腾格里沙漠东南缘沙丘形态示量特征及其影响因素

对腾格里沙漠东南缘主要类型沙丘形态示量及其影响因素分析认为，沙丘高度与间距之间具有明显的幂函数关系，而且这种关系所反映的沙丘动态（加积或前移）随沙丘类型、分布而异。影响沙丘规模与间距的因素比较复杂，粒度的影响没有普遍性；背风侧次生气流尺度对简单横向沙丘具有一定的控制作用；输沙率的影响表现在，各尺度等级风成床面形态及规模对输沙率的变化具有不同时空尺度的响应。

CHARACTERISTICS AND CONTROLLING FACTORS OF DUNE MORPHOMETRY IN THE SOUTHEASTERN FRINGE OF TENGGER DESERT

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 dynamieal variations (verticalaccretion,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 secondaryairflow may partially control the spacing of simple transverse dunes. The morphology and size ofdifferent orders of eolian bedforms have a certain influeces on the local sand transport rate in differenttemporal and spatial scales.