METHOD TO DETERMINE LOSSES OF WATER FOR FILTRATION FROM CHANNELS WITH ANTI-FILTRATION LINING Russian patent published in 2014 - IPC E02B3/16 E02B13/00 

FIELD: measurement equipment.

SUBSTANCE: invention relates to the field of hydraulic engineering, in particular, to methods for determination of water losses from irrigation ditches. The method consists in arrangement of an insulated compartment in a ditch, comprising two polymer water impermeable links, which for the time of determination of filtration losses are closed into slots on the bottom of the ditch at the distance of 30÷50 m, with subsequent hydraulic insulation of joint areas. Maintenance of polymer water impermeable links in the stable position is carried out with the help of a metal polymer rope pulled into open holes in the upper part of links and fixed to coastal anchors. To reduce impact in process of measurements of external factors, on top between water impermeable links there is a tent pulled from light impermeable polymer film. Measurement of water level in the compartment is carried out in special pockets fixed at the outer side to links and communicating with an insulated compartment with the help of three rows of holes in upper, middle and lower parts. For measurement of water level each pocket is equipped with a portable needle level metre (point-gauge) with a vernier scale division price of 0.1 mm, which is fixed on the metal stand, installed in the upper part of the slope above the measured water level.

EFFECT: increased accuracy of measurement of water losses for filtration from channels with anti-filtration lining.

4 cl, 3 dwg