民勤沙井子地区近四十年来风沙活动状况及其与治沙造林的关系

Sandbiown Activity in Recent Forty Years in Shajingzi Area of Minqin and Its Relationship to sand Control Afforestation

本文通过流沙面积调查,沙丘移动和有关的气象观测,结合五十年代观测资料,对比分析了沙井子地区近四十年来风沙活动状况,认为本区风沙活动从整体上是逐渐减弱的,但并不排除沙丘活化,风沙再起的可能性,并探讨了治沙造林控制风沙活动的生态效益。

Under the methods of investigation of shifting dune area,observation of dune movement and relerant meteorological observations,comparing with the obserration data of 1950s.this report make a detailed study of the change of sandblown activity in shajingzi.Area of Minqin County in recent 40 years,holding that the sandblown activity is decreasing as a whole in this area but remaining the possibility of increasing again.Furthermore,the ecolog- ical benefit of afforestation to control the sandblown endangerment is analysed.