The Wushanling Headrace Tunnel connects Zengwen Reservoir and Wushantou Reservoir, supplying water for domestic, industrial, and agricultural purposes in the Chianan region. Upon completion of the new tunnel, the original water flow rate of 56 CMS can be restored, ensuring a stable supply of agricultural water for over 60,000 hectares of farmland, public water for 2.5 million people, and industrial water for the Southern Taiwan Science Park. This will enhance the stability of regional water resource management, with the existing old Wushanling Tunnel serving as a backup system.