations were acquired during 6 months in 2011 from seven moorings deployed across-channel in the known vicinity of the ETM. The data included upward-looking ADCPS calibrated to in situ sediment concentrations from which high-resolution sediment flux estimates were derived to evaluate the relative contributions of tidal and non-tidal processes and how they varied laterally. Tidal pumping contributed to roughly 30% of the along-channel sediment transport, facilitating export on the flank on the Delaware (DE) side but mostly import in the channel. In contrast, tidal pumping contributed very little to across-channel transport. The subtidal (or residual) sediment transport varied both spatially and temporally, driving export at all locations during high river discharge but export on the flank and import in the channel during lower river flows. Residual fluxes dominated the across-channel transport, and an area of divergence on the DE flank was identified that could facilitate sediment delivery to edging marshes. These observations highlight that sediment transport processes are spatially variable and directly impact sediment trapping in an estuary.
520 $a A coupled hydrodynamic and sediment transport Regional Ocean Modeling System (ROMS) model was used to evaluate the spatial variability of residual sediment fluxes over spring-neap, seasonal, and annual timescales. Since sediment transport observations are sparse and spatially limited, the model can help clarify the 3-dimensional structure of the ETM and how lateral variability may differ along-channel. This analysis provided a more comprehensive picture of how sediment may be reworked in the ETM or exported either out of the estuary or to the fringing marshes.
520 $a The Delaware Estuary is turbid, and primary production within the ETM can become light limited due to high sediment concentrations. In 2010 and 2011, measurements of suspended sediment, light levels, oxygen and nitrate concentrations, and chlorophyll were collected along the main axis of the estuary in March, June, September, and December. These observations were used along with an idealized ROMS model to evaluate stratification and other processes that control sediment resuspension, which in turn impact light availability and primary productivity. This study emphasized that estuarine sediment dynamics have importance implications beyond material transport.
590 $a School code: 0190.
650 4 $a Biological oceanography. $3 2122748
650 4 $a Physical oceanography. $3 3168433
690 $a 0416
690 $a 0415
710 2 $a Rutgers The State University of New Jersey, School of Graduate Studies. $b Graduate School - New Brunswick. $3 3352163
773 0 $t Dissertation Abstracts International $g 78-08B(E).
790 $a 0190
791 $a Ph.D.
792 $a 2017
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10584690