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中国哪里最干旱
更新时间: 2020-11-10 00:00:00  

中国的宁夏北部、青海西北部、西藏北部最干旱,水分不足是限制植物生长的主要因素。中国干旱区外缘山地,由于其高大的山体截取高空气流中的水汽,因此获得较多降水,在我国西部地区的迎风坡,年降水量可达700—800mm,甚至更多,因此在山地可形成河流,河川径流出山口以后,分散流经于由戈壁构成的极易渗漏的冲积扇上。

关键词: 中国 哪里 干旱

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