Water Resources Agency,MOEAWater Resources Agency,MOEA

Project background
After Typhoon Morakot 2009, there was substantial increase in accumulated siltation at Zengwen and Nanhua Reservoirs (total siltation of about 110 million m3). Severe landslides and debris flow at the upstream catchment areas have greatly lowered the capability for water resources conservation and water supply capacity of reservoirs. This seriously affected the stability of water supply in the southern region which required immediate actions to accelerate conservation of catchment areas, desiltation of reservoir storage areas, and renewal and upgrade of facilities. There were also apparent needs to develop dispatch and backup water supply systems and water sources for the stability of mid-term water supply and extension of reservoir service life in the southern region during the post-disaster period. A water supply stabilization plan was therefore defined under the provisions of the “Special Act for Management of Zengwen, Nanhua, and Wushantou Reservoirs and Stabilizing Water Supply conditions in Southern Area”. The bill was submitted to the Executive Yuan for ratification and has been implemented.

Project objectives and delegation of duties

Plan period:2010~2015
Budget source:
Water Resources Operation Fund 10.0 billion TWD
Special Budget for Economic Revitalization 28.5 billion TWD
Initial budget allocation of the respective agencies 15.5 billion TWD

Budget source

Projected benefits

• To ensure facility safety and extend reservoir service life, the project aims to reduce sediment production at the catchment areas, reduce siltation and driftwood accumulation at the reservoir storage area, and enhance capacity for flood and siltation control of reservoirs.
• In addition, the project is expected to strengthen the water source dispatching and backup capacity and provide diversified water sources development for the stabilization of mid-term water supply requirements of the southern region.

Zengwen Reservoir

 
Nanhua Reservoir