【摘要】 本文根据水分平衡的原理,通过对蒸散量、径流量和截留量等的定量估算以及对降水量分布规律和变化特征的分析,对我省农田水分供应条件进行初步分析,并分别计算了对秋粮作物和夏粮作物影响较大的7～8月和3～4月的水分盈亏状况。为进一步揭示贵州的旱涝特征和合理开发利用水分资源提供科学依据。更多还原

【Abstract】 In this paper, we have calculated the rainfall evapotranspiration and run- off in Guizhou province, basing on the water balance principle. The rainfall distribution over this region, and its variations were described and analysed Thus, a preliminary estimate of the field water supply was made. In order to reveal the features of flood and drought, we have also culculated the water balance between July and September, and between March and April so as to provide the basis for exploiting actively and using adequately the water reso- urces in this province.更多还原