Method for preventing and controlling ice lake bursting type flood debris flow

A debris flow and flood technology, applied in the field of prevention and control of glacial lake outburst floods

Active Publication Date: 2020-10-23
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, there is no effective treatment method for the preventi

Method used

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  • Method for preventing and controlling ice lake bursting type flood debris flow
  • Method for preventing and controlling ice lake bursting type flood debris flow
  • Method for preventing and controlling ice lake bursting type flood debris flow

Examples

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Embodiment 1

[0037] A certain watershed on the Qinghai-Tibet Plateau belongs to a tributary on the left side of the upper reaches of Palong Zangbo, with a watershed area of ​​118 km 2 ,, there is a glacial lake at an altitude of 3800m, the channel length in the downstream area of ​​the glacial lake is 10km, and the average aspect ratio is 5%. Through on-site investigation, the storage capacity is about 300×104m when the ice lake is full of water 3 . The glacial lake collapsed in 1988, with a maximum peak flow of 1150m 3 / s. In order to minimize the threat and harm to the railways, highways, water conservancy facilities, residential areas and farmland in the lower reaches of the glacial lake, the method for preventing and controlling glacial lake outburst debris flow of the present invention is adopted, and the specific implementation steps are as follows:

[0038] Step 1. According to the field survey and combined with the actual terrain conditions, the 0-2km downstream of the moraine d...

Embodiment 2

[0054] A certain watershed on the Qinghai-Tibet Plateau is located in Gongbu Jiangda County, with a watershed area of ​​150km 2 , there is a glacial lake at an altitude of 5000m, the channel length in the downstream area of ​​the glacial lake is 20km, and the average aspect ratio is 5%. According to the field survey, the storage capacity is about 600×104m when the ice lake is full of water 3 . The glacial lake collapsed in 1964, with a maximum peak flow of 2800m 3 / s. In order to minimize the threat and harm to the railways, highways, water conservancy facilities, residential areas and farmland in the lower reaches of the glacial lake, the method for preventing and controlling glacial lake outburst debris flow of the present invention is adopted, and the specific implementation steps are as follows:

[0055] (1) According to the terrain conditions, the 0-3km downstream of the moraine dam is defined as the upstream area, the 3-15km is defined as the middle reaches, and the 1...

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Abstract

The invention discloses a method for preventing and controlling ice lake bursting type flood debris flow. Fast peak adjustment is achieved through water-stone separation and water flow dispersion, thescale of the bursting type flood debris flow is controlled, and a method for dissipating energy step by step and controlling provenance starting is utilized for reducing cascade amplification of thescale of the bursting type flood debris flow; a control type silt arrester can be built on the downstream area for flow distributing regulation and control, the bursting type flood debris flow is layered and fast drained and guided into a main river, a prevention and control project can be built in advance on the area with ice lake bursting catastrophic flood debris flow risk to construct a prevention and control system, the flow of the flood debris flow is separated, and the energy is consumed; energy dissipating submerged sills, the silt arrester and other projects are adopted for reducing the energy of the bursting type flood debris flow step by step, rock blocks with huge impact energy on the downstream area are blocked, and debris flow formed by channel shore provenance starting is controlled; and meanwhile formed diluted debris flow or high-volume-weight low-viscidity debris flow can be subjected to water-stone separation, and the diluted debris flow is converted into flood.

Description

technical field [0001] The invention relates to the fields of disaster prevention and mitigation, engineering design and application, in particular to a method for preventing and controlling ice lake outburst flood and rock flow. Background technique [0002] With global warming, glacial lake outbursts frequently occur in high-altitude mountainous areas around the world, often destroying infrastructure and washing away villages and towns, causing serious economic losses and casualties. From the 1930s to the beginning of the 21st century, the number of recorded glacial lake outburst events in the world has shown a clear increase trend, and a total of 33 serious glacial lake outburst floods and rock flow disasters have occurred in my country. For example, in 1954, the Sangwang Co Ice Lake burst in Kangma County, resulting in catastrophic floods and mudslides, which killed about 400 people, affected more than 20,000 people, and caused serious damage to towns such as Gyantse and...

Claims

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Application Information

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IPC IPC(8): E02B1/00E02B3/00E02B7/02E02D5/22
CPCE02B1/00E02B3/00E02B7/02E02D5/22Y02A10/30Y02A10/40
Inventor 陈剑刚陈晓清崔鹏游勇陈华勇栗帅唐金波赵万玉曾璐王喜安
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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