PRAKASAM BARRAGE

Preamble

The existing Prakasam Barrage across River Krishna was constructed during 1954 to 1957 in place of old Anicut just 104Ft upstream side near Vijayawada City in Krishna District of Andhra Pradesh, below the confluence of the Musi, it passes through a narrow gorge and enters the plains of Coromandal coast, till at Vijayawada. The earlier anicut with its canals for irrigation and flood banks for the protection of the delta from the floods was constructed during 1852 with a coast of Rs. 2.00 crores which was designed by Sir Artur Cotton and built by Captain Charies Orr to serve an ayacut of 5.80 Lakh acres in four districts of Krishna, West Godavari, Guntur and Prakasam. The old anicut was breached during 1952 during inspection the eminent Superintending Engineer, Sri. Vepa Krishna Murthy and other staff have demised their lives. After examining all aspects in detail the present barrage was constructed during 1954-1957 with a cost of Rs. 2.278 Crores and named as Prakasam Barrage after the Great Leader and former Chief Minister Sri. Prakasm Panthulu. The Geographical Location of the Barrage Latitude is 16°-30'N and Longitude is 80°-37'E

Ayacut : Total 13,08,000 Acres in four District Viz. Krishna, West Godavari, Guntur and Prakasam , Krishna District = 6,79,498 Acres
Dependable Net Yield : 101.20 TMC
Water Allocation as per KWDT : 181.20TMC
Designed Maximum Flood Discharge : 11,90,000 Cusecs
Observed Maximum Flood Discharge : 11,10,000 Cusecs during 10/2009
Canals :
Sl.No. Name of Canal Total Length in Km. Lakh Ayacut Acres Design Discharge
1 K.E. Main Canal 1.00 -- 10600
2 Eluru Canal 63.00 0.58 1643
3 Ryves Canal 57.70 1.75 4250
4 Polraj Canal 41.80 0.44 645
5 Campbell Canal 38.10 0.49 705
6 Bantumilli Canal 42.00 0.65 935
7 Bandar Canal 77.80 1.51 3035
8 K.E.B Canal 56.80 1.38 2050
Total 378.20 6.79
Cropping Pattern : Paddy, Sugarcane and Aquaculture
Rehabilitation : Not Applicable
Salient Features Of Prakasam Barrage
Barrage :
Constructed Year : 1957
Latitude : 16°31'N
Longitude : 80°37'E
Length of Barrage : 1232.92 M (4045.00 Ft)
Regulator : 70 Nos of 12.19 M X 3.66 M (40' X 12') each
Scouring sluices
Left Side : 6 Nos of 5.18 M X 3.66 M (17' X 12') each
Right Side : 8 Nos of 5.18 M X 3.66 M (17' X 12') each
Levels :
Floor of Regulator : + 12.21 M (+40.05 Ft)
Floor of Scour Vents : + 11.06 M (+36.30 Ft)
Sill Level of Regulator gates : + 13.73 M (+45.05 Ft)
Top of Regulator gates : + 17.39 M (+57.05 Ft)
Average River Bed Level at Regulator site : + 11.28 M (+37.00 Ft)
Bottom Level of the Floor of Sitanagaram Under sluices : + 8.53 M (+28.00 Ft)
Vijayawada Under Sluices : + 9.69 M (+31.80 Ft)
Bottom of Wells : + 4.88 M (+ 16.00 Ft)
M.F.L. of Barrage (Designed) : + 22.13 M (+72.60 Ft)
Bottom of "T" Beams : + 23.65 M (+ 77.60 Ft)
Top of Road way on Bridge : + 25.02 M (+ 82.10 Ft)
Top of Regulator Hoist Bridge : + 30.36 M (+ 99.06 Ft)
Height of Shutters : 3.66 M (+ 12-0 Ft)
Three rows of cutoff wells of size : 2.13 M X 3.81 M (7 X 12.5 Ft)

Front row of wells 4.88 M (16') deep and other 6.10 M (20') deep. Piers 2.44 M (8') thick for intermediate piers of scour vents 8 Nos of wider piers 4.27 M (14') thick with R.C.C. special staircases inside from floor level to hoist bridge level

Reservoir Area : 30.00 Sq. Km.
M.F.L. Recorded at Anicut Barrage
M.F.L. Record on 07.10.1903 05.10.2009
Level in Front +21.50 M (+70.55 Ft) + 20.97 M (+68.78 Ft)
Level in rear + 20.73 M (+68.00 Ft) + 20.57 M (+67.50 Ft)
Maximum Discharge 33,700 Cumecs (11,90,000 C/S) 31,431 Cumecs (11,10,000 C/S)
Afflux due to interposition 0.66 M (2.16 Ft) ------
(FOR MAJOR & MEDIUM IRRIGATION & HYDRO - POWER PROJECTS)
Additional Details of Dam required for the India - WRIS being jointly developed with ISRO
Name of the Project : Krishna Delta System
Name of the Barrage/ Weir/ Anicut : Prakasam Barrage
Latitude and Longitude of Barrage/ Weir/ Anicut : Latitude - 16° - 30'N Longitude - 80° - 37'E
Storage capacity (in Mcm) : 3.071 TMC
Basin : Krishna
Purpose : Irrigation and water supply
Year of completion : Barrage 1954-57
Length of Barrage/Weir/Anicut : 1233 M
Design flood discharge : 11.90 Lakh Cusecs
Catchment area : 97055 Sq miles
Total annual yield in the catchment : 13.08 Lakh acres
Pond level (m) : 1233 M
Length of Barrage/Weir/Anicut : (+) 12.21 M
Number under sluice /bays : 14 Nos
Number of Barrage/Weir/Bays : 70 Nos
Width of Under sluices/bays : 5.18 X 3.66 M
Width of Barrage/Weir/Bays : 70 Nos 12.19 x 3.66 M
Type and Number of gates : Vertical Type & 70 Nos
Size of gates : 12.19 x 3.66 M
Maximum discharge of Barrage : 33697 Cumecs
Hydraulic Particulars Of K.E. Main Canal & Head Sluice
Main canal
Ayacut : 7, 42, 000 Acres
Discharge at 70 Duty : 10, 600 C/S (300 Cumecs)
Bed Width : 58.00 M
Head Sluice
Existing year of construction : 1905
Sill Level : + 12.36 M
F.S.L. (Front) : 17.39 M
F.S.L. (Rear) : 16.93 M
Head F.S.L : 0.46 M
No. of Vents and Size : 6 Nos - 6.1 M X 3.35 M
Details of Lock Chamber
Lock Chamber Length : 45.72 M (150 Ft)
Width : 4.75 M (15.6 Ft)
Sill Level of Lock Chamber : 12.36 M
Prakasam Barrage
Maximum flood discharge : 11.90 Lakh Cusecs
River M.F.L. (1903) 11.90 Lakh Cusecs : + 21.50 M
River M.F.L. (2009) : + 20.97 M
U/S Sheet pile Cut off bottom (Barrage) : + 3.048 M (+ 10.00 Ft)
Bottom of Cutoff wells (Barrage) : + 4.87 M (+ 16.00)
Prakasam Barrage Road Level : + 25.02 M
N.H. Road Level : + 25.28 M

KRISHNA WESTERN DELTA

Preamble

The Prakasam barriage (i.e., Krishna Delta System) was constructed across River Krishna to serve an ayacut of 13.09 lakh acres in Krishna, West Godavari, Guntur and Prakasam districts. The Krishna Western Main canal takes off from Right Bank of Krishna River near Seethanagaram U/s of Prakasam Barriage in Guntur District and serves the ayacut located in Guntur & Prakasam Districts.

Salient features
Location : The Krishna Western Main Canal takes off from Right Bank of Krishna River near Seethanagaram at Prakasam Barrage in Guntur district.
Ayacut : Guntur district : 4,99,231 Acres
Mandals Benefited : 24 - Mangalagiri, Pedakakani, Pedanandipadu, Prathipadu, kakumanu, Duggirala, Kollipara, Tenali, Kolluru, Vemuru, Bhattiprolu, Repalle, Nizampatnam, cherukupalli, Nagaram, Ponnuru, Bapatla, Chebrolu, Pittalavanipalem, Vatticherukuru, Tsunduru, Amruthaluru, Karlapalem, Tadepalli.

The following are the main canals in K.W.Delta

Sl.No Name of the Canal Length in Kms Ayacut in acres
1 K.W. Main Canal 20.800 22,172
2 K.W.Bank Canal 74.710 1,55,344
3 High Level channel 2.420 26,414
4 Commamuru Canal(Guntur dt) 91.650 1,91,597
5 East Side Channel 38.000 53,992
6 West Side channel 38.321 27,588
7 Nizampatnam canal 45.063 22,124
Cropping Pattern : Paddy
Villages Benefited : 240

Drainage Basins:-

The following are the Major Basins in Krishna Western Delta System

Sl.No. Name of the Basin Length in Kms Catchment Area in Sq.Miles
1 Bhattiprolu Main basin 60.05 285.50
2 Repalle Main Basin 74.55 250.53
3 Thunghabadra Basin 110.25 916.61
4 Krihna River Basin 9.81 18.10
5 Kollimerla Basin 90.60 238.80
6 Romperu Basin 148.89 1642.70
All the drains are flowing from West to East crossing the above canal system.
Mandal Wise Ayacut Particulars In Respect Of Krishna Western Delta
S.No. Name of the Mandal Registered Ayacut in Acres. Irrigated Ayacut in acres during Khariff 2014-15.
1. Amarthalur 29349 29349
2. Bapatla 41680 41680
3. Bhattiprolu 18746 18746
4. Chebrolu 14448 14448
5. Cherukupalli 18636 18636
6. Duggirala 27373 27373
7. Kakumanu 30822 30822
8. Karlapalem 18536 18536
9. Kollipara 24462 24462
10. Kolluru 17563 17563
11. Nagaram 37663 37663
12. Nizampatnam 29679 29679
13. Ponnuru 32706 32706
14. Pittalavanipalem 13404 13404
15. Repalle 41720 41720
16. Tenali 26284 26284
17. Tsunduru 23119 23119
18. Vemuru 24946 24946
19. Mangalagiri 5292 5292
20. Pedakakani 11272 11272
21. Pedanandipadu 299 299
22. Prathipadu 1133 1133
23. Tadepalli 1717 1717
24. Vatticherukuru 8382 8382
Total 499231 499231