摘要
本文利用土壤中重力水渗透的模式,提出华北平原降水渗透深度的计算式。根据降水量和降水前的土壤湿度计算渗透深度,其百分误差约为11%,误差的平均值为4.6厘米。综合作物、土壤、底墒和蒸发(散)四方面的因素,提出了华北平原春季的“透雨”指标。它包括必需的降水量和渗透深度,“透雨”的计算结果与实测资料是相符的。
Using the conception of the infiltration of gravity moisture,a model for estimating infiltration depth is presented,by means of the rainfall and the soil moisture before rain.Comparison with observations made in four stations shows an error of about 11%and average error of 4.6 centimiters.From four factors(characteristics of the soil,the kind of crop,soil moisture storage and evapotranspiration)an index for estimating the amount of soaking rain is presented.Here"soaking"means enough rainfall for adequate growth of the major crop concerned and an infiltration depth to provede adequate soil moisture.Results of calculation are tested with actual determinations.
作者
陶祖文
裴步祥
Tao Zuwen;Pei Buxiang(Academy of Meteorological Sciences of National Meteorological Bureau)
出处
《气象学报》
1983年第1期97-105,共9页
Acta Meteorologica Sinica
