The typical arid area in Northwest China covers about 25% of the whol e territory, mostly desert and gravel plain known as Gobi.

• 我国西北干旱区土地总面积约占国土总面积的25%25,大部分被戈壁,沙漠所覆盖;近几十年来沙漠化扩大的速度愈来愈快,形势严峻。