SU935554A1 - Method for controlling glacial mud streams - Google Patents

Description

The invention relates to hydraulic engineering and can be used to deal with mudflows during the breakthrough of glacial lakes and intraglacial reaches during the subsequent passage of the breakthrough water flow through the mudflow centers.

A known method of dealing with mudflows, including the construction in front of the protected object of a mesh barrier [1]. ¹

The disadvantage of this method is that the barrier delays only large fractions of the mudflow, small pass through it.

There is also a method of dealing with mudflows, including glacial type, including the construction of a dam. The dam is built in front of the protected object [2].

The disadvantage of this method is the high cost of dam construction, since it is necessary to create a 'tank. selechranilisha by the volume of the estimated mudflow, which, due to the avalanche-like mechanism of mudflow formation, is 10–20 or more times the volume of the water flood that caused it. In addition, after passing the mudflow, it is necessary to restore the capacity of the storage facility by building up a dam or cleaning the capacity of the storage facility.

The purpose of the invention is the reduction in cost of work and the reduction of material costs.

This goal is achieved by the fact that the dam is built above the mudflow site, the floods from the breakthrough of glacial lakes and intraglacial reservoirs are accumulated in the reservoir, and the reservoir is discharged with a flow rate less than the sewerage.

In FIG. 1 shows a glacial seleniferous basin, a longitudinal section; in FIG. 2 - dam, cross section; in FIG. 3 - hydrograph of overshoot by the dam of a water flood during the breakthrough of glacial lakes.

To combat mudflows, a dam 1 is built with outlets 2 between glacial lakes 3, as well as intraglacial reservoirs 4 and a mudflow center 5. Dam 1 must create a tank that allows for the complete accumulation of breakthrough water floods 6 (Fig. 3), and water outlet 2 must provide automatic gradual discharge of the accumulated volume of water with a maximum flow rate of 7 (Fig. 3), less than the debris flow rate 8 (Fig. 3) )

When a glacier lake 3 or an internal glacial reservoir 4 breaks through, water accumulates in a tank in front of dam 1. The reservoir is discharged by a flow rate 7, which is less than the mudflow-forming flow rate 8, i.e., such a flow rate that does not form an avalanche-like mudflow.

The proposed implementation of the method of controlling mudflows of a glacial type makes it possible to reduce the cost of work and reduce material costs.

Claims (2)

The invention relates to hydrotechnology and can be used to control mudflows during the breakthrough of glacier lakes and intraglacial: during the subsequent passage of the breakthrough water flow through the centers of mudflow formation. There is a known method of dealing with mudflows, including the construction of a netted barrier 13 in front of the object to be protected. A disadvantage of the known method is that the barrier delays only large fractions of the mudflow, small ones passing through it. There is also a known method of dealing with mudflows, including of the glial type, including the construction of the dam. The dam is built in turn with the projected object C2. The disadvantage of this method is the high cost of dam construction, since it is necessary to create a reservoir capacity by the estimated mudflow, which, due to the avalanche-like mechanism of settlement, is 10–2O and more times the volume; the water flood that caused it. In addition, after the passage of villages, it is necessary to restore the capacity of the selected building by increasing the dam or cleaning the reservoir tank. The purpose of the invention is to reduce the cost of work and reduce material costs. This goal is achieved by the fact that the dam is built above the center of separation, accumulate in the reservoir P 1 from the spill of glacial lakes and intraglacial reservoirs, and discharge the reservoir with a flow rate lower than that which forms the reservoir. FIG. 1 shows a glacial with a pontoon pool, a longitudinal section; in fig. 2 is a plbtin, cross section} in FIG. 3 - hydrograph of water flooding with dam at breakthrough of glacial lakes. 3935 In order to combat mudflows, dam 1 was built with water outlets 2 between glacial lakes 3, as well as aquatic glades 4 and hearth 5 of village formation. Dam 1 should create a capacity that allows for the complete accumulation of a gap of amphibious water floods 6 (Fig. 3), and water supply 2 should provide automatic gradual drawdown of the accumulated water volume with maximum flow rates 7 (Fig. 3), smaller than the flow-forming expense 8 (Fig. 3). When a glacial lake 3 or an internal water reservoir 4 breaks through, water accumulates in the tank in front of the dam 1. The reservoir draws off with flow 7, less mud-forming flow 8, i.e. such flow that does not form an avalanche-like mudflow. of the formal type allows to reduce the cost of work and reduce material costs. The invention of the method of combating mudflows of the public type, including the construction of a dam, characterized in that, in order to reduce the cost of work and reduce material costs, the reservoir builds up a center of settlement, accumulates in the reservoir floods from the breakthrough of glacial lakes and inland waters. drawdown of the reservoir with the flow rate, which changes the selenium. Sources of information taken into account in the examination 1. USSR author's certificate number 165123, cl. Е О2 В 3 / О2, 1961 2. USSR author's certificate number 586228, cl. Е О2 В 3/02, 1976 (prototype).  pacxo j