Four-channel photoelectric counter of saltating sand particles
D.V. Buntov1, R.A. Gushchin1,2, O.I. Datsenko1,2
1A.M. Obukhov Institute of Atmospheric Physics Russian Academy of Sciences, Pyzhevsky per., 3, 119017, Moscow, Russia
2Moscow Technological University, Prospekt Vernadskogo, 78, Moskva, 119454
Keywords: ветропесчаный поток, сальтация, концентрация сальтирующих песчинок, распределение песчинок по размерам, четырехканальный фотоэлектрический счетчик, аппроксимация функции распределения, логнормальное распределение, sand wind flux, saltation, saltating sand particle concentration, particle size distribution, four-channel photoelectric counter, size distribution approximation, lognormal distribution
Abstract
A four-channel photoelectric counter has been worked out and manufactured for the measurements of saltating sand concentration fluctuations and size distribution function of particles with diameters > 30 mm over desertified areas. The measurement results are given. It is shown that the vertical profile of the saltating sand concentration does not change on average in the altitude range from 3 to 7 cm over a desertified area in the neighbourhood of Volga. The distribution function of saltating sand particles over the desertified area is approximated with satisfactory precision by the lognormal distribution near the distribution maximum. Noticeable distinctions between above mentioned distributions for large and small sand particles are observed.
|
