Environmental Engineering Reference
In-Depth Information
Table 15.12.
Leakage measured in modern CFRD.
First filling
During operation
Water depth
at full
Max
Max
Water
Height
supply
leakage
Water
leakage
depth
Long-Term
Comments on leakage
Dam name
(m)
level (m)
rate (l/sec)
depth (m)
rate (l/s)
(m)
rate (l/sec)
trends
Comments
Aguamilpa
185.5
182.5
260
169.5
150-200
165-175
50-100
Seasonal fluctuations
Face slab cracking
in leakage rate related
developed on first
to reservoir level. Peak
filling. Long term
leakage rate at peak
rate shows steady
reservoir levels.
increasing trend.
Alto
140
135
1800
125
450
135
130
Seasonal trends in
Remedial works
Anchicaya
leakage rate are
following first
unknown. Rate known
filling to fix joints
to vary with rainfall and
in slab.
reservoir level.
Bastyan
75
70
10
70
10-25
70
5
No fluctuations in
Long-term near
reservoir level.
constant leakage
Leakage fluctuations
rate established
related to rainfall
approx 5 years
events. Long-term
after first filling.
leakage rate only
fluctuates by 2-3 l/s.
Brogo
43
28.5
42.5
28.5
5-10
30
4-5
Progressive decrease
Near constant
in leakage rate to
long-term rate
4-5 l/s over 8 years
with little apparent
following first filling.
relationship to
rainfall or
reservoir level
Cethana
110
101
60-70
Approx. 80
20-80
96
5-10
Max recorded leakage
Base rate
related to rainfall events.
stabilised 4 years
Long-term base leakage
after first filling.
rate stable at 5-10 l/s.
(Continued)
Copyright © 2005 Taylor & Francis Group plc, London, UK
