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عنوان فارسی مقاله:
مدل پارامتری برای تعادل پروفایل ساحل مسدود: اجرای دو بعدی
عنوان انگلیسی مقاله:
A parametric model for barred equilibrium beach profiles: Two-dimensional implementation
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Parametric forms for equilibrium beaches have been studied and used for many years as plausible proxies for bathymetry for cases where the true bathymetry is unknown or is only poorly known, or for long-term applications such as beach response to sea level rise where it is assumed that only the gross characteristics of a beach such as increasing depth and upward concavity are important (see Ozkan-Haller and Brundidge, 2007 for a recent review). One of the most common models is the ubiquitous h = Ax2/3 form, first introduced by Bruun (1954) then popularized by Dean (1991), where x and h are distance from shore and depth and A is a dimensional calibration constant. However, other forms soon followed. Inman et al. (1993) suggested a version that joined two Dean-like profiles at the breakpoint, Larson and Kraus (1989) suggested a form that superimposed a planar shallow water component with an offshore Dean form, Ozkan-Haller and Brundidge (2007) introduced a modification to further limit the influence of the planar component to shallow water, and Bodge (1992) and Komar and McDougal (1994) suggested exponential rather than power law forms as a preferred solution that exhibited finite slope at the shoreline and a desired concave up profile. All of these forms flattened to a horizontal surface offshore, hopefully well seaward of a zone in which they would be applied. While all of these forms capture some characteristics of beaches, none can represent the near-ubiquitous presence of sand bars in the nearshore. Since wave dissipation is focused over bars, hydrodynamic predictions such as nearshore circulation or peak wave height made using beach profiles that omit these features will have limited value. Ruessink et al. (2003; hereafter RWHKvE03) investigated the possibility of deriving a parametric form for sand bar perturbations to a simple background profile by analyzing extensive data sets from six beaches around the world and developing a general equation (described in the section below) that represented sand bars in terms of a sinusoidal function with spatially varying amplitude and wavelength. This bar function, hbar, is superimposed on an underlying background bathymetry, h0, that might be derived from long-term average
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کلمات کلیدی:
A Parametric Model for Barred Equilibrium Beach Profiles - DTIC OAI oai.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=html&identifier... by RA Holman - 2014 - Cited by 8 - Related articles May 10, 2014 - Accession Number : ADA609495. Title : A Parametric Model for Barred Equilibrium Beach Profiles. Descriptive Note : Journal article. Corporate ... [PDF]EQUILIBRIUM TERRACED AND BARRED BEACHES Mark D ... https://icce-ojs-tamu.tdl.org/icce/index.php/icce/article/download/5798/5466 by MD Orzech - 1998 - Cited by 2 - Related articles predicts the equilibrium profile better than the sheet flow model for both tests. ... development and final shape of terraced and barred equilibrium beach profiles. Typical equilibrium beach profile models and their significances from ... link.springer.com/article/10.1007/s13344-016-0041-7 by J Yu - 2016 - Related articles This study introduces three typical models on equilibrium beach profile, and discusses the application limitations of these models. Then this study examines the ... A Beach Profile Model for a Barred Coast: Case Study from ... - jstor https://www.jstor.org/stable/4298850 by P Wang - 1998 - Cited by 50 - Related articles important parts of a nearshore equilibrium system due to their dynamic response ... ADDITIONAL INDEX WORDS: Barred beach profile, beach profile modeling, ... "A Beach Profile Model for a Barred Coast – Case Study from Sand ... scholarcommons.usf.edu › ... › Geology › Faculty Publications › 173 by P Wang - 1998 - Cited by 50 - Related articles The bar and trough features are important parts of a nearshore equilibrium ... barred beach profile, beach profile modeling, cross-shore sediment transport, ... [PDF]B. Dubarbier, B. Castelle, V. Marieu, H. Michallet & F. Grasso www.coastaldynamics2013.fr/pdf_files/047_Dubarbier_Benjamin.pdf by B Dubarbier - 2013 - Cited by 4 - Related articles Key words: Beach profile, numerical model, physical modelling, equilibrium .... The first experiment is the barred-beach quasi-equilibrium profile extensively ... Coastal Processes with Engineering Applications https://books.google.com/books?isbn=0521602750 Robert G. Dean, Robert A. Dalrymple - 2004 - Science An equilibrium model for strongly barred shorelines was proposed by Wang and ... other attempts to find the equilibrium beach profiles; for example, models for ...
