光电子集沙仪对毛乌素沙地沙丘蚀积过程的观测

本实验是由3台改装后的法国光电子集沙仪(每隔10s自动记录1次)对毛乌素沙地高大流动沙丘的7a观测的37万个数据,结合风速资料,绘制出相应各年、月、日、时的风沙流风蚀和堆积的实量图。详尽准确地描述了各种风速对新月型沙丘的迎风坡、丘顶、背风坡的具体蚀积变化。该实验弥补了国内外在野外长期实地观测沙丘移动规律的空白。

Observation of Wind Erosion Status of Sand Dunes in Mu Us Sandy Land by French Photoelectron Collectors

Three hundreds and seventy thousands data for seven years on mega-dunes of Mu Us sandy land were observed by using three refitted French photoelectron sand collectors (automatically recorded once per 10 seconds). Based on these data and the corresponding wind velocity data, the vectorgraphes reflecting wind erosion and accumulation of sand-shifting flow were drawn at year, month, day, and hour scales. These have accurately described the concrete erosion/accumulation change on windward slop, top, leeward slope of barchan under the variant wind speeds. This experiment has filled the vacancy of field observation for a long period on the law of sand dune movement at home and abroad.