Sel - a torrent, in which there is a large concentration of rock fragments, rock and mineral particles.Their amount may exceed half the volume of all water present therein.The disaster - sel - suddenly appears in the basins of small mountain rivers.Most often the main cause of its occurrence is a dramatic melting of snow or intense rainfalls.
General
consistency stream acts an intermediate between a solid and a liquid mass.Sel - a phenomenon that is relatively short-term nature and lasts no more than three hours.Mostly occurs in small streams, the length of which does not exceed 30 kilometers.
Features
Speed of such flows in the range of 2 to 6 meters per second.This is due to their destructive effect.Sel - is the thread that creates a deeper riverbed on its way.They usually contain little or streams are completely dry.The components that make up the stream are collected in the plains before the mountains.To sit characterized by movement in the form of water of its frontal part of the shaft.The most common number, which consists of alternately successive shafts.When coming off a rural, almost always the consequences are severe changes in the shape bed.
Causes
Sel - a violent natural phenomenon.The flow may occur due to the rapid melting of glaciers, snow-capped array of seasonal or prolonged and intense heavy rainfall.Also can serve the cause of getting a huge number of objects in ryhlooblomochnyh track.Deforestation in mountainous areas is a major factor in the emergence of rapid flux.In preventing the occurrence sat trees play an important role, as they retain the roots of the topsoil.In dry logs with a large bias in the basins of small mountain rivers destructive flows are rare.Seli can be classified.There are landslide, landslide, erosion and breakthrough types of origin of the phenomenon.
Outbreaks
potential sites for the occurrence of flow are pool or channel section, if they have accumulated a large amount of material ryhlooblomochnogo.At risk are also areas where the conditions for its accumulation, and certain areas watered.These pockets have their own classification.There are potholes, incisions and locations dispersed streams of education.Area dispersed mudflow considered steep bare areas, which has accumulated a large number of severely damaged rocks.This center has an extensive and dense network of fissures.Directly in the process of forming them mikroseley education and weathering products.Then, all these elements are combined into a single channel.
Debris Flow pothole
This phenomenon is a linear education that cuts through forested, rocky slopes and sodded.Usually, they are composed of a thin crust of weathering.These ruts are characterized by a small depth and length.The angle of the bottom of it more than 15 degrees.
crashing
This phenomenon is a powerful education that have developed an array of ancient moraine.Mainly it included in the total of the sharp bends of the slope.In addition, these incisions often occur on such types of relief, such as: landslide, volcanic, landslide and accumulative.Size mud cuttings greatly exceeds potholes.Also vary their longitudinal profiles.In cuttings they have a smooth shape than the potholes.The maximum depth of the first may exceed 100 meters.The catchment area of this type can be up to 60 kilometers, while the volume of soil SUBMITTED one thread - 6 million cubic meters.
Remedies
Sel (photo stream is presented in the article) has a huge devastating effect.To combat them, the construction of special facilities and measures are being taken to secure the vegetation and soil cover.The choice of protection is based on determining the boundaries of a mud pool.Ideally, preventive measures should be at the very beginning of origin to stop the flow and weaken its effect.Standing timber in the territory of dangerous areas considered the most radical method.This technique is able to divide the total flow into separate streams, reducing the total weight of the water and adjust the flow.The danger zone is necessary to increase the stability of the slopes, as well as through embankments and upland ditches to intercept and divert sat.The most effective use of the dam in the beds.They represent structures of concrete and stone, whose task is the delay of the solids flow.Dams are designed to guide the rural less prone to rupture shore.It is also an effective way to protect the construction of the guide comes dams.They are able to direct the flow in the right direction and significantly weaken its effect.
