Alluvial fan definition

Alluvial fan means a geomorphologic feature characterized by a cone or fan-shaped deposit of boulders, gravel, and fine sediments that have been eroded from mountain slopes, transported by flood flows, and then deposited on the valley floors, and which is subject to flash flooding, high velocity flows, debris flows, erosion, sediment movement and deposition, and channel migration.

Alluvial fan means a depositional land form consisting of cone-shaped deposit of water-borne, often coarse-sized sediments.

Alluvial fan means a depositional land form consist- ing of cone-shaped deposit of water-borne, often coarse-sized sediments.

Examples of Alluvial fan in a sentence

• Progression to employment or further study There is no further data available on the OfS dataset and there is minimal data collected by the college.

• Alluvial fan and floodplains make up the majority of soils in northern Merced County and are typically sandy.

• Alluvial fan flooding means flooding occurring on the surface of an alluvial fan or similar landform which originates at the apex and is characterized by high-velocity flows; active processes of erosion, sediment transport, and deposition; and unpredictable flow paths.

• Alluvial fan flooding is another type of flooding more common in the mountainous western states.

• Alluvial Fans: Alluvial fan hazards are areas where steep mountain streams flow onto floodplains or into lakes and deposit debris and sediment.

More Definitions of Alluvial fan

Alluvial fan means a geomorphologic feature characterized by a cone or fan shaped deposit of sediments that have been eroded from mountain slopes, transported by flood flows and then deposited in the valley floor and which are subject to flash flooding, high velocity flows, debris flows, erosion, sediment movement and deposition, and channel migration.

Alluvial fan means a low, outspread, relatively flat to gently sloping mass of loose alluvium, shaped like an open fan, deposited by a stream where it issues from a narrow valley, or where a tributary stream issues into the main stream, or wherever a constriction in a valley abruptly ceases or the gradient of the stream suddenly decreases; it is steepest near the mouth of the valley where its apex points upstream, and it slopes gently and convexly outward with gradually decreasing gradient.

Alluvial fan means a desert phenomenon where streams emerge from canyons and deposit sand and rock in a cone-shaped formation fanning out from the canyon mouth.

Alluvial fan means an accumulation of sediment where a steep stream channel flows out onto a valley floor of reduced gradient, often fan-like in shape, subject to further additions of sediment;

Alluvial fan. “Alluvial fan flooding”: means flooding occurring on the surface of an alluvial fan, or similar landform, which originates at the apex and is characterized by: high-velocity flows, active processes of erosion, sediment transport, deposition, and unpredictable flow paths.

Alluvial fan means a fan-shaped deposit of sediment and organic debris formed where a stream flows or has flowed out of a mountainous upland onto a level plain or valley floor because of a sudden change in sediment transport capacity (e.g., significant change in slope or confinement).

Alluvial fan means a fan shaped deposit where a fast-flowing stream flattens, slows, and spreads, typically at the exit of a canyon onto a flatter plan.