VAZHANI IRRIGATION PROJECT



Salient features

1. General

State

Kerala

District

Thrissur

Taluk/Village

Thalappilly

Latitude

10 038rsquo;N

Longitude

760 19rsquo;E

River

Wadakkanchery

Year of Completion

1959

2. Structural Features of Dam

Type

Earth Dam

Top Width

4.55M

Bottom Width

130m

Length

792.48m

Maximum Height from bed level

26.91m

Volume Content of Dam Body

Slope ndash; upstream amp; down stream

U/S 2.5:1 to 4:1 from top to bottom

D/S 2: 1 to 3:1

3. Hydrological Features of Dam

Catchment Area

20.48 Km2

Probable Maximum Flood

294.04M3

4. Spillway

Location

South side of Dam

Type

Ogee

Total length

26.48m

Crest level

59.81m

Design capacity of spillway

294.04 m3

4Nos. Gate shutters

Number, type and sizes of gates

6.62x2.67m Screw gearing shutter

Regulating Gate : 0.90x 1.20m

U/S of wall of 3.10m dia.

5. Reservoir Features

Top bank Level

+65.53m

Maximum water level

+62.48m

Full reservoir level

+62.48m

Minimum drawdown level

+39.62m

Dead storage capacity

1.471Mm3

Gross storage capacity

18.12Mm3

Freeboard over F.R.L

3.05m

Reservoir Area at F.R.L

1.82 Sq. km

Free board over M.W.L

3.05m