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阿克苏地区春季土壤水分垂直向运动
Authors
王积强
Publication date
1 January 2008
Publisher
Abstract
土壤中毛管水是传递压力的,毛管水运动的方向,受土壤上层温度变化和土面蒸发制约,与土壤中汽态水的运动方向(由热至冷)一致。下午和晚上因地面辐射而冷却,闭塞空气收缩,潜水向上通过毛细管吸入闭塞空气中,潜水位下降;上午和白天因地面日晒,土温升高,闭塞空气膨胀,排出较粗毛管水,成为重力水而下渗,抬升潜水位。春天大风,土温升高,晚上使潜水位升高,白天土面蒸发加大,又使潜水位下降。用潜水蒸渗仪,可测到大风天改变土壤水分运行的方向
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Institutional Repository of Xinjiang Institute of Ecology and Geography, CAS
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Last time updated on 29/11/2016