Glacier lake outburst pre-warning method

A technology of early warning monitoring and early warning level, applied in the direction of alarms, instruments, etc., can solve the problems of no consideration, non-negligible impact of ice lake outburst, low prediction accuracy, etc., and achieve the effect of strong applicability

Inactive Publication Date: 2016-04-20
CHENGDU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

However, this prediction method does not take into account the topographical factors that lead to glacial lake collapse, resulting in low prediction accuracy. Glacial lake collapse caused by ice avalanc...

Method used

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Embodiment Construction

[0040] The technical solutions of the present invention will be further described below in combination with preferred embodiments.

[0041] figure 2 It is a schematic diagram of the technical process. The method of the present invention is used to carry out early warning of the collapse of Zaricuo Ice Lake in Dingjie County, Tibet.

[0042] Such as figure 1 As shown, the following basic data of Zaricuo Ice Lake are measured through Googleearth:

[0043] Zaricuo Ice Lake: α=9°, θ=305°.

[0044] The above basic parameter data α and θ are substituted into formula (2), and Zaricuo topographic factor S=0.39 is calculated and determined.

[0045] When the temperature of the Zaricuo Ice Lake is high, the real-time temperature data of the Ice Lake can be obtained through the temperature of the weather station. Repeatedly set the positive accumulated temperature T before the temperature of the day 0 And the temperature of the day 7 days before (including the day) and T 7 Substi...

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Abstract

The invention belongs to the field of debris flow prevention and control engineering and hydraulic engineering and relates to a glacier lake outburst pre-warning method. A potential outburst glacier lake serves as a pre-warning monitoring region, a glacier tongue slope alpha and a glacier slope direction theta of the potential outburst glacier lake are measured and determined, meteorological data are examined to determine the average positive accumulated temperature Ty2 of glacier lake outburst points in the last two years and the many-year average positive accumulated temperature Ty of glacier lake outburst points, the positive accumulated temperature T0 before certain time and the average temperature sum T7 of seven days before the time are monitored in real time, and with a pre-warning monitoring region glacier lake outburst critical value Cr as a monitored value, glacier lake outburst pre-warning levels are divided according to the monitored value. According to the glacier lake outburst pre-warning method, the internal mechanism of the glacier lake outburst happening degree is researched by researching temperature factors and terrain factors, and a glacier lake pre-warning and forecasting model is established; influences of the temperature factors and the terrain factors on a glacier lake outburst are comprehensively considered, and the glacier lake outburst is forecast quantitatively.

Description

technical field [0001] The invention belongs to the fields of debris flow prevention and control engineering and water conservancy engineering, and relates to a method for early warning of ice lake outburst. Background technique [0002] Glacial lakes include glacier-eroded lakes, glacier-surface lakes, subglacial lakes, moraine-blocked lakes, and glacier-blocked lakes. Since the mouth of the ice-eroded lake is a rock ridge, the flowing water can only be cut gradually and slowly, so it is difficult to burst suddenly. Although glacier lakes and subglacial lakes are more common in glacial areas, because of their small size and small water storage capacity, even if a rupture occurs, the flow of water will be small. Therefore, in the cases of outburst floods of various glacial lakes, most of them are outbursts of moraine-blocked lakes and glacier-blocked lakes. When discussing glacial lake outbursts, we should focus on them. Generally speaking, the formation of moraine-blocked...

Claims

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Application Information

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IPC IPC(8): G08B21/10
CPCG08B21/10
Inventor 余斌刘秧
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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