KALLADA IRRIGATION PROJECT



Salient Features

1.General

State

Kerala

District

Kollam

River

Kallada

Latitude

77deg;4rsquo;20rdquo;East

Longitude

8deg;57rsquo;00rdquo;North

2.Hydrology

nbsp;

Annual Rainfall

305cms

Catchment area of Reservoir

549sq. km

3.Reservoir

nbsp;

Name of Dam

Kallada(Parappar)

Construction Started

1972

Completed

May 1986

Type of Dam

Masonry straight gravity with spillway

Length of Dam

335m

Length of Overflow section

42m

Length of non-overflow Section

393m

Maximum height above

nbsp;

deepest foundation

85.35m

Top width of Dam

7.62m

Top of Dam (roadway)

+118.87m


Top level of Parapet +119.87m

Full Reservoir Level +115.82m

Maximum Water Level +116.77m

Low Water Level

nbsp;

+70.25m

Tail Water Level

nbsp;

+69.65m

Gross Storage at FRL

524 Mm3

Gross Storage at MWL

536 Mm3

Live Storage at FRL

nbsp;

507 Mm3

Dead Storage Capacity

17.00Mm3

Water Spread area at FRL

23SqKm.

Type

nbsp;

Gated Ogee Type

Type of Crest Gates and Size

Radialnbsp; 12.19m acute; 9.14m

Number of Crest Gates

3 Nos

Crest Level

nbsp;

+106.68m

nbsp;

Head Over Crest

nbsp;

9.14m

Design Discharge

nbsp;

2830cumecs

Capacity of low level Outlets 3.75m diameter conduit with sill level + 70.25m amp; discharge capacity 60 cumecs

5.Auxiliary spillway without control gates

Location

Onnbsp; right flank of masonry dam

nbsp;

Length

56.00m

Crest level

+116.73m

nbsp;Design discharge 689m3/sec

Type

Labyrinth weir

Gates

No gates,freeflow

6.Saddle Dam

Length

225.70m

Maximum Height

12.51m

7.Pick-up Weir

River Sluice

1nbsp; No. (2.44 size)acute; 1.83m

Length of Weir

120.69m

Crest Level

+63.09m

Deepest bed level

+57.50m

Width of roadway over weir

4.27m

Number of span

7

Maximum upstream flood Level

+68.45m

Maximum D/s flood level

+65.84m