Implications of delta retreat on wave propagation and longshore sediment transport - Guadalfeo case study (southern Spain)

2016 ◽  
Vol 382 ◽  
pp. 1-16 ◽  
Author(s):  
Rafael J. Bergillos ◽  
Alejandro López-Ruiz ◽  
Miguel Ortega-Sánchez ◽  
Gerd Masselink ◽  
Miguel A. Losada
Keyword(s):  
Wave Propagation ◽  
Sediment Transport ◽  
Southern Spain ◽  
Longshore Sediment Transport

scholarly journals APPLICATION OF A SEMI-EMPIRICAL LONGSHORE TRANSPORT FORMULATION

2012 ◽  
Vol 1 (33) ◽  
pp. 22
Author(s):  
Giuseppe Barbaro ◽  
Giuseppe Roberto Tomasicchio ◽  
Giovanni Malara ◽  
Felice D'Alessandro
Keyword(s):  
Sediment Transport ◽  
Transport Rate ◽  
Sediment Transport Rate ◽  
Longshore Sediment Transport ◽  
Longshore Transport ◽  
Semi Empirical

The present paper deals with the determination of longshore sediment transport rate. Specifically, case study of Saline Joniche (Reggio Calabria, Italy, is discussed. This case is of interest because, in this location, an artificial basin was built in the 70’s. After few years, port entrance experienced total obstruction by sand. Actually, the area is abandoned and several projects have been proposed for revitalising port activities. This paper discusses a method for estimating the longshore sediment transport rate at Saline Joniche and complements previous methodology.

Seismic characterization and origin of clinoforms in lacustrine depositional environments: a case study from the Cretaceous of the South Atlantic

2020 ◽  
pp. SP509-2019-148
Author(s):  
Andrew J. Barnett ◽  
Lucy Fu ◽  
Tolu Rapasi ◽  
Cinzia Scotellaro ◽  
Jaydip Guha ◽  
...  
Keyword(s):  
Sediment Transport ◽  
Lower Energy ◽  
Gamma Ray ◽  
Depositional Environments ◽  
Longshore Sediment Transport ◽  
Seismic Characterization ◽  
Bona Fide ◽  
Flooding Events ◽  
Gamma Ray Log

AbstractThe lacustrine Itapema Formation in the Santos Basin locally comprises 102 m thick clinoforms identified seismically and corroborated by several well penetrations. Individual clinoforms, as proven by well penetrations, are composed of 102 m thick successions of basinward-dipping molluscan grainstones and rudstones. Manual dip picking of borehole images shows upward-increasing dips consistent with seismic geometries and a predominance of longshore sediment transport. Clinoforms are bound at their top and base by strata with significantly lower dips recognizable on both seismic and borehole images. Elevated gamma-ray log responses together with sidewall core samples indicate that these intervals correspond to more argillaceous facies which are interpreted as lake flooding events. While the existence of bona fide clinoforms is demonstrated by a range of subsurface data, their precise origin remains enigmatic. The majority of the bivalve genera that make up the grain-supported carbonates appear to be infaunal or semi-infaunal. As such the clinoforms represent large bars produced through the re-working of bivalves from lower-energy depositional environments by shore-parallel currents.

Longshore sediment transport in the surf zone based on different formulae: a case study along the central west coast of India

2017 ◽  
Vol 21 (1) ◽  
pp. 1-13 ◽  
Author(s):  
V. Sanil Kumar ◽  
P. R. Shanas ◽  
G. Udhaba Dora ◽  
Johnson Glejin ◽  
Sajiv Philip
Keyword(s):  
Sediment Transport ◽  
West Coast ◽  
Surf Zone ◽  
West Coast Of India ◽  
Longshore Sediment Transport

Sea wave propagation from offshore to Maputo's coast. Application to longshore sediment transport assessment

2014 ◽  
Vol 69 (12) ◽  
pp. 2438-2445
Author(s):  
Cristina N. A. Viola ◽  
Manel Grifoll ◽  
Jaime Palalane ◽  
Tiago C. A. Oliveira
Keyword(s):  
Wave Propagation ◽  
Sediment Transport ◽  
Coastal Region ◽  
Wave Theory ◽  
Wave Climate ◽  
Linear Wave ◽  
Engineering Research ◽  
Longshore Sediment Transport ◽  
Mesh Resolution ◽  
Offshore Wave

This study aims to characterize the wave climate near the coastal region of Maputo (Mozambique), and to provide a first assessment of the sediment transport load in this area. A time-series of 13 years' worth of offshore wave data, obtained from reanalysis products, was propagated to the coast. Wave propagation was performed using Linear Wave theory and the numerical model, Simulating WAves Nearshore (SWAN). Propagations with SWAN were carried out considering different scenarios in order to evaluate the influence of parameters such as wind, tidal level, frequency spectrum and numerical mesh resolution on wave characteristics along the coast. The prevalent waves propagated came from between east and southwest directions. Results from linear propagation were used to estimate the potential longshore sediment transport. The Coastal Engineering Research Center formula was applied for a stretch of beach in the Machangulo Peninsula. A net potential rate of longitudinal sediment transport (of the order of 105 m3/year, along an extension of the coast of 21 km) was directed northwards, and was consistent with the frequent wave directions.

Determination and control of longshore sediment transport: A case study

2007 ◽  
Vol 34 (2) ◽  
pp. 219-233 ◽  
Author(s):  
H. Anıl Ari ◽  
Yalçın Yüksel ◽  
Esin Özkan Çevik ◽  
Işıkhan Güler ◽  
Ahmet Cevdet Yalçiner ◽  
...  
Keyword(s):  
Sediment Transport ◽  
Longshore Sediment Transport ◽  
And Control

MODELLING LONG-TERM SHORELINE EVOLUTION: FIGUEIRA DA FOZ BEACH, PORTUGAL

2017 ◽  
pp. 17
Author(s):  
Carla Pereira ◽  
Carlos Coelho ◽  
Paulo A. Silva
Keyword(s):  
Sediment Transport ◽  
Numerical Models ◽  
Shoreline Position ◽  
Shoreline Evolution ◽  
Longshore Sediment Transport ◽  
Time Period ◽  
Accretion Rates ◽  
Time Periods

This work applies two different shoreline evolution numerical models (LTC and GENESIS) in two different time periods (1980 2010 and 2010-2014) to compare respectively the calibration and validation performance of the models. The models were applied to evaluate long-term shoreline position and longshore sediments transport evolution, considering as a case study a sandy beach stretch located updrift of the Figueira da Foz harbor jetty, on the Northwest Portuguese coast. Due to the jetty extension, this stretch exhibits a clear accretion trend during the analyzed time periods. For this region, the longshore sediment transport rate estimated by several authors varies between 200 and 1500x103m3/year. According to the modelling results, it was observed that both models reproduce reasonably well the shoreline evolution between 1980 and 2010. In average, the LTC model reproduces a 2010 shoreline position nearest the observed and GENESIS presents better approximation in the Northern part of the beach and also near the South (downdrift) border (just close to the Northern jetty of the harbor). The modeled shoreline average accretion rates for the considered stretch is quite similar and close to the values referred in the bibliography, which indicates that the beach presents 500 meters of maximum accretion width updrift the jetty (about 16.6m/year). In what concerns to the longshore sediment transport it was observed that numerical models generally indicate lower values than the bibliography, being GENESIS results higher and closer to the observed than the LTC. These results are common in the numerical modelling of shoreline evolution, showing that is difficult to simultaneously represent both the shoreline position and sediment transport volumes. After calibration, LTC validation was evaluated for the time period between 2010 and 2014 to allow confidence in the extrapolation of results to the future. Estimated deposition rates of about 350x103m3/year were obtained at the harbor entrance.

Sediment transport under dry weather conditions in a small sewer system

1998 ◽  
Vol 37 (1) ◽  
pp. 155-162
Author(s):  
Flemming Schlütter ◽  
Kjeld Schaarup-Jensen
Keyword(s):  
Sediment Transport ◽  
Field Data ◽  
Field Measurements ◽  
Weather Conditions ◽  
Sewer System ◽  
Transport Models ◽  
Sewer Systems ◽  
Combined Sewer ◽  
Initial Results

Increased knowledge of the processes which govern the transport of solids in sewers is necessary in order to develop more reliable and applicable sediment transport models for sewer systems. Proper validation of these are essential. For that purpose thorough field measurements are imperative. This paper renders initial results obtained in an ongoing case study of a Danish combined sewer system in Frejlev, a small town southwest of Aalborg, Denmark. Field data are presented concerning estimation of the sediment transport during dry weather. Finally, considerations on how to approach numerical modelling is made based on numerical simulations using MOUSE TRAP (DHI 1993).

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