What is sel?
The unusual word "sel" came to us from the Arabic language, where it means "rapid flow". What stream are we talking about and what is mudflow? About it right now.
We already know that mudflow is a kind of flow. More precisely, it is a mass flow with a high concentration of mineral particles, fragments of rocks, stones. This mass is a cross between a liquid and a solid mass. These streams arise suddenly, usually in the area of dry meadows and basins of small mountain rivers.
Something like this can be described as muddled. Now let's talk about the characteristics of this phenomenon.
- The phenomenon is considered short-term, lasts an average of 1-3 hours.
- Mudflows (or mudflows) have an average speed of 2-4 meters per second. Flows and speeds of 4-6 m / s are achieved, acquiring an increasingly destructive character.
- Passing mudflows leave behind a dry channel. It happens that small streams appear in the channels.
- The frontal part of mudflows is characterized by the shape of a shaft of water and sediment.
Causes of mudflows
- Heavy rainfall.
- Melting glaciers or snow cover.
- Deforestation in the highlands. Tree roots restrain the soil of the mountainous terrain, thereby preventing the occurrence of mudflows.
Boarded: places of origin
Potential mudflow focus is the mudflow basins or mudflows with a large amount of detrital material and conditions of its accumulation, which turn into active mudflows as a result of the occurrence of certain watering conditions (rainfall, glaciers, etc.).
There are three types of mudflows:
- The mudflow incision is a morphological formation that originated in the thickness of the ancient moraine deposits.
- Mudflow pothole is a morphological formation of a linear character (typical of rocky, forested slopes).
- The centers of the dispersed mudslide formation are a dense, extensive network of furrows of heavily destroyed rocks. The formation of small mudflows due to accumulations of weathering products of rocks leads to the formation of a single mudflow bed.
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