The International Workshop on Environmental Changes and Sustainable Development in Arid and Semi-arid Regions

• 来源期刊: 幕-国际地学杂志（英文版）
• 年，卷（期）: 2007,（4）
• 页码范围: 297-298
• 页数: 2页
• 语种: 英文

摘要

Arid regions,dominated by deserts,are characterized by a severe shortage of moisture,and a lack of perennial and integrated systems of drainage.Distributed over a very large range of temperatures,from the very hot to the very cold zones,arid regions cover about one third of the world's land surface and occur in every continent,including Antarctica.