Table 1: Key parameters
Parameter |
Units |
Value |
|
|
|
Existing (2009 survey) |
After raising |
Catchment area |
km2 |
2.57 |
No change |
a) permanent impoundment |
m3 |
106,000 |
No change |
b) controlled flood storage |
m3 |
Nil |
233,000 |
c) Total |
m3 |
106,000 |
339,000 |
Surface area at overflow level |
m2 |
68,000 |
No change |
Crest of non-overflow embankment |
mOD |
88.02 |
91.10 |
Maximum storage level |
mOD |
87.02 |
89.72 |
River Bed level |
mOD |
80.8 |
No change |
Dam height above stream bed |
m |
7.4 |
10.5 |
Diameter of orifice to attenuate flood flows |
m |
N/A |
0.35 |
|