scholarly journals PROCESS AND MORPHOLOGY CHARACTERISTICS OF TWO BARRIER BEACHES IN THE MAGDALEN ISLANDS, GULF OF ST. LAWRENCE, CANADA

1976 ◽  
Vol 1 (15) ◽  
pp. 114
Author(s):  
E.H. Owens
Keyword(s):  
Wave Energy ◽  
East Coast ◽  
Energy Levels ◽  
Morphological Characteristics ◽  
Dispersal Patterns ◽  
Barrier Beach ◽  
Sediment Dispersal ◽  
Sediment Redistribution ◽  
Barrier Beaches ◽  
Magdalen Islands

Detailed field investigations of barrier beach morphology and processes at adjacent sites in the Magdalen Islands, Gulf of St. Lawrence, show that the two beaches are in distinctly different morphodynamic environments. The differences are expressed in terms of wave energy levels, sediment dispersal patterns, and nearshore, littoral, and dune geomorphology. The exposed west-facing coast has a steeper offshore gradient, is a zone of sediment bypassing, and has a complex sequence of three nearshore bars. Wave energy levels are lower on the sheltered east coast, and this is a zone of sediment redistribution and deposition with a single, linear nearshore bar. The different morphological characteristics of the two barriers are attributed to the spatial variation in energy levels and to the differences in offshore gradients on the two coasts. Computed wave energy values, derived from data monitored during two study periods (August and November, 1974), indicate that the mean wave energy levels were greater on the west coast as compared to the east coast by factors of 2.25 in summer and 2.95 in winter. This is due primarily to the dominance of winds out of the westerly quadrant throughout the year. 1975

DETRITAL ZIRCON PROVENANCE OF THE DENVER BASIN: EVOLVING SEDIMENT DISPERSAL PATTERNS DURING THE LARAMIDE OROGENY

2016 ◽  
Author(s):  
Viridis M. Miranda Berrocales ◽  
◽  
Glenn R. Sharman ◽  
Jacob A. Covault ◽  
Daniel F. Stockli
Keyword(s):  
Detrital Zircon ◽  
Denver Basin ◽  
Dispersal Patterns ◽  
Sediment Dispersal ◽  
Laramide Orogeny

Nearshore wave energy resource characterization along the East Coast of the United States

2021 ◽  
Vol 172 ◽  
pp. 1212-1224
Author(s):  
Seongho Ahn ◽  
Vincent S. Neary ◽  
Mohammad Nabi Allahdadi ◽  
Ruoying He
Keyword(s):  
United States ◽  
Wave Energy ◽  
East Coast ◽  
Energy Resource ◽  
The United States

scholarly journals Sea Wave Energy. A Review of the Current Technologies and Perspectives

Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6604
Author(s):  
Domenico Curto ◽  
Vincenzo Franzitta ◽  
Andrea Guercio
Keyword(s):  
Wave Energy ◽  
Power Plants ◽  
New Technologies ◽  
Morphological Characteristics ◽  
Electrical Energy ◽  
Wave Energy Converter ◽  
Tidal Range ◽  
Ocean Current ◽  
Energy Converter ◽  
Ocean Thermal Energy

The proposal of new technologies capable of producing electrical energy from renewable sources has driven research into seas and oceans. Research finds this field very promising in the future of renewable energies, especially in areas where there are specific climatic and morphological characteristics to exploit large amounts of energy from the sea. In general, this kind of energy is referred to as six energy resources: waves, tidal range, tidal current, ocean current, ocean thermal energy conversion, and saline gradient. This review has the aim to list several wave-energy converter power plants and to analyze their years of operation. In this way, a focus is created to understand how many wave-energy converter plants work on average and whether it is indeed an established technology.

THE PERSISTENCE AND EFFECTS OF NON-WATER-BASED DRILLING FLUIDS ON AUSTRALIA'S NORTH WEST SHELF: PROGRESS FINDINGS FROM THREE SEABED SURVEYS

1999 ◽  
Vol 39 (1) ◽  
pp. 647 ◽  
Author(s):  
G.A. Oliver ◽  
S.J. Fisher
Keyword(s):  
Biological Effects ◽  
Drilling Fluids ◽  
Well Drilling ◽  
North West ◽  
Sediment Dispersal ◽  
Discharge Point ◽  
The North ◽  
Sediment Redistribution ◽  
Water Based ◽  
One Year

The effects and persistence of non-water-based drilling fluids discharged into the marine environment were investigated at three locations on Western Australia's North West Shelf (NWS), namely the North Rankin 4A' (NRA) drilling platform, the Wanaea–6 production well and the Lynx–la exploration well. For the multiple-well drilling operation at NRA, acute biological effects at the completion of drilling were restricted to within 400 m in the direction of the prevailing current. High total petroleum hydrocarbon (TPH) concentrations within the NRA cuttings pile persisted between 1991 and 1993. Away from the cuttings pile itself, a consistent downward trend in TPH concentrations was evident, indicating an approximate half-life of one year for surface sediments. Three years after the completion of drilling at Wanaea–6, biological effects appeared to be limited to within 100 m of the cuttings discharge point, with background concentrations of TPH and trace metals occurring near 1,200 m in the direction of the prevailing current. Sediment hydrocarbon concentrations greater than 1 mg/kg were found to be restricted to within 200 m of the cuttings discharge point. Dramatic reductions in TPH and barium concentrations occurred in the 12-month period between the completion of drilling and the follow- up survey at Lynx–la. The reductions are attributed to sediment dispersal mechanisms which appear to play a major role in reducing sediment TPH and trace metal concentrations in mid-shelf water depths (70–80 m) on the NWS. The installation and presence of subsea production facilities may result in sediment redistribution and changed dispersal mechanisms, complicating the interpretation of the presence of contaminants within sediments.

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