Annexure – I. 1
INDIRA SAGAR (POLAVARAM) MULTIPURPOSE PROJECT
A MAJOR IRRIGATION PROJECT
SALIENT FEATURES
2.1 Name of the project : Polavaram Project
2.2 General :
2.21 River Basin :
a. Name : Godavari
b. Located In :
i. State : Andhra Pradesh
ii. States : Andhra Pradesh, Madhya Pradesh
(If inter-State river) Maharashtra, Orissa and Karnataka
iii Countries if
International River : ___
2.2.2 Name of:
a. River :
b. Tributary :
c. State (s) : Andhrapradesh
District (s)
i. Reservoir : East Godavari, West Godavari,
Khammam in AP.
ii. Head works : East and West Godavari Districts.
iii. Command Area
Left Canal : East Godavari and Visakhapatnam
districts
Right Canal : West Godavari and Krishna districts
iv. Power Area : East Godavari district
Mandals :
i. Reservior : Polavaram, Vararamachandrapuram,
Kukunur, Bhurgumpadu, Bhadraachalam,
Kunavaram, Chintoor, Velaripadu, in A.P.
ii. Head workers :
iii. COMMAND AREA :
Left Main Canal : 1. Rajahmundry
2. Korukonda
3. Sithanagaram
4. Rajanagaram
5. Rayanagaram
6. Biccavolu
Annexure – I. 1 contd.
7. Gandepalli
8. Z.Rangampet
9. Jaggampet
10. Kirlampudi
11. Paddapuram
12. Gollaprolu
13. Pithapuram
14. Thondangi
15. Sankhavaram
16. Tuni mandals in East Godavari Districtand
17. Payakaraopet
18. Nakkapalli
19. S.Rayavaram
20. Elamanchili
21. Rambilli
22. Atchutapuram
23. Kasimkota
24. Munagapaka
25. Anakapalli
26. Paravada mandals in Visakhapatnam District.
Right Main Canal : 1. Polavaram
2. Gopalapuram
3. Tallapudi
4. Devarapalli
5. Chagallu
6. Kovvur
7. Nidadavolu
8. Nallajerla
9. Tadepalligudem
10. Ungutur
11. Dwarakatirumala
12. Denduluru
13. Eluru
14. Pedavegi
15. Pedapadu
16. Pentapadu
17. Bhimadole mandals in West Godavari District and
18. Bapulapadu
19. Gangavaram
20. Vijayawada rural & Urban
21. Unguturu
22. Nuzividu mandals in Krishna District.
Annexure – I. 1 contd.
iv. Village near the Head works : Ramayyapet near Polavaram
Location of :
Head works :
Longitude 81° – 46'E
Latitude 17° – 13'N
2.2.3.2. Project area Reference to :
Degree sheets
Index plan
2.2.4. Access to the Project Name : Distance from Project site
Airport : Gannavarm 140 KM
Visakhapatnam 245 KM
Madhurapudi (E.G) 50 KM
Rail Head : Kovvur 36 KM
Rajahmundry 42 KM (by road via Kovvur)
Road Head : Polavaram 3 KM
River Head : Rajahmundry 34 KM
Sea Port : Kakinada 105 KM
Visakhapatnam 250 KM
2.2.5. Estimated life of the Project (Years) 100 Years
2.3 Type of the Project (Irrigation/ Multipurpose
Multipurpose)
2.3.1 Irrigation (Ha) : By flow By lift Total
i. (Left Main Canal) Ha. Ha. Ha.
Gross command area : 1,92,466 23,731 2,16,197
Culturable command area (CCA): 1,53,238 21,740 1,74,978
Area under Irrigation (Breakup) : 1,41,745 20,110, 1,61,855
i. Khariff : 1,15,690 13,810 1,29,500
ii. Rabi : 1,03,200 10,000 1,13,200
iii. Hot weather :
iv. Two Seasonal
v. Perennial : 26,055 6,300 32,355
vi. Gross irrigation (GLA) : 2,74,900
vii. Intensity of Irrigation : 2,74,900 x 100 = 170%
1,61,855
Cost per hectare of Gross area
irrigated (Apportioned cost : Rs. 44,508
for irrigation in left canal)
Cost per 1000 cum of gross/live : Rs. 6,755 per 1000 cum of gross
storage
Annexure – I. 1 contd.
storage (Full cost of Dam) Rs. 17,728 per 1000 cum of live
storage
Cost per 1000 cum of water
delivered at the canal head : Rs.8,113 per 1000 cum.
(Apportioned cost for dam irrigation
in left canal + cost of left canal)
2.3.1. Irrigation (Ha) By flow By lift Total
ii. (Right Main Canal) Ha. Ha. Ha.
a. Gross Command Area 1,53,047 9,644 1,62,691
b. Culturable Command Area(CCA) 1,31,062 8,678 1,39,740
c. Area under irrigation (Breakup) 1,21,232 8,027 1,29,259
i. Khariff 83,171 5,619 88,790
ii. Rabi 60,737 4,013 64,750
iii. Hot weather ----
iv. Two Seasonal ----
v. Perennial 38,061 4,013 64,750
vi Gross Irrigated Area (GLA) Rs. 1,94,010/-
vii Intensity of Irrigation 1,94,010 x 100 = 150%
1,29,259
d. Cost per hectare of Gross area
irrigatied (Apportioned cost Rs. 90,927/-
for Irrigation in Right Canal)
e. Cost per 1000 cum of gross/live Rs.7,415/- per 1000 cum of gross
storage
storage (Full cost of Dam) Rs. 18,042/- per 1000 cum of live
storage
f. Cost per 1000 cum of water
delivered at the canal head Rs. 8,805/- per 1000 cum
(Appointed cost for dam
Irrigation in Right Canal)
Annexure – I. 1 contd.
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2.3.2.
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POWER: |
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a. |
Installed Capacity MWO |
960MW(12x80MW) |
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b. |
Firm Power |
80 MW |
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c. i. |
Seasonal (maximum) power MW |
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ii. |
Peak Power |
650 MW |
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d. |
Annual Energy (M.Kwh) |
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i.
ii.
iii.
iv. |
Firm
Seasonal
Peak
Total |
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e. |
Cost per KW installed |
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f. |
Cost Kwh at the bust bar |
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2.3.3. |
Navigation: |
Deleted |
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2.3.4. |
Water supply |
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2.3.4.1. |
Domestic |
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a. |
Names of towns / Villages served |
Visakhapatnam City,
Anakapalli Muncipality
and 62 villages enroute |
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2.3.4.2. |
Quantum of Water for
Domestic / Industrial use: |
23.44 TM Cft. |
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2.3.5 |
Project performance: |
Period of No. of
Simulation failure |
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a.
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Irrigation |
31 years 7 years
(1950-51 to 1980-81) |
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b. |
Power |
Proposed at 90% dependability |
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c. |
Flood Control |
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d. |
Water Supply |
Proposed at 100% dependabilit; |
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Annexure – I. 1 contd.
e. Navigation
2.4 Hydrology ----
2.4.1. Catchment
2.4.1.1. Catchment are at head work
site (km2)
a. Gross 3,06,643 sq.km
(1,18,446 sq.miles)
b. UN-intercepted (between 2,15,957 sq.km
Pochampadu and Polavaram) (83,417 sq.miles)
2.4.1.2.
a. Rainfed 2,15,957 sq.km (83,417 sq.
miles)
b. Snowfed Nil
Command Area : Rainfall
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2.4.3. |
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SI. No. |
Particular |
Cropping Season |
Annual
(in mm) |
Khariff (June-
Oct)
(in mm) |
Rabi
(Nov-May) (in mm) |
Hot weather (Mar-May) (in mm) |
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a. |
Average Left Main Canal |
1022.95 |
859.05 |
71.45 |
92.45 |
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Right Main Canal |
1055.60 |
910.34 |
63.67 |
81.59 |
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b. |
80% dependable Left Main Canal |
576.55 |
547.45 |
4.70 |
24.40 |
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Right Main Canal |
601.76 |
510.88 |
32.71 |
58.17m |
2.4.4. Climatic Data:
2.4.4.1. Command names of Stations: Kakinada, Rajahmundry
Max Min
a. Air Temperature 36.9 °C 19.1°C
b. Humidity (Percent) 81% 61%
c. Wind (Km/hr) 12 5.6
2.4.5. Proposed utilisation by the As per revised demands worked
out and
poject submitted to CWC during 11/93
Annexure – I. 1 contd.
4. Water supply to Vizag 0.66 TM Cum 23.44
TMC ft
5. Left Canal Irrigation 2.81 TM Cum 99.36
TMC ft
6. Right Canal Irrigation 2.26 TM Cum 79.97
TMC ft
7. Diversion to Krishna 2.40 TM Cum 84.70
TMC ft
Total 8.13 TM Cum 287.47
TMC ft
2.4.6. Flood :
Frequency Magnitude Magnitude
(Years) (Lakh cumecs) (Lakh cumecs)
a. 25 0.636 22.46
b. 50 0.723 25.54
c. 100 0.814 28.74
d. 200 0.898 31.73
e. 500 1.010 35.67
f. 1000 1.094 38.65
2.4.6.1. Design flood (cumecs)
a. Dam 0.102 M.Cumecs
(3.60 M Cusecs)
b. Construction diversion 0.072 M. Cumecs
(25.54 lakh Cusecs)
2.5 Reservior
2.5.1. Water levels (EL.m)
a. Maximum water level (to be +31.00 m (101.70')
maintained during peak flood)
b. Full reservoir level +45.72 m (150')
c. Low water level +41.15 m (135')
d. Dead storage level +41.15 m (135')
2.5.2. Free board (m) For earth dam 7.60m (25')
2.5.3. Live storage (M.cum) 2,129 M.cum (75.20 TMC)
2.5.4. Capacity at (M.cum)
a. Below F.R.L. Nill
b. Between FRL & MWL
Annexure – I. 1 contd.
2.5.6. Sedimentation after Year
50 100
61.73 TMC ft. 78.98 TMC ft.
2.5.7. Assumed annual losses
evaporation from the reservoir
Avg (M.Cum)
a. Quantum 34.92 TMC ft.
b. Depth (m) 2.083 m (82")
2.6. Submerged details :
a. FRL of reservoir 45.72 M (+150')
b. Submergence level considered 45.72 M (+150)
in Andhra Pradesh.
c. Submergence level considered No submersion is allowed
in Orissa and Madhya Pradesh (Natural submersion only)
Area of submergence:
Andhra Pradesh 601.00 sq.km
I. Mandals affected in Andhra Pradesh
1. Polavaram
2. Devipatnam
3. Burgumpadu
4. Bhadrachalam
5. Vara Ramachandra Puram
6. Kukunuru
7. Velairpadu
8. Kunavaram
9. Chintoor
II. Land under submergence :
I. Andhra Pradesh
1. Reserve Forest 3,223 Ha (7,964 Ac)
2. Wet 403 Ha (995 Ac)
3. Dry 22,479 Ha (55,546 Ac)
4. Poramboke 12,081 Ha (29,852 Ac)
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Total: 38,186 Ha (94,357 Ac)
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Annexure – I. 1 contd.
3. Village and Population affected under submergence as per CESS Report:
State No.of No.of Population
Villages Families
Andhra Pradesh 276 27,798 1,17,034
4. Properties affected due to submergence : as per CESS Report:
State Permanent Semipermanent Katcha
Houses Houses Houses
Andhra Pradesh 2,585 158 25,055
2.6.5. Anticipated back water levels at important places along the periphery
of the reservoir.
Name of the Place Back water level
(El-m)
For the spillway Design for the maximum 1. Kunavaram +54.04
flood of 3.6 M cusecs (1 in 500 years) 2. Bhadrachalam +58.32
+140 ft at Polavaram. 3. Kunta +54.08
2.7. Head Works:
2.7.1. Dam:
2.7.1.1. Earth cum Rock fill Dam
a. Type of Dam
(Homogeneus/Zoned/rockfill) Earth cum rockfill Dam
b. Length of the Dam
i. Right Flank 1750+560 = 2,310 M
ii. Left Flank
c. Top width (M) 12.5 M
d. Maximum height above G.L.(M) 48.32 M
i. Right Flank 38 M
ii. Left Flank (above deep bed) 50 M
e. Dyke (s) Saddle dams
i. Number 3
ii. Total length (M) 3160 M
iii. Maximum height (M) 21.5 M
f. Type of cut off and maximum depth (Upstream blanket/open
trench/diaphragm/grout curtain/combination of alternatives.
Plastic concrete twin diaphragm walls – 0.6 m thick 2 m
apart and maximum depth 52 m.
Annexure – I. 1 contd.
2.7.1.3 Spillway (overflow section)
a. Type os spillway Gated spillway with Ogee
(Ogee/Chut/side channel/tunnel/ profile\
syphen/any other type)
b. Full reservoir level (El-m) +45.72 m
c. Maximum water level (El-m)
(Pond level of reservoir at max. +31.00
flood to be maintained)
d. Length (m) between abutments 897.50 m
e. Max height above the deepest +57.90 m
foundation (m)
f. Crest level (El-m) +25.72 m
g. No. of gates 44
h. Type of gates Radial gates
i. Size of gates 16m x 20m
j. Maximum discharging capacity 0.120 M cumes
(Cumecs) at MWL 42.67 m. (36 lakhs cusecs)
k. Flood water level (El-m)
i. Maximum U/S +31.00 m
ii. Minimum D/S 13.64
l. Type ofl energy dissipation arrangement Bucket type & slopping
apron Type
2.7.4. Head Regulator (s) Left Side Right Side
a. Total lenght (m) 60.5 m 85 m
b. Height above deepest 19.5 m 23.50 m
foundation (m)
c. Length of bay (m) 8.00 m 8.00 m
d. Sill levels (El-m) +37.0 m +35.50 m
e. Number of gates 6 nos 8 nos
f. Size of gates 8.0m x 5m 8m x 5.65m
g. No.of silt excluder bays
h. Type of energy dissipation Apron type Apron type
2.8.1. Main canals Left canals Right canals
Total ayacut 1,61,855 Ha. 1,29,259 Ha.
Khariff 1,13,200 Ha. 88,790 Ha.
Rabi 1,13,200 Ha. 64,751 Ha.
Perennial 32,300 Ha. 40,769 Ha.
Annexure – I. 1 contd.
2.8.1. Purpose of canal (Irrigation/ Water supply to Vizag
city and
Power/Navigation/Diversion/ its industrial 23.44 TMC
Water
Supply/Multipurpose Irrgation and diversion
of 80 TMC of water to
Krishna river.
2.8.1.2. Type Left Canal Right Canal
a. Flow/Lift. Flow for 1,41,745 Ha. 1,21,232 Ha.
Lift for 20,110 Ha. 8,027 Ha.
b. Lined/Unlined Lined
c. Discharging capacity of the
Channel above which lining -------
is proposed
d. Type of lining 100 mm M-10
grade cement
concrete.
2.8.1.3. Main Canals data Left Canal Right Canal
a. Lenght (KM) 181.50 KM 174 KM
b. Full supply level at head (El-m) 40.54 m +40.232 m
c. Full supply depth at head (El-m) 4.27 m 5.00 m
d. Bed width at head (m) 51.50 m 68.50 m
f. Bed slope (Range)
i. Left Canal: 1 in 20,000 from KM 0.00 to KM
162.409
1 in 10,000 from KM 162.409 to KM
167.70
1 in 15,000 from KM 167.70 to KM
181.150
ii. Right Canal 1 in 20,000 from KM 0.00 to KM 11.00
1 in 14,000 from KM 11.00 to KM 14.50
1 in 20,000 from KM 14.50 to KM
163.00
1 in 14,000 from KM 163.00 to KM
163.80
1 in 20,000 from KM 163.80 to KM
174.00
g. Maximum discharging Left canal Right canal
Capacity at head (cumecs) 230 cumecs 347 cumecs
Annexure – I. 1 contd.
h. Total No. of canal structures 326 nos. on 152 nos on
on main canal main canal main canal
i. Total assumed losses across
the structure (m) 3.54 m 3.287 m
j. Gross command area (ha) 2,16,197 Ha. 1,67,691 Ha.
k. Culturable command area 1,74,978 Ha. 1,39,740 Ha.
l. Irrigated area 1,61,855 Ha. 1,29,259 Ha.
2.8.1.4. Branch canal (s) Flow canal Lift canal
i. Left canal:
a. Number 101 1
b. Total length 616 --
ii. Right canal:
a. Number 35 4
b. Total length (km) 325 75
2.8.1.5. Total length of distributory system The distributory systme in
up to minimum discharge capacity details is to be
investigated
of 24 cusecs
Note : Similar infromation shall be furnished for all canals, off taking from
head works.
2.8.2. Efficiencies (Percent)
i. Conveyance lossed 35%
ii. Field application losses 35%
2.8 Cropping pattern :
2.9.1. Name of the crop Left canal Right canal
(Season-wise)
1. Paddy: July to Oct 80,943 Ha. 64,750 Ha.
2. Sugarcane: Mar to Feb 32,377 Ha. 32,377 Ha.
3. Chillies: Oct to Nov 48,565 Ha. 32,132 Ha.
4. Pulses on paddy: 80,943 Ha. 64,750 Ha.
Total 1,61,855 Ha. 64,750 Ha.
Annexure – I. 1 contd.
2.10.5. Penstocks:
a. Number 12
b. Diameter (m) 7.5 m
c. Length (M) 360 m
d. Invert level (m) +25.00 m
2.10.6. Power House:
a. Type (surface-underground) Surface
b. Head (m)
i. Maximum 27.95 m
ii. Minimum 20.32 m
iii. Average 22.62 m
c. Dimension (m) 440m x 28m
d. Installed capacity (MW) 960 MW
i. Type Vertical Kaplan
adjustable
blade Reversible trubines
ii. Number
iii. Capacity (hp) 80,500 hp.
2.10.7.
a. Tail Race :
i. Length (m) 1000 m
ii. Bed Width 300 m
b. Water level (El-m)
i. Maximum 28.92 m
ii. Minimum 13.64 m
c. Size of draft gates (m) 24 nos, Size 8.25 MX
9.70 M
2.11. Cost
2.11.1. Cost of the Project (Rs. Lakhs)
(Unit-wise)
Unit – I Head works 3532.91 Crores
Unit – II Power 1750.78 Crores
Unit – III Left Main Canal 1268.26 Crores
Unit – IV Water supply Canal 29.43 Crores
Unit – V Right Main Canal 1613.01 Crores
Total 8194.39 Crores
or say 8194 Crores
Annexure – I. 1 contd.
2.11.2. Allocated cost (Rs. Lakhs)
a. Irrigation Rs. 1,26,826 Lakhs Left canal
Rs. 1,61,301 Lakhs Right canal
b. Power ---------
c. Flood control ---------
d. Navigation ---------
e. Water supply ---------
f. Any other (diversion of 80
TMC of water to Krishna river) Rs. Lakhs.
2.12. Benefits / Revenue Annual Estimated
Quantity Value in
Rs. Lakhs
a. Food production (tonne) 10,19,837 1,53,032
b. Power (Kwh)
c. Flood protection (Ha)
d. Navigation (tonnage)
e. Water supply (population served)
f. Any other fisheries
2.12. Benfit Cost Ratio :
a. B.C. Ratio:
i. Irrigation component 2.89. : 1
ii. Flood control component ---------
iii. Power (returns) ---------
b. Percentage return per annum
On 10th year after completion of project.
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