SU852189A1 - Method of regulating thawing water flow - Google Patents

Description

one

The invention relates to the field of agriculture, namely to means of protecting the soil from water erosion.

A known method of combating water erosion, including cutting in the fall of the cracks across the slope 1.

The disadvantage of this method is the low permeability of the gaps due to their filling with water during the period of thaws and snowfall, with subsequent frosting.

There is also known a method for regulating the flow of melt water by making anti-erosion rollers terraces 2.

The disadvantage of this method is the slow absorption of melt water and the soaking of agricultural crops due to the freezing of the first part of the terraces.

The purpose of the invention is to accelerate the process of absorbing the retained water and eliminate the draining of agricultural crops.

This is achieved by cutting the slots along the excavation part along the contour of the terrace shaft, offset from the lower mark of the notch to the side of the shaft slope within the protection of its snow bed, and the slits are cut to a depth equal to half the freezing depth of the usual slopes of the zone and notch marks equal to Vs of the shaft inclination length.

The drawing shows a scheme for the implementation of the proposed method for regulating the flow of melt water (cross section of the slope).

The diagram shows a shaft-terrace 1, the bottom mark 2 of the excavation part, a slit 3, cut at a distance equal to / from the length of the slope of the shaft-terrace 1 from the bottom mark

10 excavation part 2, interterra space 4, snow bed 5, freezing zone 6, snow accumulation zone 7, silty deposits 8.

When implementing the method in the excavation

15 parts of the shafts-terraces, a snow cushion 5 is formed, preventing deep freezing of the soil in this place, as a result of which the slot 3 does not completely freeze. During the period of thaw and spring snow, no such water leaks through the snow bed 5 into the excavation part and through the unfrozen bottom and part of the walls of the gap is quickly filtered into the soil. With intensive runoff at the end of the snow, most of the melted

25 water with particles of soil suspended in it enters from the interterrenal space into the excavation part, at the lower elevation 2 a significant part of the suspension precipitates. Tala water, freed from a significant part of the suspension, is filtered through a slit located on the wet slope above the lower mark of the notch 2. Since the slit is located at / 3 the length of the slope from the notch, it is well protected by snow and silt particles have time to settle below it. The use of the predlozhennogo method allows to exclude soaking of winter and perennial grasses, since the ponds of the terraces within 0.5-2 days are freed from water.

Claims (2)

1. A method for regulating the flow of melt water, which includes the manufacture of anti-erosion roller shafts-terraces, characterized in that, in order to accelerate the process of absorbing the retained water and eliminate draining agricultural crops, along the excavation part but the contour of the shaft-terrace with an offset from the lower part of the notch toward the side of the shaft within the protection of its snow underlay cut gaps. 2. A method according to claim 1, characterized in that the slits are cut to a depth equal to half the depths frozen by the usual slopes of the zone and at a distance from the lower notch mark equal to / 3 the length of the shaft inclination. Sources of information taken into account in the examination 1. USSR author's certificate number 328835, cl. A 01B 13/16, 1970. 2. USSR author's certificate number 371866, cl. A 01B 13/16, 1970 (Prototin). eight 2 3