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盘式吸渗仪吸渗率计算方法比

, PP. 56-62

Keywords: 吸渗率,盘式吸渗仪,计算方法

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Abstract:

选用盘径为5cm和15cm的盘式吸渗仪,对杨凌塿土(粘土)和神木砂黄土(砂壤土)两种质地的土壤在0、-3、-6、-9、-12cm水头5种负压下进行了室内吸渗实验,分析了不同盘径和负压对累积吸渗量的影响;并选用4种吸渗率公式对这两种质地土壤吸渗率进行了计算,以Vandervaere法为参考方法对该4种方法的适用性进行了分析。结果表明,在相同的时间内,两种土壤5cm盘径下的累积吸渗量均大于15cm盘径下的累积吸渗量,砂黄土累积吸渗量大于相同负压下塿土累积吸渗量;在4种吸渗率计算方法中,无论塿土还是砂黄土,Haverkamp公式所得吸渗率值与参考方法最接近。

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