Geoscience Reference
In-Depth Information
450
314
400
Dam crest elevation 312.00 m a.s.l.
312
350
310
Side channel spillway crest elevation 309.30 m a.s.l.
300
inflow
outflow (303.03 m a.s.l.)
outflow (309.30 m a.s.l.)
water level in reservoir (303.03 m a.s.l.)
water level in reservoir (309.30 m a.s.l.)
308
250
200
306
150
304
100
302
50
0
300
0
10
20
30
40
50
60
70
80
90
100
Time [h]
Fig. 3 Transformation of flood wave
Q
0.5%
for the existing outlet installations (corrected spillway
discharge), initial levels of water dammed in reservoir 303.03 and 309.30 m asl
700
314
Dam crest elevation 312.00 m a.s.l.
600
312
500
310
Side channel spillway crest elevation 309.30 m a.s.l.
inflow
outflow (303.03 m a.s.l.)
outflow (309.30 m a.s.l.)
water level in reservoir (303.03 m a.s.l.)
water level in reservoir (309.30 m a.s.l.)
400
308
300
306
200
304
100
302
0
300
0
10
20
30
40
50
60
70
80
90
100
Time [h]
Fig. 4 Transformation of flood wave
Q
0
:
1
%
for the existing outlet installations (corrected spillway
discharge), initial levels of water dammed in reservoir 303.03 and 309.30 m asl
The spillway can be reconstructed without a necessity of reservoir emptying;
also its safety is ensured because flood waves can pass through spillway without any
negative consequences. A significant drawback of spillway reconstruction is the
lack of possibility of improving the operating conditions of freshet wave routing.
