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21.
由中国干旱区研究学者申元村、汪久文、伍光和、韩德麟等教授合著的《中国绿洲》一书 ,近日已由河南大学出版社出版与读者见面 ,这是我国从事干旱区研究的读者早已盼望的一本专著 ,将对我国干旱区研究和绿洲建设的理论与实践起到深刻影响 ,将进一步推动我国绿洲体系的研究并为建立起我国完整的绿洲学研究体系作出贡献。如果说 2 0世纪是我国研究荒漠化 (砂质荒漠化、沙漠化 )的世纪 ,则 2 1世纪将是我国研究绿洲化的新纪元 ,这本书的出版 ,无疑具有历史性的作用。此本专著在下述方面具有突出特点。首先该书是至目前我国绿洲研究上最系统最完… 相似文献
22.
The Tarim Desert Highway in Xinjiang, China, the longest one in the world, has a lengthof 562 km, about 80% of which runs across, from north to south, the Taklimakan Desert. Obviously,the main problem of the road maintenance is the blown sand disaster. The research resultsshowed: (1) the physical environment along thedesert highway is characterized by strong winds,fine and loose ground materials, different dunes and so on, which provides the dynamical conditionand material source for the formation of blown sand disaster to the road and its shelter system.Meanwhile, the trend and cross-section of the road and the structure of the shelter system, asdamage objects, play important roles in the formation process of blown sand disaster; (2) theblown sand disaster to the shelter system is original from the intrusion of the drift sands and mobiledunes outside the shelter system, and the wind erosion and sand deposit caused by the air streamchanges on the ground in the shelter system. The main damage object in the Tarim Desert High-way is the shelter system presently. The damage forms include wind erosion, sand burying anddune covering; and (3) the damaged length of the blocking sand fences is 83.7%, 88.4%, 72.4%,72.8% and 40.3% and the damaged area of the straw checkerboard belts is 73.1%, 58.2%, 44.5%,35.4% and 36.6%, in turn, in 5 different landform units from north to south, and, the disasters tofences and the straw checkerboard belts are 79.5% and 57.6% in the compound dunes while theyare 64.6% and 37.7% in the interdunes respectively. 相似文献
23.
关于新疆北部额尔齐斯河与乌伦古河流域的地貌早已引起学者们的注意,这主要由于乌伦古河下游的集水湖盆——布佺托海与额尔齐斯河河床相距极近而并未沟通的奇特现象所引起的。1905—1906年和1908—1909年,俄国学者В.В.萨波日尼科夫(Сапо- 相似文献