Abstract

Size distributions of saltating aleurite and sand particles have been measured in a windsand flux in a desertified area in Astrakhan oblast. The distributions are approximated by a sum of lognormal distributions for the aleurite-sand and aleurite fractions. The threshold wind velocity for the total particle concentration is determined under conditions of nonintermittent saltation. It is found that the threshold velocity depends on the size of saltating particles. Empirical approximations of the total number concentration and differential particle concentration of aleurite and sand particles as functions of wind velocity are obtained.

中文翻译：

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风对盐化颗粒尺寸分布的影响

摘要

在阿斯特拉罕州沙漠化地区的风沙通量中，测量了盐化的辉石和沙粒的尺寸分布。分布通过无硅藻土-砂和无硅藻土组分的对数正态分布的总和来近似。总颗粒浓度的阈值风速是在非间歇盐析条件下确定的。发现阈值速度取决于盐化颗粒的尺寸。获得了随风速变化的闪锌矿和沙粒总数浓度和微分颗粒浓度的经验近似值。