Vol. 31, issue 06, article # 11

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.

Keywords:

sand wind flux, saltation, saltating sand particle concentration, particle size distribution, four-channel photoelectric counter, size distribution approximation, lognormal distribution

References:

1. Shao Y. Physics and modeling of wind erosion. New York: Springer, 2008. 452 p.
2. Zheng X. Mechanics of windblown sand movements. Berlin: Springer-Verlag, 2009. 290 p.
3. Byutner E.K. Dinamika pripoverhnostnogo sloya vozduha. L.: Gidrometeoizdat, 1978. 158 p.
4. Zolotokrylin A.N. Klimaticheskoe opustynivanie. M.: Nauka, 2003. 247 p.
5. Semenov O.E. Vvedenie v eksperimental'nuyu meteorologiyu i klimatologiyu peschanyh bur'. Almaty: KazNIIEK, 2011. 580 p.
6. Shulyak B.A. Fizika voln na poverhnosti sypuchej sredy i zhidkosti. M.: Nauka, 1971. 400 p.
7. Gorchakov G.I., Titov A.A., Buntov D.V. Parametry nizhnego sloya sal'tatsii na opustynennoj territorii // Dokl. AN. 2009. V. 424, N 1. P. 103–106.
8. Gorchakov G.I., Karpov A.V., Kopejkin V.M., Zlobin I.A., Buntov D.V., Sokolov A.V. Issledovanie dinamiki sal'tiruyushchih peschinok na opustynennyh territoriyah // Dokl. AN. 2013. V. 452, N 1. P. 669–676.
9. Gorchakov G.I., Karpov A.V., Sokolov A.V., Buntov D.V., Zlobin I.A. Eksperimental'noe i teoreticheskoe issledovanie traektorij sal'tiruyushchih peschinok na opustynennyh territoriyah // Optika atmosf. i okeana. 2012. V. 25, N 6. P. 501–506; Gorchakov G.I., Karpov A.V., Sokolov A.V., Buntov D.V., Zlobin I.A. Experimental and theoretical study of the trajectories of saltating sand particles over desert areas // Atmos. Ocean. Opt. 2012. V. 25, N 6. P. 423–428.
10. Cheng H., Zou X.-Y., Zhang C.-L. Probability distribution functions for the initial liftoff velocities of saltating sand grain in air // J. Geophys. Res. 2006. V. 111, N 22. Р. D22205.
11. Rasmussen K., Sorensen M. Vertical variation of particle speed and flux density in aeolian saltation: Measurement and modeling // J. Geophys. Res. 2008. V. 113. P. F02S12.
12. Karpov A.V., Gushchin R.A., Datsenko O.I. Analiz variatsii skorosti perenosa sal'tiruyushchih peschinok // Optika atmosf. i okeana. 2017. V. 30, N 3. P. 227–232; Karpov A.V., Gushchin R.A., Datsenko O.I. Analysis of variations in the saltating sand grain transport velocity // Atmos. Ocean. Opt. 2017. V. 30, N 5. P. 456–461.
13. Huang N., Zheng X., Zhow Y., van Pelf R.S. Simulation of wind-blown sand movement and probability density function of liftoff velocities of sand particles // J. Geophys. Res. 2006. V. 111, N D20. P. D20201.
14. Gorchakov G.I., Karpov A.V., Kopejkin V.M., Sokolov A.V., Buntov D.V. Vliyanie sily Sefmana, pod"emnoj sily i elektricheskoj sily na perenos chastits v vetropeschanom potoke // Dokl. AN. 2016. V. 467, N 3. P. 336–341.
15. Gorchakov G.I., Karpov A.V., Kuznetsov G.A., Buntov D.V. Kvaziperiodicheskaya sal'tatsiya v vetropeschanom potoke na opustynennoj territorii // Optika atmosf. i okeana. 2016. V. 29, N 6. P. 472–477; Gorchakov G.I., Karpov A.V., Kuznetsov G.A., Buntov D.V. Quasiperiodic saltation in the windsand flux over desertified area // Atmos. Ocean. Opt. 2016. V. 29, N 6. P. 501–506.
16. Bagnold R.A. The Physics of Blown Sand and Desert Dunes. London: Methuen, 1941. 265 p.
17. Gordon M., McKenna Neuman C. A study of particle splash on developing ripple forms for two bed materials // Geomorphology. 2011. V. 129. P. 79–91.
18. Belyaev S.P., Nikiforova M.K., Smirnov V.V., Shchelchkov G.I. Optiko-elektronnye metody izucheniya aerozolya. M.: Energiya, 1981. 232 p.