METHOD OF PREDICTING OF SUPERFICIAL SINK OF THAWED SNOW Russian patent published in 2009 - IPC G01N33/24 A01B13/16 

FIELD: physics; measuring.

SUBSTANCE: invention concerns to field of protection of soils from erosion. The method includes measuring for 1-1.5 months prior to the beginning of snow thawing of soil freezing depth, definition of water reserve in snow, an ice crust and soil only in a stratum 0-50 cm. If soil thawed or its depth of freezing is less than 0.5 m or (and) moisture reserves in a layer of soil of 0-50 cm less or are equal to 0.2-0.4 from blanket pore volume - predict, that the sink will miss. If freezing depth is more than soil 0.5 m and water reserves in a layer of earth of 0-50 cm above 0.2-0.4 from blanket pore volume the sink will depend only on water reserves in snow, an ice crust and soil and its quantity count under the formula where Y - quantity of the superficial sink, mm; Yi - a sink from i agrobackgrounds, mm (count on equation Yi=a+b₁W_s+b₂W_sn in which W_s - water reserves in soil, mm; W_sn water-reserves in snow and an ice crust, mm; a, b₁ and b₂ are the coefficients changing depending on a view of an arable land and type of soils: on winter tillage - grey wood soil a =-161, b₁=0.93, b₂=0.38; typical chernozem a =-50, b₁=0,25, b₂=0,25; ordinary chernozem a =-53, b₁=0,51, b₂=0,04; chestnut a =-27, b₁=0.38, b₂=0.37; light-brown and =-11, b₁=0.23, b₂=0.37; on the obturated arable land - grey wood soil a =-11, b₁=0,12, b₂=0,33; typical chernozem a =-116, b₁=0,71, b₂=0,41; ordinary chernozem a =-24, b₁=0.17, b₂=0.40; chestnut soil a =-4, b₁=0.19, b₂=1.14; light-brown a =-20, b₁=0,29, b₂=0,13); Si - the area of i agrobackgrounds, hectares; Yef, Yea, Yeh, Yeoe - flow regulating effect from application forest improving, agrotechnical, hydraulic engineering and organisational-economic (the crop rotation factor) receptions, mm. The expedient allows to raise accuracy of forecasting of the superficial sink of thawed snow on reservoirs.

EFFECT: increase of accuracy of predicting of the superficial sink of thawed snow on reservoirs.