Overview of Regional Coastal Sediment Processes and Controls

2003 ◽  
Author(s):  
Magnus Larson ◽  
Julie D. Rosati ◽  
Nicholas C. Kraus
Keyword(s):  
Coastal Sediment

scholarly journals An Integrated Coastal Sediment Management Plan: The Example of the Tuscany Region (Italy)

2020 ◽  
Vol 8 (1) ◽  
pp. 33 ◽  
Author(s):  
Enzo Pranzini ◽  
Irene Cinelli ◽  
Luigi E. Cipriani ◽  
Giorgio Anfuso
Keyword(s):  
Stability Index ◽  
Management Plan ◽  
Sediment Management ◽  
Coastal Sediment ◽  
National Guidelines ◽  
Management Actions ◽  
Erosion Processes ◽  
Human Effects ◽  
Sufficient Magnitude ◽  
Sound Management

This paper presents the results of a study carried out to support the Region of Tuscany Coastal Sediment Management Plan, with the main aim of establishing the sediment budget considering the time span from 1981–1985 to 2005 for the 56 coastal sectors into which the 215 km-long continental sandy coast of Tuscany (Italy) was divided. The sand stability (according to a stability index) and colour compatibility (according to the CIEL*a*b* colour space with an acceptability range conforming to national guidelines) were determined in order to assess the possibility of using the available sediment in accreting sectors to nourish the beach in eroding areas. Only in two cases—i.e., the updrift of a harbour (at Viareggio) and in a convergence zone (at Marina di Pietrasanta)—are the volumes of sufficient magnitude to support a large nourishment project; however, the mean sand size is too small to guarantee efficient nourishment, even with medium-term stability. In contrast, the colour difference, in most of the cases, was shown to be acceptable. Other small sediment stocks, suitable for colour but not for grain size, can be used for periodic ephemeral nourishment works to support seasonal tourist activities. The limited resources available make it necessary to adopt a plan for their optimal use from a regional perspective. This kind of study is of great interest for the proposal of sound management actions to counteract the increasing erosion processes linked to climate change phenomena and human effects on rivers and coastal systems.

Contamination characteristics of siloxanes in coastal sediment collected from industrialized bays in South Korea

2019 ◽  
Vol 182 ◽  
pp. 109457
Author(s):  
Danbi Lee ◽  
Min-Kyu Park ◽  
In-Seok Lee ◽  
Sung-Deuk Choi
Keyword(s):  
South Korea ◽  
Coastal Sediment

Seasonal variations in the stable carbon isotopic signature of biogenic methane in a coastal sediment

Science ◽  
1986 ◽  
Vol 233 (4770) ◽  
pp. 1300-1303 ◽  
Author(s):  
C. Martens ◽  
N. Blair ◽  
C. Green ◽  
D. Des Marais
Keyword(s):  
Seasonal Variations ◽  
Isotopic Signature ◽  
Coastal Sediment ◽  
Stable Carbon ◽  
Biogenic Methane ◽  
Carbon Isotopic

The Metazoan Meiofauna in Its Biogeochemical Environment: The Case of an Antarctic Coastal Sediment

1998 ◽  
Vol 78 (2) ◽  
pp. 411-434 ◽  
Author(s):  
S. Vanhove ◽  
H.J. Lee ◽  
M. Beghyn ◽  
D. Van Gansbeke ◽  
S. Brockington ◽  
...  
Keyword(s):  
Organic Matter ◽  
Standing Stock ◽  
Austral Summer ◽  
Fine Sand ◽  
Coastal Sediment ◽  
Feeding Guild ◽  
Fresh Organic Matter ◽  
Benthic Environment ◽  
Metazoan Meiofauna ◽  
Deposit Feeding

The metazoan meiobenthos was investigated in an Antarctic coastal sediment (Factory Cove, Signy Island, Antarctica). The fine sands contained much higher abundances compared to major sublittoral sediments worldwide. Classified second after Narrangansett Bay (North Atlantic) they reached numbers of 13 × 106ind m-2. The meiofauna was highly abundant in the surface layers, but densities decreased sharply below 2 cm. Vertical profiles mirrored steep gradients of microbiota, chloropigments and organic matter and were coincident with chemical stratification. Spatial patchiness manifested especially in the surface layer. Nematodes dominated (up to 90%), andAponema, Chromctdorita, Diplolaimella, Daptonema, MicrolaimusandNeochromadoraconstituted almost the entire community. Overall, the nematode fauna showed a strong similarity with fine sand communities elsewhere. The dominant trophic strategies were epistrarum and non-selective deposit feeding, but the applied classification for feeding guild structure of the nematodes of Factory Cove is discussed. High standing stock, low diversity and shallow depth distribution may have occurred because of the high nutritive (chlorophyll exceeded lOOOmgm-2and constituted almost 50% of the organic pool) and reductive character of the benthic environment. These observations must have originated from the substantial input of fresh organic matter from phytoplankton and microphytobenthic production, typical for an Antarctic coastal ecosystem during the austral summer.

Comparing in situ colorimetric DET and DGT techniques with ex situ core slicing and centrifugation for measuring ferrous iron and dissolved sulfide in coastal sediment pore waters

Chemosphere ◽  
2017 ◽  
Vol 188 ◽  
pp. 119-129 ◽  
Author(s):  
Nadeeka Rathnayake Kankanamge ◽  
William W. Bennett ◽  
Peter R. Teasdale ◽  
Jianyin Huang ◽  
David T. Welsh
Keyword(s):  
Ferrous Iron ◽  
Coastal Sediment ◽  
Ex Situ ◽  
Pore Waters ◽  
Dissolved Sulfide

Seawater-groundwater mixing in and fluxes from coastal sediment overlying discrete fresh seepage zones: A modeling study

2017 ◽  
Vol 122 (8) ◽  
pp. 6565-6582 ◽  
Author(s):  
Peter B. Zamora ◽  
M. Bayani Cardenas ◽  
Ronald Lloren ◽  
Fernando P. Siringan
Keyword(s):  
Coastal Sediment ◽  
Groundwater Mixing ◽  
Modeling Study
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