Wave Breaking and Wave Driven Flow in the Nearshore

نویسنده

  • Thomas C. Lippmann
چکیده

Understanding wave dissipation in the nearshore is approached through modeling of field observations obtained across a variety of beach profiles and under a wide range of wave conditions. Wave breaking data are obtained remotely from video recordings of the surf zone, and image processing techniques subsequently used to detect and quantify the position and time of wave breaking occurrences over spatial and temporal scales ranging 10-1000 meters and 10-10000 seconds. The observed spatial distribution of ensemble-averaged wave breaking patterns are used in combination with collaborative measurements of in situ wave pressure and velocity to improve wave dissipation estimates, and subsequently applied to parametric models of incident wave energy transformation, mean current forcing, and sediment transport within the surf zone. This work is being conducted collaboratively Dr.’s E. B. Thornton and T. P. Stanton of the Naval Postgraduate School, and Dr.’s A. E. Hay and A. J. Bowen of Dalhousie University.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Hydrodynamic Modelling of Coral Reefs:Ningaloo Reef-Western Australia

As with all coral reef systems, the ecology of Ningaloo Reef is closely linked to water circulation which transport and disperse key material such as nutrients and larvae. Circulation on coral reefs may be driven by a number of forcing mechanisms including waves, tides, wind, and buoyancy effects. Surface waves interacting with reefs have long been known to dominate the currents on many coral r...

متن کامل

Wave Breaking and Rip Current Circulation

This paper examines the effect of current-induced breaking on the modeling of wave breaking dissipation near rip currents. Simulations using a set of existing wave transformation models are compared to existing laboratory measurements made on a bar/channel topography in the presence of both strong and weak rip currents. The model/data comparisons demonstrate that existing models can effectively...

متن کامل

The Response of the Wave-driven Circulation at Ningaloo Reef, Western Australia, to a Rise in Mean Sea Level

Ningaloo Reef extends some 280 km along the western coast of Australia, and consists of a barrier reef ~1-6 km offshore with occasional gaps, backed by a shallow lagoon. The reef morphology thus has some similarities to submerged breakwaters, which largely attenuate wave energy by wave breaking over the reef flat. This wave breaking generates radiation stress gradients that produce setup and wa...

متن کامل

Application of Artificial Neural Network and Fuzzy Inference System in Prediction of Breaking Wave Characteristics

Wave height as well as water depth at the breaking point are two basic parameters which are necessary for studying coastal processes. In this study, the application of soft computing-based methods such as artificial neural network (ANN), fuzzy inference system (FIS), adaptive neuro fuzzy inference system (ANFIS) and semi-empirical models for prediction of these parameters are investigated. Th...

متن کامل

An unsteady wave driver for narrowbanded waves: modeling nearshore circulation driven by wave groups

In this paper, we derive an unsteady refraction–diffraction model for narrowbanded water waves for use in computing coupled wave–current motion in the nearshore. The end result is a variable coefficient, nonlinear Schrödinger-type wave driver (describing the envelope of narrow-banded incident waves) coupled to forced nonlinear shallow water equations (describing steady or unsteady mean flows dr...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2014