Gully bed water level early-warning method suitable for different types of disasters caused by rainstorms and torrential flood

Abstract

The invention provides a gully bed water level early-warning method suitable for different types of disasters caused by rainstorms and torrential flood. The gully bed water level early-warning method comprises the following steps that (1) the section of a gully bed for preventing and treating rainstorm and torrential flood disasters is selected, and an early-warning water level is determined; (2) it is assumed that the gully bed is submerged by the rainstorms and the torrential flood, the gully bed bottom pressure stress when the gully bed is submerged by the rainstorms and the torrential flood with different depths is calculated, and a gully bed bottom pressure stress and water level change relationship graph is drawn; and (3) during the rainstorms and the torrential flood, the change of the gully bed bottom pressure stress and the gully bed section water level is monitored in real time and is recorded as mark points (Fp<s>, Z<s>), the mark points are marked in the relationship graph, the types of the current rainstorms and the current torrential flood are judged according to the positions wherein the mark points are located, the early-warning range of the gully bed bottom pressure stress of the different types of the rainstorms and the torrential flood is determined through the early-warning water level according to the relationship graph, and when the real-timely monitored gully bed pressure stress reaches the early-warning range of the gully bed bottom pressure stress of the corresponding type of the rainstorms and the torrential flood, real-time early-warning of different types of rainstorms and the torrential flood is issued.

Description

technical field [0001] The invention belongs to the field of early warning of torrential rain and mountain torrent disasters in mountainous watersheds, and relates to a method for early warning of gully bed water levels applicable to disasters caused by different types of torrential rain and torrents. Background technique [0002] Mountain torrent disasters refer to flood disasters caused by rainfall in hilly areas and mud-rock flows and landslides induced by mountain torrents, which cause losses to the national economy and people's lives and property. National mountain torrent disaster prevention and control planning technical outline, 2003). In recent decades, flash flood disasters have become a major disaster among various natural disasters in the world, causing huge casualties and social and economic losses, which have attracted great attention from governments and world organizations (Sun Dongya et al., 2012). In order to avoid disasters caused by flash floods, many de...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for early warning of gully bed water level suitable for disasters caused by different types of rainstorms and torrents, so as to solve the problem of false alarms caused by the inability to distinguish the types of rainstorms and torrents in the existing rainstorm and torrent warning methods In order to improve the accuracy of the early warning of disasters caused by heavy rain and mountain torrents, and provide more scientific and reliable guidance for the prevention and control of mountain torrent disasters

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