【摘要】 <正> 一、流动沙漠风沙流模式 塔克拉玛干沙漠中沙丘的形态很复杂,大体上可分为新月形沙丘、沙链状沙丘、穹状沙丘和金字塔形沙丘4种类型。沙丘形态是流沙移动的产物,沙丘运动实际上是风运移流沙的过程。风沙流动往往是一种整体的移动,故在研究风沙流时我们不是从单一的沙粒运动着手,而是从沙丘整体形态的运动着手进行分析的。更多还原

【Abstract】 Sand flow by wind is a type of entire movement of sand grains. Sand flow indensity, defined as the total weight passing through a unit area for a unit time, is dependent upon morpholic coefficient of dune, density of sand grains and dunes, relative heights of dune and velocity of dune movement. The sand flow indensity on Takla Makan is on the same level as that of water erosion. Based upon analysis of every factor the author solves the problem of qualitative calculation of the sand flow by wind.更多还原