Among various natural disasters, the flood and water-logging is the primary disaster, because its great regions were suffered and occurred frequently.
在各种自然灾害中，洪、涝、渍害是主要灾害之一，受害面积广，出现频率高。
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。
The characteristics of rainfall and flood are illustrated. The reasons of disaster are analyzed and the measures of flood and water logging control are also discussed.
阐述了1991年降雨和洪水的特征，分析了产生洪涝灾害的原因，并对今后的治理措施进行了探讨。
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