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Related Concept Videos

Energy and Power of a Wave00:58

Energy and Power of a Wave

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The total energy associated with a wavelength is the sum of the potential energy and the kinetic energy. The average rate of energy transfer associated with a wave is called its power, which is total energy divided by the time it takes to transfer the energy. For a sinusoidal wave, energy and power are proportional to the square of both the amplitude and the angular frequency.
Waves can also be concentrated or spread out, as characterized by the intensity of the wave. Intensity is directly...
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Effect of Sea Water on Concrete01:22

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Concrete exposed to seawater can undergo degradation like the dissolution of ettringite and gypsum, increasing the material's porosity and decreasing its strength. In contrast, the crystallization of salts within the concrete's pores can cause expansion, particularly above the waterline where evaporation occurs. Nonetheless, this expansion only happens when seawater, enabled by the concrete's permeability, manages to infiltrate the structure.
Concrete in areas between tide marks,...
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Kinetic and Potential Energy of a Wave01:10

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All forms of waves carry energy; this is directly visualized in nature. For instance, the waves of earthquakes are so intense that they can shake huge concrete buildings, causing them to fall. Loud sounds can damage nerve cells in the inner ear, causing permanent hearing loss. The waves of the oceans can erode beaches. 
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Wave Parameters01:10

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The simplest mechanical waves are associated with simple harmonic motion and repeat themselves for several cycles. These simple harmonic waves can be modeled using a combination of sine and cosine functions. Consider a simplified surface water wave that moves across the water's surface. Unlike complex ocean waves, in surface water waves, water moves vertically, oscillating up and down, whereas the disturbance of the wave moves horizontally through the medium. If a seagull is floating on the...
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Propagation of Waves01:07

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When a wave propagates from one medium to another, part of it may get reflected in the first medium, and part of it may get transmitted to the second medium. In such a case, the interface of the two mediums can be considered as a boundary that is neither fixed nor free.
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Responses to Salt Stress02:02

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Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.
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Updated: Aug 9, 2025

Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing
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Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing

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Reevaluating the wave power-salt marsh retreat relationship.

L J Houttuijn Bloemendaal1, D M FitzGerald2, Z J Hughes2

  • 1Department of Earth and Environment, Boston University, Boston, Massachusetts, USA. Lbloem@bu.edu.

Scientific Reports
|February 22, 2023
PubMed
Summary
This summary is machine-generated.

Salt marsh erosion is complex and not always linearly related to wave power. Site-specific data and robust statistical analysis are crucial for accurately predicting marsh resilience to climate change.

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Area of Science:

  • Coastal Ecology
  • Geomorphology
  • Environmental Science

Background:

  • Salt marshes face significant threats from rising sea levels and human activities, leading to ecosystem loss primarily through edge erosion.
  • Understanding marsh erosion is vital for predicting ecosystem resilience, with previous studies linking erosion rates to wave power.

Purpose of the Study:

  • To investigate the relationship between wave power and salt marsh erosion globally, incorporating new data from the Great Marsh, Massachusetts.
  • To assess the impact of data distribution and site-specific factors on the predictability of marsh erosion.

Main Methods:

  • Analysis of global datasets reporting linear relationships between wave power and marsh erosion.
  • Inclusion of new data from the Great Marsh, Massachusetts, USA.
  • Statistical analysis accounting for non-normal data distributions and site-specific variables.

Main Results:

  • Most marsh wave power and erosion data are not normally distributed, altering previously observed linear relationships when properly analyzed.
  • Specific wind directions significantly impact Great Marsh erosion due to fetch and wind speed.
  • Factors beyond direct wave attack, such as tidal channel erosion, also contribute measurably to retreat rates.

Conclusions:

  • The relationship between wave power and marsh erosion is highly site-specific and requires robust, localized statistical calibration.
  • Ignoring statistical assumptions and site-specificity leads to unreliable predictions of marsh resilience to climate change and extreme events.