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Example of land loss in coastal Louisiana between 1932 and 2011; detail of Port Fourchon area. Coastal erosion in Louisiana is the process of steady depletion of wetlands along the state's coastline in marshes, swamps, and barrier islands, particularly affecting the alluvial basin surrounding the mouth of the Mississippi River.
Cut bank – Outside bank of a water channel, which is continually undergoing erosion; Crevasse splay – Sediment deposited on a floodplain by a stream which breaks its levees; Drainage basin – Land area where water converges to a common outlet (watershed) Esker – Long, winding ridge of stratified sand and gravel associated with former ...
A levee failure during the Great Mississippi Flood of 1927. A breach in a dike during the North Sea flood of 1953.. A levee breach or levee failure (also known as dyke breach or dyke failure) is a situation where a levee (or dyke) fails or is intentionally breached, causing the previously contained water to flood the land behind the levee.
Internal erosion is the formation of voids within a soil caused by the removal of material by seepage. [1] It is the second most common cause of failure in levees and one of the leading causes of failures in earth dams, [2] responsible for about half of embankment dam failures.
The side of a levee in Sacramento, California. A levee (/ ˈ l ɛ v i / or / ˈ l ɛ v eɪ /), [a] [1] dike (American English), dyke (British English; see spelling differences), embankment, floodbank, or stop bank is an elevated ridge, natural or artificial, alongside the banks of a river, often intended to protect against flooding of the area adjoining the river.
The Universal Soil Loss Equation (USLE) is a widely used mathematical model that describes soil erosion processes. [1]Erosion models play critical roles in soil and water resource conservation and nonpoint source pollution assessments, including: sediment load assessment and inventory, conservation planning and design for sediment control, and for the advancement of scientific understanding.
Lake bed downcutting is the erosion of cohesive material such as clay or glacial till from a shoreline by wave action. When the sand cover is stripped away and the cohesive layer is exposed, cohesive material is lost to the water column. Unlike sand, cohesive material cannot be replenished by natural events such as bluff erosion. This can ...
The process is often a result of a sudden fall in sea level or the rise of land. The disturbance enables a rise in the river's gravitational potential energy change per unit distance, increasing its riverbed erosion rate. The erosion occurs as a result of the river adjusting to its new base level. [1]