SU1724787A1 - Erosion control bed hydraulic structure - Google Patents

Abstract

The invention relates to rural and forestry. The goal is to increase the efficiency of the bottom structure. The anti-erosion hydraulic structure consists of a watercourse. A dam 3 is located across the lower part of the watercourse bounded by the slopes 2. The base of the dam 3 intersects one on the watercourse of a triangular transverse profile or several on the watercourse of the trapezoidal transverse profile of the trenches 5. The trenches 5 are interconnected by vertical slots 6 and filled with filter material 7 The reduced part of the watercourse and the upper level of the trenches 5 correspond to the calculated layer of accumulation of products of solid runoff before the dam. 1 hp ff, 3 ill.

Description

SP

WITH

R

„; W

2

FIELD OF THE INVENTION The invention relates to agriculture and forestry, in particular to the fight against gully erosion.

The purpose of the invention is to increase the efficiency of the bottom structure.

FIG. 1 shows a hydraulic bottom structure on a watercourse with a triangular cross-section; figure 2 is the same with a cross section in the form of a trapezoid, view in plan; on fig.Z - section aa in figure 2.i

Across the axis of the watercourse 1, limited by the slopes 2, there is a dam 3, the base 4 of which crosses one (on a watercourse with a triangular cross-section) or several (on a watercourse with a trapezoid cross-section) trenches 5 connected to each other He has 6, and filled with filter material 7.

The construction works as follows.

Through a water course 1, bounded by slopes 2, local runoff is passed, which delays dam 3. Water floods the overlying section of trenches 5, the length of which is determined by the elevation mark of dam 3. Through filter material 7 of the flooded trench section 5, excess local runoff flows under the bottom of dam 4 in the underlying section of trench 5, the length of which is equal to the height of dam 3. At waterway 1 with a cross section in the form of a trapezoid (Fig. 2), local runoff is redistributed between trenches 5 in gap 6.

As a result of water filtration through the trench under the dam base, the overflow of excess flow through the ridge of the bottom structure and its destruction are excluded.

As a filtering material in the trench, slag is advisable, the rock mine workers, gravel, is empty.

In order for trenches not to silt, they should be placed above the lowest parts of the drain. The amount of silting will be limited to the marks of the lowest part of the watercourse and the top of the trenches. Even in case of exceeding this

the silting volume of the accumulation layer will be deposited directly in front of the dam. At the same time, the upper sections of the trenches will not be silted.

Claims (1)

Invention Formula 5 1. Anti-erosion hydraulic bottom structure including a trench cut along the bottom of the water course along its longitudinal axis, filled with filtering material and located across the longitudinal axis of the dam, characterized in that. In order to increase the efficiency of the facility, the dam is made with a cross section, the base of which is larger than its crest, the base of the dam is placed on filtering material, while the length of the section of the trench located above the dam is limited to the lower part of the watercourse, 0 equal to the maximum backed water level in front of the dam. 2, The construction of pop, 1, characterized in that the dam is made with a cross section in the form of a trapezoid, while 5, the watercourse and in the dam section, the trench is made in the form of two parallel depressions, communicating with each other located parallel to each other and perpendicular to parallel depressions 0 creams filled with filter material.