design rainfall return period 设计降雨重现期
Rainstorm design return period of one year, the ground water catchment time for 10 minutes.
暴雨设计重现期为一年，地面集水时间为10分钟。
On the other hand, major systems are designed for severe rain storms with a design return period of 50 to 100 years.
另一方面，大型系统用于应对严重的暴雨，设计应对50到100年一遇的暴雨。
The hydrologic design values of specific design return period or frequency are random variables having certain distribution pattern, so there are some uncertainty in it.
指定设计重现期或频率的水文设计值为随机变数，有一定的分布规律，表明它有相应的不确定性。
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