SU1060754A1 - Method of drying land in permafrost areas - Google Patents

Abstract

The method of drying land in the zone of multi-year frost, including a passage of drainage channels and drainage of water through them, is characterized in that, in order to increase the efficiency of drainage and accelerate the melting of ice, the drainage channels are opened across the entire surface of the drainage area through the openings, and the openings can be drained through the openings. and after the removal of the autumn surplus and spring thawed waters, the canals are locked for a period of positive average daily air temperatures. whereupon the channels are opened and the water formed by melting ice over many years is discharged.

Description

ABOUT

about o - j

cd 1 The invention relates to land reclamation, in particular to the drainage of land in the permafrost zone. There is a method of drainage of land, including a passage of drainage channels and drainage of water through it. A disadvantage of this method is that after 2-3 years of drainage work on areas with icy soils in the permafrost zone after putting the land into operation for 10-15 Over the years, there has been an overmoistening of the soil in the second half of summer and the formation of numerous tsrmokartovy depressions with dredging of crops. After 10–15 years, the drained areas are out of order and need major repairs. The purpose of the invention is to increase the drainage efficiency and accelerate the melting of multi-year ice. The goal is achieved by the fact that according to the method of draining the zeel. Drainage channels are torn off over the entire surface of the drained area at intervals equal to their width, and more abstracted from the autumn surplus and spring thawed water, the channels are closed for a period of positive average daily air temperatures, after which the channels are opened and the water formed due to melting of multiyear ice is discharged. The method is as follows. The area in the permafrost zone is chosen (m (60-65 cm peat horizon). The seasonal thawing depth on the site after drying in a known manner is 50-54 cm, and the seasonal thawing depth on nearby stabilized fields with the same peat thickness is 58-62 see. In the first year of dehydration, when the minimum thickness of the seasonal layer of 54 tayivan reaches the 45 cm section, equal to the maximum plowing depth of the marsh-shrub PBN-100 plow, in early August, channels are cut across the entire surface of the track m plowing plow on the slope of the area at intervals equal to the width of the channel (capture plow), laying the inverted reservoir on the natural surface. Then discharge excess, water in the fall and melt water in the spring of next year by gravity through the canals. in the middle of the reservoir by shifting the reservoir back into the canals with a bulldozer in their mouth part. After melting the multi-year ice during the warm, second year of drainage period, the seasonal thawing depth in the area is 82-90 cm (counting from that is by 24–28 cm greater than the depth of seasonal thawing on the operated stabilized fields with the same peat capacity. At the end of the warm period, the channels are opened with a bulldozer to drain water from them samoteko.m, and then they are eliminated by displacing the reservoir removed during the passage back to the channels with a bulldozer with an oblique shaft, since the drying process is considered complete and further work is done for land use in arable land or under hayfields. The use of land drainage in the permafrost zone accelerates the process of melting perennial ice from 10–15 years to 2 le1, prevents overwetting of the soil, the formation of thermokarst depressions with soaking of crops, and the yield of drained lands, which significantly increases the yield of drained lands and reduces the cost of drainage work, taking into account operating costs for the first 10-15 years and the cost of the previously required major overhaul of land.

Claims (1)

METHOD OF DRYING LANDS IN THE PERMANENT FROZEN AREA, including extracting drainage channels and draining water through them, characterized in that, in order to increase the efficiency of drainage and accelerate the thawing of perennial ice, drainage channels are torn off over the entire surface of the drained territory at intervals equal to their width, and after the removal of autumn excess and spring melt water, the channels are locked for a period of positive average daily air temperatures. after which the channels open and discharge water formed from melting ice over many years.