Zengwen Reservior Anti-silt tunnel project
Zengwen Reservior
Anti-silt tunnel project
Proprietor: Southern Region Water Resources Office, WRA, MOEA
Location: Dapu Township, Chiayi County, Nanxi
District, Tainan City
Construction outline:
Due to the lack of sand discharge
facilities at the bottom of the reservoir, the Zengwen Reservoir can only open
a higher-elevation spillway to discharge the flood during the flooding period,
and discharge the clearer water in the upper layer, resulting in the storage of
mud and discharge of the clearer water, which not only wastes water resources
but also causes serious deterioration of siltation. In response to this
problem, the plan is to build a new anti-siltation tunnel under the left dam
abutment of the reservoir to discharge the density current and muddy water out
of the reservoir in a timely manner, to slow down the siltation of the
reservoir and extend the life of the reservoir.
Construction
content:
a. Elephant
Trunk Diversion Steel Pipe Section 57.02m
b. Inlet
tunnel section 58.20m
c. Gate
shaft section 31.15m
d. Tunnel
section (including transition section) 869.82m
e. Stilling
basin and Outlet tunnel section 213.11m
f. Outlet
slope and outlet work 46.88m
g. Hydraulic
machinery such as radial gates and emergency gates and electrical and lifting
equipment
h. Zengwen
Lake Road Tunnel Full Length is 207.79m, of which the tunnel is 171m long
i.
Finish date: 2017/11/28