雨彈狂炸!台中台灣大道如小河 「貨車拋 - 台中

By Quanna
at 2022-06-30T10:27
at 2022-06-30T10:27
Table of Contents
特地回這篇文章
只是要提供更多數據來說明6/29下午4-6點降雨造成台灣大道淹水現象
1.是不是強降雨?
強降雨這個名詞在學術上尚未有太多定義
但這幾年被廣泛濫用,只要看到雨下得很大,新聞就會說強降雨
但6/29下午的降雨到底算不算強降雨?
根據大雅雨量站在6/29下午4點與5點的數據
時降雨強度分別為41mm/hr跟26mm/hr
西屯雨量站則為45.5mm/ht跟29mm/hr
南屯雨量站則為28mm/hr跟45mm/hr
雨量強度低於50mm/hr,一般要講為強降雨是有點牽強。
2.台灣大道榮總到高速公路段的「淹水」
其實就很像你將一杯水快速倒在坡面上,無論坡面多會吸水
倒太快就會產生坡面上的大量逕流流動
興建滯洪池或許有點幫助,但幫助不是太明顯
台灣大道的排水管線能夠負荷多少量或許是主要問題
3.如果降雨強度尚未達50就會發生這樣的現象
那想必這個雨季或台灣大道排水管線尚未增大負荷量前的雨季
這種新聞現象只會不斷出現
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