中文摘要：

弦月春天是宝贵自然遗产。然而，在弦月春天附近的 megadunes 的动态特征不是众所周知的。这纸份量上由解释在 1985 和 2004 拍摄的天线相片并且分析沙丘 crestlines 和从 2011 ～ 2012 收集的风数据在弦月春天附近学习了 megadunes 的特征和变化。结果表明金字塔沙丘被复杂的风政体形成。弦月春天没被因为稳定的风政体和金字塔沙丘的相对稳定性，转移沙埋葬。在春天附近的沙丘的 crestlines 在 1985 和 2004 之间向北方移动了。面对南方滑动脸而另外的脸在免职下面，也被暴露弯屈侵蚀，因此显示南方的风相对被提高。在春天的北方在 Dunhuang 绿洲限制高防风林和体系结构的规模是必要的维持风政体和沙运输的动态平衡。

英文摘要：

The Crescent Moon Spring is a precious natural heritage. However, the dynamic characteristics of megadunes around the Crescent Moon Spring are not well known. This paper quantitatively studied the character- istics and changes of megadunes around the Crescent Moon Spring by interpreting aerial photographs taken in 1985 and 2004 and analysing the dune crestlines and the wind data collected from 2011 to 2012. Results revealed that pyramid dunes were formed by a complex wind regime. The Crescent Moon Spring was not buried by shifting sands because of the stable wind regime and relative stability of pyramid dunes. The crestlines of the dunes around the spring moved northward between 1985 and 2004. The south-facing slip faces were also exposed to wind ero- sion, whereas the other faces were under deposition, thus indicating that the southerly wind was relatively en- hanced. Limiting the scale of tall windbreaks and architectures in the Dunhuang oasis at the north of the spring was necessary to maintain the dynamic equilibrium of the wind regime and sand transport.