Authorities have issued warnings about Liwu River Danger after water levels surged in Hualien County. The erosion of a barrier lake dam upstream intensified risks for downstream communities.
The Forestry and Nature Conservation Agency’s Hualien branch reported that the overflow channel near Swallow Grotto in Taroko National Park has widened. Consequently, the increased water flow further eroded the landslide dam. Officials warned that this could cause additional damage or even collapse the dam, further raising water levels downstream.
In response, the Hualien County Government advised the public to avoid the downstream riverbed and urged residents in Minle Village, Sioulin Township, to evacuate immediately. Authorities emphasized the seriousness of the Liwu River Danger and requested full public cooperation.
Emergency crews have been working to excavate the riverbed and lower the dam. However, a contractor explained that the widening of the overflow channel tripled water flow, washing away the backfill and complicating mitigation efforts. These conditions highlight the persistent threat of Liwu River Danger in the area.
Experts note that barrier lake dams are vulnerable to erosion, especially after heavy rainfall or increased water flow. When such dams weaken, downstream flooding can occur rapidly, affecting homes, infrastructure, and ecosystems.
Local authorities have coordinated evacuation plans and are monitoring the river around the clock. They have also placed warning signs and barriers to prevent unauthorized access to the hazardous areas. The Forestry Agency continues to assess the structural stability of the dam while crews manage controlled water flow.
Liwu River Danger has drawn attention to the importance of river management in mountainous regions. Officials suggest further preventive measures, including reinforcing natural dams, monitoring erosion patterns, and improving emergency response strategies.
Residents are advised to follow government instructions and remain vigilant. Officials confirmed that additional updates will be provided as conditions evolve, and further evacuations may be required if water levels continue to rise.
The ongoing situation underscores the unpredictable nature of Liwu River Danger and the need for rapid, coordinated action to protect public safety and property.

