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作者:下水道,要让城市更美好 |纷达网

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[...] 在一次又一次的“大雨倾城”中,常常会出现“多少年一遇”的概念,似乎是在为饱受诟病的城市排水系统喊冤。事实上,的确有一个名为“重现期”的概念。它指的是在一定长的统计期间内,等于或大于某暴雨强度的降雨出现一次的平均间隔时间,通俗点说,“多少年一遇”似乎也没什么太大问题。(对这个问题的详细分析,请看《“N年一遇”为何年年遇?》) [...]


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