Debris flow

Debris flow

Debris flow means heavy rains, abundant snow, or other natural disasters cause landslides with a large number of sediment and rocks in the torrent which often happen in mountainous or other deep valleys, steep terrain of the region.

The whole process of debris flows generally only a few hours and short only a few minutes. The harm of debris flow is serious.The difference between it and flood is debris flow contains a sufficient number of mud stone and other solid debris. These material volume content at least account for 15%, up to about 80%. Therefore, debris flow is more destructive than the flood.

photo1photo2 Main harm of the landslide is wash out the cities and towns, factories, mines, villages, make human and animal get hurt, damage to premises and other engineering facilities, destroy crops, forests and farmland. In addition, the debris flow also can make river channel blocked. Not only block the shipping, but also may cause floods. There are many factories affecting the intensity of debris flow, such as debris flow capacity, flow velocity, the main influence on the debris flow hazard degree is the rate of

flow. In addition, a variety of human activities has contributed on many aspects factors; promote the formation of debris flow.

photo3

The debris flow’s happen has a rule, it has periodicity and seasonality. The occurrence of debris flow is affected by heavy rains, floods, and storms, floods always appear periodically. Therefore, the occurrence of debris flow and the development also has certain periodicity, and the cycle of the heavy rain, flooding is similar to debris flow’s cycle. Mudslides outbreaks in China mainly caused by the continuous rain, heavy rain, especially heavy rain concentrated. Therefore, the time regulation of mud-rock flow occurred is consistent with concentrated rainfall time approximately. In other words, debris flow has obvious seasonal regulation. Generally occur in the rainy summer and fall. Mudslide happens’regulation is different time because concentrated rainfall time is different.

When heavy rains, floods, the cycle of activity are coincide with seasonal, debris flow often have a climax.

Reference list:

1. Photo 1 and 2:https://www.wendangku.net/doc/728608368.html,/view/7135.htm#3

2.Photo3:https://www.wendangku.net/doc/728608368.html,/i?ct=503316480&z=&tn=baiduimagedetail&word=%E6%B3%A5%E7%9F%B3%E6%B5%81 &ie=utf-8&in=17341&cl=2&lm=-1&st=&pn=10&rn=1&di=264570717450&ln=2000&fr=ala1&&fmq=1370420512699_R&ic=&s=&se =&sme=0&tab=&width=&height=&face=&is=&istype=&ist=&jit=&objurl=http%3A%2F%https://www.wendangku.net/doc/728608368.html,%2Fnews%2F2010_08 %2F09%2Fnews%2F1281316121466_000.jpg#pn10&-1&di264570717450&objURLhttp%3A%2F%https://www.wendangku.net/doc/728608368.html,%2Fnews%2F 2010_08%2F09%2Fnews%2F1281316121466_000.jpg&fromURLippr_z2C%24qAzdH3FAzdH3Foi_z%26e3B3twpx_z%26e3Bv54Azd H3FgjofAzdH3Fda88-an-8cAzdH3F9m00da9_89_z%26e3Bip4&W800&H533&T8356&S98&TPjpg