Overview

The VV Sagar Dam is constructed across Vedavathi river near Marikanive village in Hiriyur Taluk of Chitradurga district during the year 1897 to 1907.  The Vedavathi river is a tributary to Krishna river.  The main object of VV Sagar Project is to provide irrigation facility in the drought prone areas of Chitradurga district. This Project provides irrigation to 25,000 acres of land by constructing a non-over flow Dam of 43.28 m height (142 ft) above the lowest river bed spanning between hill abutments for a length of 405.50 m (1330 ft). The irrigation is proposed under high level canal taking-off from the main dam on the left bank and, left bank and right bank canals taking – off from Kathrikeyanahalli Anicut constructed 8 kms below the Dam.

The gross storage capacity of the Reservoir formed by the construction of the Dam is 850.30 mcum (30 tmc).  The utilisation contemplated under the Project is 148.32 mcum (5.25 tmc).

The Dam has a catchment area of 5374 sq km (2075 sq miles) which includes an intercepted catchment area of 3820 sq km (1475 sq miles).  The annual yield expected at the Dam site varies from a minimum of 48 mcum to a maximum of 455 mcum. The main Dam built across the Vedavathi river consists of non-overflow Dam. The surplussing arrangement consists of a waste-weir located at 2.40 km to North of Dam by cutting the saddle.  The length of the weir is 143 m (468 ft) and is designed to pass the designed flood discharge of 991 cumecs (35,000 cusecs) under a spillage depth of 1.82 m (6 ft).

Construction History

Details of construction of the existing dam and its appurtenant structures are not available as the dam is constructed during the year 1897 to 1907.

Salient Features of the Project

Name of the river Vedavathi
Location of dam Near Marikanive village of Hiriyur taluk in Chitradurga District
Longitude 750 01′ 00″ E
Latitude 130 20’ 0” N
Means of Access The dam site is accessible by a 20 km long approach road from Hiriyur which takes off from the Bengaluru-Pune NH4

Click on the above image to enlarge

Geophysical features

Total Catchment area 5374.00 sq km (2075 sq mile)
Independent catchment area 1554.00 sq km (600 sq miles)
Intercepted catchment area 3820.00 sq km (1475 sq miles)
Nature of catchment Upper most reaches consist of Hilly terrain with a rainfall of 3912 mm and lower reaches in plain arid region with rainfall of 457 mm
Mean annual rainfall 600 mm (24 inches)
Climate Moderate with annual mean temperature of 310 C
General Characteristics of Soil in the Command area Red & B C Soil
Annual yield at dam site Yield varies from minimum of 48 mcum to a maximum 455 mcum
Utilization (gross) 48.32 mcum (5.25 tmc)
Geological features Chitradurga schist belt belonging to Dharwar group resting over Bababudans forms the local geology and Banded Iron Formations Dolamatic siliceous limestone underlain by quartz chlorite schist forms the local geology.

Technical Details

Gross storage capacity 850.30 mcum (30 tmc)
Dead storage capacity 47.80 mcum (1.875 tmc)
Live storage capacity 802.50 mcum (28.125 tmc)
Lowest river bed level RL 612.80 m (RL 2010.50 ft)
Dead storage level RL 631.09 m (RL 2070.50 ft)
Full reservoir level RL 652.43 m (RL 2140.50 ft)
Maximum water level RL 654.25 m (RL 2146.50 ft)
Top of dam RL 656.08 m (RL 2152.50 ft)
Water spread area (at FRL) 8763 ha (21,645 acres)

Type of dam A Non over flow dam built in rubble masonry in lime surki mortar.
Length of the dam 405.40 m (1330 ft)
Deepest foundation level RL 606.70 m (RL 1990.50 ft)
Lowest river bed level RL 612.80 m (RL 2010.50 ft)
Max height of dam above lowest foundation level 49.38 m
  (RL 656.08 m – RL 606.70 m)
Max height of dam above lowest river bed level 43.28 m
  (RL 656.08 m – RL 612.80 m)
Top width of dam 4.57 m (15 ft)

Type Broad crested waste weir
Location 2.40 km to North of Dam in the saddle cutting
Length 143 m (468 ft)
Crest width 1.20 m
Crest elevation RL 652.43 m (RL 2140.50 ft)
Maximum water level RL 654.25 m (RL 2146.50 ft)
Spillage 1.82 m
  (RL 654.25 m – RL 652.43 m)
Design flood discharge adopted for spillway design 991 cumecs (35000 cusecs)

Numbers One
Type Stoney type
Location Ch 30.00 m
Sill level RL 631.09 m (RL 2070.50 ft)
Vent size 1.67 x 3.90 m (5’ 6” x 12’ 9”)
Discharge 28.91 cumecs ( 1021.00 cusecs)
Atchkat 10117 ha (25000 acres)

Irrigation Sluice Left bank sluice/Right bank sluice
Numbers 05-May
Location Near K.K.Anicut 8.00Kms away from Dam
Size 5.00ft x4.00ft/5.00ft x4.00ft
Types of gates Rectangular Gates/ Rectangular Gates
Sill level
Discharge(Cumecs/Cusecs) 325 Cusecs/325 Cusecs

Particulars Left bank canal Right bank canal Branch canal (if any) High level canal (if any) Low level canal (if any)
1 2 3 4 5 6
Take off From Near K.K.Anicut 8.00Kms away from Dam Near K.K.Anicut 8.00Kms away from Dam From LBC-Bidarakere branch canal Jadegondanahally branch canal From RBC-Hoovinahole branch canal Samudradahally branch canal Kundalagura branch canal Ch 300.00 m from River sluice
Length(km) 48.00KM 46.40KM 22.67KM 9.40KM
No of Distributories 39 53 23
Capacity of Head (Cumecs/Cusecs) 325 Cusecs 325 Cusecs 55.00 Cusecs
Croping pattern As per original paddy As per original paddy As per original paddy As per original paddy
  As per actual garden As per actual garden As per actual garden As per actual garden  
Total irrigated area in Acre/Ha 4793 Ha 3957 Ha 2937Ha 448 Ha
Taluk/Dist benifited Hiriyur/ Chitradurga Hiriyur/ Chitradurga Hiriyur/ Chitradurga Hiriyur/ Chitradurga
Lined/Unlined(km) 8.132 km / 39.868 km 10.385 km / 36.015 km 4.56km/ 18.11km 2.93 km/ 6.67 km
Authorised capacity (Cumecs/Cusecs) 325 Cusecs 325 Cusecs 55.00 Cusecs
Taluk/Dist benifited Hiriyur & sira/ Chitradurga/Tumkur Hiriyur & sira/ Chitradurga /Tumkur Hiriyur & sira/ Chitradurga /Tumkur
Lined/Unlined (km) 15.600 km / 16.00 km 0.600km/ 2.50km
Authorised capacity Cumecs/Cusecs 75 Cusecs 125 Cusecs