The large drainage at the bottom of the lake flows through many villages in Douliu and Linnei. The width of the channel is only 4 to 8 meters and will be widened to 12 to 15 meters. (Photo provided by Yunlin County Government)
The lakebed drainage that flows through many villages in Douliu City and Linnei Township has formed a flood bottleneck due to multiple aqueducts crossing the drainage along the line. Flooding disasters are reported every time there are heavy rains. The Water Resources Department has approved the county government's control project of 300 million yuan. After confirming the completion of more than 110 land acquisitions, the improvement project will be launched. It is expected to be completed before the 2028 flood season.
Lake Dapai is located in Linnei Township and Douliu City, with a water collection area of about 700 hectares. It flows through villages such as Jianxin, Jiuxionglin, Yingpanyuan, Xiachangliuzai, Dingchangliuzai and Sheungshuiweikou, and finally merges into Qianxi River. Due to the narrowness of some river channels and the obstruction of cross-channel aqueducts, Due to the obstruction of water flow and the insufficient height of the embankment, overflowing occurs during heavy rains. Especially during Typhoon Kemi at the end of July 2024, the section from the lower reaches of National 3 to the drainage outlet was severely flooded. A large amount of floodwater overflowed to the vicinity of Wenshu Temple, and nearby people complained.
The county water conservancy department pointed out that after the typhoon, legislator Zhang Jiajun and others invited the Water Conservancy Department and other units to conduct on-site surveys. The county government proposed an overall management improvement plan, which was approved by the central government. Since the project involved 110 private land expropriations, after multiple local explanations and negotiated price purchases, the land acquisition was finally completed, and the project was successfully launched at the end of October.
Xu Hongbo, director of the Water Resources Department, said that in response to extreme climate, short-duration heavy rainfall has become the norm. The 25-year recurrence period of large-scale drainage at the lake bottom is to prevent the flow from overflowing the embankment before the flood peak. The project funding is 180 million yuan. The implementation content includes, channels The width was widened from 4 to 8 meters to 12 to 15 meters, the semi-gravity revetment length was improved to about 3.3 kilometers, 10 bridges were improved, 791 meters of new flood control roads, 3 lifting stainless steel aqueducts, and 7 embankment rear inflows were built.
Xu Hongbo said that the cross-canal aqueduct that originally blocked the flow of water was changed to a lifting design, which can maintain the water supply function for farmers at ordinary times, and can be lifted to a high place during heavy rains to avoid hindering flood discharge. After the completion of the entire project, the flood section and flood control standards of the large drainage at the bottom of the lake can be improved, reducing the risk of overflowing during heavy rains, and allowing local residents to bid farewell to the suffering of long-term flooding.
The large drainage at the bottom of the lake flows through many villages in Douliu and Linnei. The width of the channel is only 4 meters and will be widened to 12 to 15 meters. (Photo provided by Yunlin County Government)
