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 Cause
of the Project
- Due to the
1998 Zeb typhoon and Babs typhoon flooding
of 345 acres and 343 acres lands, the Executive
Yuan in the 2603rd meeting appraised and appointed
the WRA to execute the “Keelung River Control
Construction Early Stage Plan,?expecting
to reach the protection criteria of 10-year-flood
frequency, with subsequent second stage plan
to be executed.
- The second stage plan
and the integrated overall report (draft)
were proposed to the Executive Yuan in April
2000.
The results are summarized as the following:
- The
initial estimated budget was 105 billion
NT dollars, and the takedown of thousands
of local houses is difficult to execute.
Further research should be done for
alternative, executable plans.
- In consideration
of the budget, priority should be placed
on feasibility analysis of Yuansantze
Flood Diversion Project paired up with
flood insurance or other alternative
plans.
- The overall proposal
should be further analyzed and appraised,
and should be resubmitted to the Executive
Yuan with the completion of practical
feasible plans.
The brain area of Keelung
River is 491 km2 The drainage area of Yuansantze
Flood Diversion Tunnel approximates 90 km2.
The tunnel was designed to divert drainage
1,310 m3 per second ,which is the peak flow
of 200-year flood. According to hydraulic
analysis,it can lower the downstream water
level downstream about 1.5 m in average
 
 
 
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