Environmental Engineering Reference
In-Depth Information
Table 15.12.
(Continued).
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
Chengbing
74.6
69.5
75
Unknown
60
63.5
20
Fluctuations in leakage
Max leakage
rate closely related to
during construction
reservoir level. Min rate
when reservoir
10 l/s at water depth
level rose above
less than 50 m.
face slab.
Crotty
83
75
45-50
67
50-70
70-75
30-35
Max recorded leakage
Base rate stabilised
related to rainfall events.
2 years
Long-term base leakage
after first filling.
rate reduced from
45-50 l/s to 30-35 l/s
over 2 years.
Foz Do Areia
160
155
236
150.5
Unknown
Unknown
60
Long-term rate at water
Long-term rate
depth of approx 150 m.
established 5 years
Fluctuations in leakage
after first filling.
rate unknown.
Golillas
125
122.5
1080
115
600-700
115
270-500
Fluctuations in leakage
Long term rate
rate are unknown.
established approx
15 years after
completion of first
filling.
Guanmenshan
58.5
57
10
57
Unknown
Unknown
5-6
Little change in leakage
No apparent
rate in 4-5 yrs since
relationship
first filling.
between reservoir
level and leakage
rate.
Ita
125
119.5
Unknown
Unknown
1700
Unknown
380
Long term rate
Max leakage rate
established by dumping
measured 4
sand/silty sand on face
months after first
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