
A lake that formed in a landslide last month now seems to be on the brink of collapse and could cause a flood in Hualien. The lake is located upstream of the Mataian馬太鞍 River. More than 600 people have been evacuated from seven villages downstream of the lake. Authorities believe heavy rains from Typhoon Podul could cause the lake’s embankment to give in. Let’s hear more.
Lin Ching-shui
Guangfu Township
There is a 48-hectare lake caused by a landslide upstream of the Mataian River. We’re afraid that it will collapse, so we’ve evacuated 245 households. That’s about 650 people.
Ms. Lai
Guanfu resident
Of course I’m shocked. I’m nervous. Like, how could this happen so suddenly? It’s scary.
The barrier lake has a maximum surface area of 300 hectares and contains up to 8,600 tons of water. That’s as much as a whole Nanhua Reservoir. If the dam breaks, all areas downstream would become a disaster zone in just 30 minutes. Currently, the lake is just 25% full, but that’s still 2,288 tons of water that could come pouring out anytime soon.
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#lake #dam #barrierlake #landslide #evacuation #warning #hualien #nature
花蓮”馬太鞍溪”上游,因為颱風「薇帕」帶來的驚人豪雨,引發國有林地大規模崩塌,就怕楊柳颱風帶來豪雨,造成堰塞湖溢頂,週二下午,下游7村進行預警性的撤村,撤離人數約有600多人。
[[光復鄉鄉長 林清水]]
“馬太鞍溪上游,有48公頃的堰塞湖,我們怕它潰堤,所以變成我們這次強制撤離,大概就有245戶,650個(人)左右”
[[光復鄉居民 賴小姐]]
“當然會錯愕啊,我也是緊張說,怎麼突然會這樣子啊,也是會怕啦”
堰塞湖滿水位可蓄水8600萬立方公尺,相當於一座南化水庫,一旦潰堤,只要半個小時,下游的村落就將成為致災區。雖然目前堰塞湖蓄水量約2288萬立方公尺,約25%,但相關單位不敢大意,預警性撤離。
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