METHOD OF DETERMINATION OF SOIL RAINWATER INFILTRATION RATE

摘要

FIELD: mining engineering.;SUBSTANCE: method comprises soil permeability test and determination of soil rainwater infiltration rate according to the design formula. Soil porosity shall be preliminary calculated and soil electrical resistance values shall be determined. These correspond to minimum and maximum values of soil volume humidity. Then the two electrodes located at a given distance from each other are introduced into soil to a given depth. Then the target intensity of rain water infiltration is determined by measuring current value of soil resistance as well as soil resistance value after the set time. After that the target rate of infiltration shall be determined according to the following formula: where I - infiltration rate of rain water in the soil; R_max and R_min - electrical resistance values of soil corresponding to the minimum and maximum values of soil volume humidity; R₀ and R₁ - soil electrical resistance values at the beginning and at the end of measurement; P - soil porosity; H - electrode depth.;EFFECT: increased accuracy of measurement results and capability of direct instrumental measurement of rain water infiltration rate in any area of interest.;1 dwg