DEBRIS FLOW

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Debris flow
Debris flows are often referred to as mudslides, mudflows, jökulhlaups, or debris avalanches. There is also a debris flow type that has rocky front called 'the head' and a 'tail' like wet concrete. This debris flow has been well reported in the scientific literature. They consist primarily of geological material mixed with water. The composition of this type of flow is mainly soil and other matter, such as trees and rock fragments, that are picked up as the flow moves down a slope or channel. Debris flows may be generated when hillside colluvium or landslide material becomes rapidly saturated with water and flows into a channel. Heavy rainfall, snowmelt, or high levels of ground water flowing through cracked bedrock may trigger a movement of this type. Debris flows and floods may also occur when strong rains on hill or mountain slopes cause extensive erosion and/or what is known as "channel scour". Debris flows can be as thick as wet mud mixed with rock, and can transport very large boulders. Debris flows may also eventually become thinner muddy flood waters as they deposit their heavier components. Geological debris flows tend to move in pulses as friction or other barriers are overcome during the flow. Sometimes earlier pulses or previous debris flows form levees that channel the flow until they are breached. The presence of older levees indicates the recurrence and characteristics of debris flows in a particular area. This can be important information for developing land on what are known as alluvial fans. They are very dangerous and should be avoided at all costs.
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Wikipedia Italiano L'enciclopedia liberaDownload this dictionary
Debris flow
I debris flow o colate detritiche sono un fenomeno che consiste nel trasporto di materiale solido da parte di un fluido, ad esempio una colata di fango causata da una frana che va a finire in un corso d'acqua.I debris flow sono colate con elevata concentrazione di materiale detritico, che si muovono verso valle con velocità che possono raggiungere ed in alcuni casi superare i 10 m/s. Il materiale trasportato ha granulometria molto variabile ed un singolo fenomeno si manifesta frequentemente con ondate successive (pulsazioni) dovute a temporanee ostruzioni del canale di trasporto. Le colate detritiche sono fenomeni diffusi nella maggior parte delle fasce climatiche, dalle regioni desertiche a quelle alpine e rivestono una notevole importanza sia per la loro influenza sull’evoluzione morfologica del bacini idrografici nei quali avvengono, sia per il rischio potenziale che determinano in aree montuose, a causa della loro elevata capacità distruttiva. In tali aree, aumenti improvvisi di disponibilità idrica, dovuti comunemente a piogge intense o allo scioglimento della neve, possono provocare, con lo scorrimento dell’acqua lungo i pendii, la mobilitazione di ingenti quantità di detrito che vengono incorporate in un debris flow.
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专业字典Download this dictionary
debris flow
debris-free completion fluid 无固相完井液

English Spanish dictionary by Jaime AguirreDownload this dictionary
debris flow
flujo de escombros - flujo de lodo de gran densidad cargado de material heterogéneo como rocas, troncos de árboles, etc.

Victors - Dictionar Tehnic (Englez-Roman)Download this dictionary
debris flow
(hidr) torent
  

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