NCKU installs sediment monitor to prevent further flooding disasters
NCKU installs sediment monitor to prevent further flooding disasters
2026-09-30
It’s been a year since a barrier lake along the Matai’an River overflowed, causing devastating flooding in Guangfu township, Hualien. Now, even a year on, over 200 million cubic meters of silt remain accumulated upstream. To ensure the safety of people’s lives and property, a team from National Cheng Kung University installed an automated high sediment concentration monitor on the river’s temporary bridge last week. The system can keep track of sediment content in the river water 24 hours a day and transmit the data in real time, assisting personnel in instantly assessing flood risks.
A disaster prevention team from National Cheng Kung University just finished setting up this sediment concentration monitor on the temporary bridge over Hualien’s Matai’an River. Over 200 million cubic meters of earth and sand are still piled up upstream, posing a threat to downstream residents.
Doong Dong-jiing
NCKU hydraulic engineering department chair
The biggest challenge on-site is the impact from massive amounts of earth and sand. Normal upstream rainfall, changes in river water levels, and fluctuations in sediment concentration shouldn’t damage the equipment, as we’ve already implemented some protections.
The system can keep running 24 hours a day, constantly monitoring the sediment content in the water and transmitting data back in real time to assess flood risks.
Shih Mon-hsien
NCKU Coastal Ocean Monitoring Center project specialist
When floods or heavy rains strike, we can control it remotely to make high-frequency observations. By switching to the event mode, we can take a reading every six minutes.
In addition to continuous, intensive monitoring, the Forestry and Nature Conservation Agency is also planting more vegetation along hillsides to prevent rockfalls and landslides.
Huang Chun-tse
FANCA Hualien branch director
In early September, we completed seeding five types of vegetation over about 20 hectares. Altogether this year, we’ve planted about 40 hectares of vegetation.
Experts from across disciplines are working together to prevent another disaster caused by Hualien’s extreme landscape.
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#MataianRiver #barrierlake #floodcontrol #Hualien #sediment #NCKU #FANCA
防馬太鞍溪堰塞湖事件再現 成大設高泥沙濃度監測系統
2026-09-30
馬太鞍溪堰塞湖潰壩事故到今天已經滿一週年，但上游依然堆積超過兩億立方公尺的土堆，為確保民眾生命財產安全，成功大學防災團隊上週正式在馬太鞍溪鋼便橋，完成架設高泥砂濃度自動化監測系統，能二十四小時監測河水中的泥砂含量，並即時回傳，協助監測人員即時評估淹水風險。
成功大學防災團隊在馬太鞍溪鋼便橋架設防洪新利器，「高泥砂濃度自動化監測系統」。因為仍有2億多立方公尺的土砂堆積在上游河道，對下游居民造成威脅。
[[成功大學水利及海洋工程學系主任 董東璟]]
“現場最大的挑戰，就是有大量的土沙的一個衝擊，正常的河川的上游降雨，河川水位的變化，含沙濃度的變化這個不會對儀器造成損壞，因為我們已經做了一些保護”
這套設備可以24小時運作，隨時監測水中泥砂含量，即時回傳數據，立即評估淹水風險。
[[成大近海水文中心計畫專員 施孟憲]]
“當有洪水大雨來襲的時候，我們可以透過遠端控制它，把它改成加密觀測，把它改成事件模式，變成每六分鐘觀測一筆”
除了持續密集監測，林保署也積在山坡上積極增加植被，防止土石崩落。
[[林保署花蓮分署長 黃群策]]
“就是在九月初的時候，我們完成了大概二十公頃，五種植生的一個投放，大概完成了今年，完成了四十公頃的一個植生投植”
各路專家配合努力，防堵堰塞湖溢流釀災事件再次發生。
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