caa a22 4500 386389233 CHVBK 20180307112109.0 cr unu---uuuuu 161130s1989 xx s 000 0 eng 10.1017/S0269727000010903 doi S0269727000010903 pii (NATIONALLICENCE)cambridge-10.1017/S0269727000010903 Anderson Robert S. Earth Sciences Board, University of California, Santa Cruz, CA 95064, U.S.A. Saltation of sand: a qualitative review with biological analogy [Elektronische Daten] [Robert S. Anderson] In the last two decades both experimental and theoretical research in aeolian sediment transport has greatly enhanced our quantitative understanding of the saltation process. I emphasise the qualitative understanding of saltation that has emerged in part through development of a numerical model consisting of four subprocesses: (1) aerodynamic entrainment, (2) grain trajectories, (3) grain-bed impacts, and (4) momentum extraction from the wind. Each sub-model encapsulates the physics of the process, and is constrained, where necessary, by experimental data. When combined, the full model allows simulation of aeolian saltation from inception by aerodynamic entrainment to steady state. The results are encouraging, showing both qualitative and quantitative correspondence with wind tunnel measurements. In an attempt to further the qualitative understanding of the problem, an analogy is proposed between the saltation population and a biological population, wherein both individual and collective properties are considered. Although at present these models lack the detail to treat the true complexity of the natural world - in particular the wetness of beach sands and the potential role of beach vegetation - they serve both to develop our intuition about the natural setting, and to guide future experimental efforts. Copyright © Royal Society of Edinburgh 1989 Physics and Physical Geography nationallicence Proceedings of the Royal Society of Edinburgh. Section B. Biological Sciences Royal Society of Edinburgh Scotland Foundation 96(1989), 149-165 0269-7270 96<149 1989 96 PRB https://doi.org/10.1017/S0269727000010903 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0269727000010903 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Anderson Robert S. Earth Sciences Board, University of California, Santa Cruz, CA 95064, U.S.A NATIONALLICENCE 773 0- Proceedings of the Royal Society of Edinburgh. Section B. Biological Sciences Royal Society of Edinburgh Scotland Foundation 96(1989), 149-165 0269-7270 96<149 1989 96 PRB CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge