关键词: 腾格里沙漠, 沙丘形态, 影响因素

Abstract: Analysis on the major types of dune morphometry and its controlling factors in the southeastern fringe of Tengger Desert shows that the power-functional relation between dune height and spacing varies with dune types and locations and reflects dune dynamical variations (vertical accretion,migration and extinction). The factors that control dune size and spacing are very complex. There is no general relation between dune spacing and grain size. The dimension of leeside secondary airflow may partially control the spacing of simple transverse dunes. The morphology and size of different orders of eolian bed forms have a certain influeces on the local sand transport rate in different temporal and spatial scales.

Key words: Dune morphology, Height and spacing, Tengger Desert