However, when irrigation application decreased by 25% the salt accumulation in root zone will not be obvious and the subsurface drainage flow will decrease by 31.4%.
现状灌溉用水量减少25%时，作物根区没有产生明显的积盐，地下排水量减少31.4%。
The rainwater design discharge, drainage flow and rainwater storage volume are analyzed and calculated, and the calculation method of rainwater storage volume is given.
阐述了凤冈县常用集流面种类及各自的特点，以及一户四口之家雨水集蓄利用的蓄水工程容积、集流面积的计算方法。
Calculation of designed flood drainage flow rate has significant importance for water safety and effectively reduction of economic loss from water logging disaster in low-lying region.
圩区设计排涝流量的计算对圩区的水安全和有效减免涝灾经济损失有着重要意义。
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