M. S. Zverkov
All-Russian Research Institute of Irrigation Systems and Agricultural Water Supply «Raduga», 38, pos. Raduzhnyi, Kolomenskii gorodskoi okrug, Moskovskaya obl., 140483, Russian Federation
Abstract. The problem of irrigation erosion has the great value. The relevance of the study consists of its orientation at the prevention and elimination of accelerated (anthropogenic) erosion and the realization of the required erosion control measures. The paper considers the question of determining the pressure of artificial rain on the soil. At the moment of raindrops impact, there is the tension in the soil, which is called vertical effective pressure p(e). The equation for calculation p(e) is proposed in this study using the known spectrum of raindrops. Effective pressure p(e) was 1.4 Pa (coefficient of variation C(v) = 0.43, significance level p is less than 0.05) for the artificial rain by sprinkler machine “Fregat” with the intensity of 0.2 mm/min and the height of drops falling of 2.2 m; and p(e) was 5.9 Pa (C(v) = 0.66, p is less than 0.05) for long distance sprinkler DD-30 with the intensity of 0.7 mm/min and the same height of drops falling. For the same conditions and according to the method of B.M. Lebedev the pressure was 0.2 Pa (C(v) = 0.01, p is less than 0.05) for the rain from “Fregat” and 1.1 Pa (C(v) = 0.01, p is less than 0.05) in the case of DD-30. The pressure value according to the proposed method depends on the width of the range of raindrops (correlation coefficient r = 0.94) and the number of drops (r = -0.73). The method allows examining the pressure, caused by raindrops, on the soil. It can also be useful in determining the irrigation rate before the runoff.
Keywords: effective pressure of rain; irrigation erosion; sprinkling; range of raindrops; diameter of drops; raindrop impact; rain intensity; artificial precipitation.
Author Details: M. S. Zverkov, Cand. Sc. (Tech.), senior research fellow (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.).
For citation: Zverkov M. S. Examination of Artificial Raindrops Pressure on the Soil Caused by Sprinklers. Dostizheniya nauki i tekhniki APK. 2018. Vol. 32. No. 8. Pp. 73–77 (in Russ.). DOI: 10.24411/0235-2451-2018-10820.