Abstract

In the channels of mountain and foothill streams, as a result of landslides (collapses) of coastal slopes, litter soil dams are often formed, blocking the watercourse channel. On the upper side of them, water masses accumulate, the over flow of which through the dam can lead to the destruction of the latter and the emergence of a catastrophic breakthrough mudfl ow that threatens the safety of life of the lower territories. In these conditions, it is important to quickly assess the extent of the risk, taking into account the existing hydrogeomorphological characteristics of the channel reservoir. The paper obtains calculated dependencies for the analytical finding of the necessary characteristics of the (full, partially fi lled) flood reservoir, as well as the values of the reserve volume and time of fi lling the reservoir, based on remotely determined parameters of individual points located on the dam and the adjacent channel of the watercourse.

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