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驰名中外的敦煌月牙泉,独卧沙漠2000余年而未被湮没,被视力沙漠一大奇观。然而,70年代以来,泉周围的沙山变形,南山北坡、北山南坡下滑,山体向泉心移动,月牙泉日益缩小变形,水位下降,大有逝于流沙之虞。 月牙泉之恙惊动了治沙专家韩泽民、吕爱香夫妇。他们为探明月牙泉缩小的原因,在鸣沙山下搭起帐篷,日夜观测,餐风露宿两冬春,终于得出了月牙泉的形成在于鸣沙山独特的山水共存的自然环境的科学结论。他们认为,导致月牙泉缩小变形,水位下降的主要原因是60年代为保护鸣沙山和月牙泉而在其北迎风坡大面积栽种的杨树林。此时此地的造林,不仅没有起到固沙作用,反而破坏了月
Well-known at home and abroad Dunhuang Crescent Moon Spring, one bedroom desert more than 2,000 years without being obliterated by the vision of a spectacle desert. However, since the 1970s, the deformation of Shashan around the spring, the northern slope of Nanshan Mountain and the southern slope of Beishan Mountain have moved downward. The mountains have moved to the spring center, the crescent spring has been gradually shrinking and the water level has dropped, greatly threatening the quicksand. Crescent Moon spring astonished the governance experts Han Zemin, Lu Aixiang couple. To find out the reasons for the shrinking Crescent Moon, they set up tents under the Mingsha Mountains, observed night and day, and lunged in winter. Finally, they came to the scientific conclusion that the formation of Crescent Spring is a natural environment where the unique landscape of Mingsha Mountain coexists . They believe that the main reason causing the crescentic spring to shrink and its water level to drop is poplar forests planted over large areas of northern windward slope in the 1960s for the protection of Mingsha Mountain and Crescent Moon Spring. At this point of afforestation, not only did not play a role in sand, but destroyed the month