- Sektör: Government
- Number of terms: 5261
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The United States Army Corps of Engineers is a federal agency with a mission to provide vital public engineering services in peace and war to strengthen the nation's security, energize the economy, and reduce risks from disasters. It is also a major U.S. Army organization employing some 38,000 ...
For a sediment sample, defined as the ratio of the volume of the voids to the volume of the solids, Q = Vv/Vs. Typical values of Q for natural sands range from 0.5 to 0.8, for cohesive soils from 0.7 to 1.1.
Industry:Engineering
(1) Sometimes used as a short form for littoral drift. (2) The speed at which a current runs. (3) Floating material deposited on a beach (driftwood). (4) A deposit of a continental ice sheet; e.g., a drumlin.
Industry:Engineering
Construction of a dam by dumping the materials from one or both banks, thus constricting the channel progressively laterally until the dam is closed. This method is also known as end dumping and point tipping
Industry:Engineering
A logarithmic transformation of the Wentworth grade scale for size classifications of sediment grains based on the negative logarithm to the base 2 of the particle diameter: = -log2d.
Industry:Engineering
A fine grained, plastic, sediment with a typical grain size less than 0.004 mm. Possesses electromagnetic properties which bind the grains together to give a bulk strength or cohesion.
Industry:Engineering
The gradual, slow compression of a cohesive soil due to weight acting on it, which occurs as water is driven out of the voids in the soil. Consolidation only occurs in clays or other soils of low permeability.
Industry:Engineering
Refers to an environment that contain little or no dissolved oxygen and hence little or no benthic marine life. These conditions arise in some basins or fjords where physical circulation of seawater is limited.
Industry:Engineering
A circular movement of water formed on the side of a main current. Eddies may be created at points where the main stream passes projecting obstructions or where two adjacent currents flow counter to each other.
Industry:Engineering
The frequency band (nominally 0.001 - 0.02 Hz) occupied by shear instabilities of the longshore current. This band falls both below and in the lower part of the Infragravity band occupied by Infragravity waves.
Industry:Engineering
The waves that form when wind blows for a sufficient period of time across the open ocean. The waves of a fully developed sea have the maximum height possible for a given wind speed, fetch and duration of wind.
Industry:Engineering
