METHOD OF INCREASING SLOPE STABILITY OF FEEDING DRAINAGE CHANNEL Russian patent published in 2017 - IPC E02B11/00 

FIELD: agriculture.

SUBSTANCE: non-chernozem zone, including but not limited to closed drainage, use of drained land and exploitation of drainage systems, as well as during the reconstruction, capital and current repairs of feeding drainage channels. The proposed method applies to slope of catchwater drain which is internal relative to drainage system. A method of increasing slope stability of feeding drainage channel, including underwater and above-water portions with slope ratios of m_u and m_o respectively, depending on the structure of potting soil profile, its mesh-size distribution and groundwater outcrop on a slope, lies in the fact that the cross-section of the above-water portion of the channel is excavated in the form of anisoplural trapeze. Ratio of each of the two slopes of the above-water portion of the channel, which position is fixed to the end of the snowmelt in the field with regard to the operation of slope drainage, are taken separately, depending on the orientation of each slope of the channel x, channel position on a slope y by multiplying m_o by corrective ratio k_o=f(x,y) determined for each slope with regard to the prevailing in the cold period of the year wind of north-westerly direction, accumulation of snow on the slope and moisture in its potting soil, freezing of the slope, length of snow melting and thawing of slope potting soil. M_o value is taken with regard to the depth of the above-water portion of the channel.

EFFECT: improved analytical model of slope stability of feeding drainage channel, increased slope stability of these channels, reliability and durability of their perfomance not lower than the standard service life, cost-effective use of funds for construction of feeding channels and reduced costs of their operation, increased reliability and durability of drainage system perfomance, from which the excess water is discharged.

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