It is believed that the rain-water and waterlogging drainages play a basic role for the safeguard of urban area.
城市排涝与排水是关系到城市安全的基础工作。
The severity of waterlogging is not only related to the rain intensity, but also associated with the cumulated precipitation and the precipitation duration.
降水积水的严重程度不仅与降水强度相关， 也与累积降水量和降水持续时间的长短有关。
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