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本文探讨了用于土壤系统分类的土壤水分和温度状况的简易推算方法。由Penman干燥度公式计算年、月干燥度间按确定土壤水分状况等级,公式中的E_0值取水文站E_(601)蒸发器实测值,或由气象站20cm口径蒸发器实测值经折算而得。根据当地土温与气温的相关性,由气温资料推算年平均土温和冬夏季土温差,从而确定土壤温度状况等级。
This article explores a simple derivation of soil moisture and temperature conditions for the classification of soil systems. According to the formula of Penman dryness, the soil water condition grade is determined according to the determination of the soil moisture status in the year and the month. The value of E_0 in the formula is taken from the measured value of the E_ (601) evaporator or from the measured value of the 20cm caliber evaporator of the weather station . According to the correlation between local soil temperature and air temperature, the annual average soil temperature and soil temperature difference between winter and summer are deduced from the air temperature data to determine the soil temperature status grade.