PAZHASSI IRRIGATION PROJECT



Salient Features

1.GENERAL

State

KERALA

District

KANNUR

Taluk / Village

Thalassery

Latitude

11ordm; 5939;00quot;(N)

Longitude

75ordm; 3739;00quot;

River

Valapattanam river

2.STRUCTURAL FEATURES OF DAM

Type

Masonry barrage.

Top Width (Bulk Head)

5.49 M

Bottom Width (-do-)

14.02 M

Length

245 M

Maximum Height from bed level

18.29 M

Slope :Upstream

Vertical

Down stream

2:1.

3.HYDROLOGICAL FEATURES OF DAM

Catchment Area

640 Sq.Km

Probable Maximum Flood (PMF)

3500 cumecs

Method of Estimating PMF

Unit Hydrograph

SPILLWAY

Location

Kuiloor

Type

Masonry

Total Length

138 M

Crest Level

13.72 M

Design Capacity of spill way

3500 cumecs

Number, type and size of gates

16 nos. Radial (6.1 x 5.18 M size)

RESERVOIR FEATURES

Top Bank Level

27.52M

Maximum Water Level

27.44 M

Full Reservoir Level

26.52 M

Minimum draw down level

24.66 M

Dead Storage Capacity

Nil

Gross storage capacity

97.5 Mm3

Free board over F R L

1 M

Free board over M W L

1.48 M

Area of Reservoir at F R L

650 Ha

4.HEAD SLUICE

Spill way

24.66 M

Spill Channel

Nil

Instrumentation

Electrically operated radial