河北省东部平原区降水不同去向的定量研究

A Quantitative Study of Different Directions of Rainfall in Plain Area of the East Part of Hebei Province

通过1984～1989年,在河北省东光县实验站的定位观测,对降水的不同去向进行了定量研究。结果表明,6年平均地表径流深49.1mm,占年降水总量(536.0mm)的9.2%。补给地下水79.7mm,占14.9%。补给土壤水407.2mm,占75.9%。水浇地冬小麦和夏玉米两季作物耗水716.3mm,需人工浇水309.1mm才能维持土壤水的周年平衡。纯旱地土壤水储量平均每年亏损50.6mm。

Through long-term fixed position observations in the years of 1984-1989,a quantitativestudy of different indicated that the average depth of surface runoff in 6 years was 49.1 mm,accoounting for 9.2% of total annual rainfall(536.0 mm).The supplemented subsurface waterwas 79.9 mm,accounting for 14.9% and supplemented soil moisture was 407.2 mm,ac-counting for 75.9%.Total amount of water consumption of two crops—winter wheat in ir-rigated lands and summer corn was 716.3 mm.In this case,309.1 mm to be supplemented byirrigation can maintain yearly balance of soil moisture.And the yearly average soil water lossstored in dry farmland was 50.6 mm.