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田间渗漏损失的测量或预测,对于有效灌溉和确定土壤淋洗定额,尤其是确定阻碍渗漏发生的粘性土壤的淋洗定额,具有重要的实践意义。在禁止蒸发和自由蒸发两种条件下,可利用测渗仪和张力计的工艺,来确定密实粘土的水力特性及水量损失,其中的导水率由计算的渗流通量作为土壤含水量的函效确定:导水率与土壤含水量之间的指数关系为K=ae~(?)。本文利用张力计读数确定的渗流通量相蒸渗通量,与利用测渗仪测量的剖
Measurement or prediction of field leakage losses is of great practical significance for effective irrigation and for determining soil rinsing quotas, in particular for determining the leaching quotas of sticky soils that would prevent seepage. Under the conditions of no evaporation and free evaporation, the hydromechanics and water loss of compacted clay can be determined by using the technology of the measuring instrument and the tensiometer. The hydraulic conductivity of the compacted clay is calculated from the calculated seepage flux as the function of soil moisture content Effectiveness determination: The exponential relationship between hydraulic conductivity and soil water content is K = ae ~ (?). This paper uses tensiometer readings to determine the percolation flux phase flux, and the use of measuring instrument measured by dissection