shivajirao: ALAMATTI BACK WATER CURVE AT 524.26METERS

ALAMATTI DAM BACK WATER CURVE CALCULATIONS

Prof.T.Shivaji Rao,

Director,Center for environmental studies,

Gitam University, Visakhapatnam

Prof.M.Ramesh,

Head of the Department of Civil Engineering,

Gitam University,Visakhapatnam,

To understand basics of backwater curves caused by dams across the rivers see the following website:

http://bhujangam.blogspot.com/2011/02/back-water-afflux-theory.html

Satara,sangli and Kolhapur Districts are bound to get flooded by increased Alamatti Dam. Why?

In Satara District,Sahyadari range is having a height over 4500 feet above mean sea level to the subdued basin of Nira river in Phaltan tahasil, with an average height of about 1700 feet above mean sea level.If Alamatti foundation is at about 490 megters and if the Full Resrvoir Level is at 524.26 meters [1730 feet]
and the back water levels as per computer model calculations show that sangli will be under flood level of about 560 meters[1848 feet] above mean sea level will not the children and youth of West maharashtra region ask their elected leaders and parents what sinthey have committed for being forced to get drowned under freequent flood disasters to prevent their parents and politicians to refuse to stop this man-mde killing of millions of people,cattle populations and lakhs of agricultural farmers and farm workers for no fault of theirs? why do the politicians of Maharashtra not debate on this issue and act,if they find it wrong to permit their Mumbai-based decision-makers collude with karnataka bosses and ruin Sangli region?]
http://www.indianetzone.com/46/geography_satara_district.htm

WHY KARNATAKA STATE IS HELPLESS IN PREVENTING FLOODING OF SANGLI DISTRICT

Irrigation experts told Frontline that both States, especially Maharashtra (by virtue of being the upper riparian), probably stored waters in their dams far in excess of the necessary storage level before the onset of the monsoon. They probably did not wait to build up storage levels slowly as the monsoon progressed fearing the level would come down if the monsoon failed. But with excess rains in the catchment areas in Maharashtra, the States were forced to release water from their dams, which had reached their full reservoir levels (FRLs) thereby aggravating the flood situation.

Even as the people are reeling under the impact of the floods, Maharashtra and Karnataka indulged in a dispute over the release of the Krishna waters. Maharashtra has accused Karnataka of not fulfilling its obligation to release adequate quantities of the Krishna waters from the Almatti dam so that the flood situation and the backwater effect in its inundated southern districts could be brought under control. It even got Prime Minister Manmohan Singh to intervene in the matter.

Karnataka has refused to release 6 lakh cusecs of water from the Almatti dam that Maharashtra has been demanding. On August 5, Karnataka released 4.20 lakh cu against an inflow of 3.57 lakh cu, reducing the water level in the dam to 516.4 metres, as against the FRL of 519.6 m.

Karnataka Chief Minster N. Dharam Singh said the release of 6 lakh cu would inundate 600 villages in Karnataka. But with Maharashtra increasing the outflow from its upstream Koyna dam (3.96 lakh cu was released on August 6) steadily, Karnataka, according to engineers at the Almatti dam site, will also have to increase gradually the outflow to 5 lakh cu. The water discharges from the Almatti dam have already affected over 60 villages in Hungund and Muddebihal taluks of Bagalkot and Bijapur districts.

According to the Water Resources Minister M. Mallikarjun Kharge, Maharashtra was needlessly creating a controversy over the discharge of water from Almatti. His contention is that the villages in Sangli and Kolhapur could not have been affected by the backwaters of the Almatti as they are located at a height of 538 metres above sea level. After all, floods had ravaged villages in both districts in 1964 and 1976, before the dam was constructed. He also claimed that in 2002-03 and 2004, when the dam had reached full storage level, no village in Maharashtra was submerged. Irrigation experts also point out that a joint survey by engineers from both States, which was later cleared by the Central Water Commission (CWC), stated that villages upstream up to and beyond Sangli would not be flooded even when the water level at the Almatti dam reached 524.256 m..See the following article on "DEVASTATION AND DISPUTE" in FRONTLINE MAGAZINE,Chennai

.http://www.hinduonnet.com/fline/fl2217/stories/20050826006413100.htm

KARNATATAKA MINISTER,KHARGE IS MISLEADING ON FLOODING OF SANGLI, KOLHAPUR AND SATARA REGIONS

The variation in relief ranges from the pinnacles and high plateaus of the main Sahyadari range having a height over 4500 feet above mean sea level to the subdued basin of the Nira river in Phaltan tahasil, with an average height of about 1700 feet above mean sea level.

http://www.indianetzone.com/46/geography_satara_district.htm
http://tshivajirao.blogspot.com/2011/01/almathi-dam-hazardous.html
https://sites.google.com/site/ayyagaribhujangarao/backwateraffluxtheory

Roughness Coefficients (Manning’s “n”) for Overland Flow

http://www.shippensburgtownship.com/2010-01/media/development/Table%20B-4.pdf

Surface Description	n
Dense Growth	0.4 - 0.5
Pasture	0.3 - 0.4
Lawns	0.2 - 0.3
Bluegrass Sod	0.2 - 0.5
Short Grass Prairie	0.1 - 0.2
Sparse Vegetation	0.05 - 0.1
Bare Clay-Loam Soil (eroded)	0.01 - 0.0
Concrete/Asphalt - very shallow depths (less than ¼ inch) - small depths (1/4 inch to several inches)	0.10 - 0.1 0.05 - 0.1
Roughness Coefficients (Manning’s “n”) for Channel and Pipe Flow
Reach Description	n
Natural stream, clean, straight, no rifts or pools	0.03
Natural stream, clean, winding, some pools or shoals	0.04
Natural stream, winding, pools, shoals, stoney with some weeds	0.05
Natural stream, sluggish deep pools and weeds	0.07
Natural stream or swale, very weedy or with timber underbrush	0.10
Concrete pipe, culvert or channel	0.013
Corrugated metal pipe	0.012 – 0.024*
Spiral rib metal pipe	0.012
Corrugated polyethylene pipe	0.020
Smooth-lined corrugated polyethylene pipe	0.012

* Based on pipe diameter and manufacturer’s design specifications

DISTANCES OF VARIOUS STATIONS ALONG KRISHNA RIVER FROM ALAMATTI TO SANGLI (Approximate values as per Tourist Maps and Google Earth)

Station	Distance (in Km)	Cumulative Distance (in Km)
Alamatti dam	0	0
National Highway 218	24	24
NH 218 to Reservoir Approach	24	48
Res Appr to Algor	40	88
Algor to Hippargi	28	116
Hippargi to Halyal-Darur	25	141
Halyal to Kuduchi	26	167
Kuduchi to Diggarwadi	13	180
Diggarwadi to Shahapur (Jugal)	25	205
Shahapur to Narsobawadi	10	215
Narsobavadi to Ankali	25	240
Ankali to Sangli	10	250

ALMATTI Back water profile Calculations08-02-2011 (for n=0.05, 80,000 cumecs,524.26 m stage near Alamatti dam widths 1500 m)

Station

No. Trail

Elv. BL

depth,m

Elv.stage

Width

Area

Discharge

Velocity

Vel.Head

Total H

Sf term1

Sf term2

ALMATTI

489

35.26

524.26

1500

52890

80000

1.512573

0.116609

524.3766

33.67674

16000000

3.00674E+11

5.32137E-05

A to NH218-1

491

521

1500

45000

80000

1.777778

0.161085

521.1611

28.84615

16000000

1.7715E+11

9.03188E-05

A to NH218-2

491

35.03135

526.0313

1500

52547.02

80000

1.522446

0.118137

526.1495

33.4681

16000000

2.94344E+11

5.43581E-05

NH218

491

35.27947

526.2795

1500

52919.2

80000

1.511739

0.116481

526.3959

33.6945

16000000

3.01217E+11

5.31178E-05

N to Res Approach

494

32.39

526.39

1500

48585

80000

1.646599

0.13819

526.5282

31.04909

16000000

2.27735E+11

7.02571E-05

N to Res Approach

494

34.67812

528.6781

1500

52017.18

80000

1.537953

0.120556

528.7987

33.14555

16000000

2.84747E+11

5.61902E-05

A Res approach

494

34.73009

528.7301

1500

52095.14

80000

1.535652

0.120195

528.8503

33.19303

16000000

2.86145E+11

5.59156E-05

Res App to Algur

498

30.85

528.85

1500

46275

80000

1.728795

0.152331

529.0023

29.63117

16000000

1.94142E+11

8.2414E-05

Res App to Algur

498

31.76333

529.7633

1500

47644.99

80000

1.679085

0.143697

529.907

30.47277

16000000

2.13618E+11

7.49001E-05

Res App to Algur

498

34.57856

532.5786

1500

51867.83

80000

1.542382

0.121251

532.6998

33.05458

16000000

2.82081E+11

5.67212E-05

Algur

498

34.67976

532.6798

1500

52019.64

80000

1.537881

0.120544

532.8003

33.14705

16000000

2.84791E+11

5.61815E-05

Al to Hippargi

508

24.8

532.8

1500

37200

80000

2.150538

0.235719

533.0357

24.0062

16000000

94823484753

0.000168735

Al to Hippargi

508

25.51788

533.5179

1500

38276.82

80000

2.090038

0.222643

533.7405

24.67823

16000000

1.04148E+11

0.000153628

Al to Hippargi

508

29.63343

537.6334

1500

44450.15

80000

1.799769

0.165095

537.7985

28.50708

16000000

1.70151E+11

9.40343E-05

Hippargi

508

30.00737

538.0074

1500

45011.05

80000

1.777341

0.161006

538.1684

28.85297

16000000

1.77293E+11

9.02461E-05

Hi to Halyal

513

25.16

538.16

1500

37740

80000

2.119767

0.229022

538.389

24.34336

16000000

99423699279

0.000160927

Hi to Halyal

513

26.03124

539.0312

1500

39046.86

80000

2.04882

0.213948

539.2452

25.15805

16000000

1.11192E+11

0.000143896

Hi to Halyal

513

29.87518

542.8752

1500

44812.77

80000

1.785205

0.162434

543.0376

28.73073

16000000

1.74745E+11

9.1562E-05

Halyal

513

30.17786

543.1779

1500

45266.79

80000

1.7673

0.159192

543.3371

29.01056

16000000

1.80617E+11

8.85851E-05

Ha to Kudichi

514

29.33

543.33

1500

43995

80000

1.818388

0.168529

543.4985

28.22617

16000000

1.64503E+11

9.72627E-05

Ha to Kudichi

514

29.45121

543.4512

1500

44176.82

80000

1.810904

0.167144

543.6184

28.33841

16000000

1.66743E+11

9.59559E-05

Ha to Kudichi

514

32.60667

546.6067

1500

48910

80000

1.635657

0.13636

546.743

31.24814

16000000

2.32762E+11

6.87398E-05

Ha to Kudichi

514

32.73312

546.7331

1500

49099.68

80000

1.629339

0.135308

546.8684

31.36425

16000000

2.3573E+11

6.78741E-05

Ha to Kudichi

514

32.81601

546.816

1500

49224.01

80000

1.625223

0.134625

546.9506

31.44034

16000000

2.37691E+11

6.73144E-05

Ha to Kudichi

514

35.08799

549.088

1500

52631.99

80000

1.519988

0.117756

549.2057

33.5198

16000000

2.95904E+11

5.40716E-05

Kudichi

514

35.22962

549.2296

1500

52844.42

80000

1.513878

0.116811

549.3464

33.64903

16000000

2.99828E+11

5.3364E-05

Ku to Diggerwadi

515

34.2

549.2

1500

51300

80000

1.559454

0.12395

549.3239

32.70849

16000000

2.72103E+11

5.88013E-05

Ku to Diggerwadi

515

30.53536

545.5354

1500

45803.03

80000

1.746609

0.155486

545.6908

29.34078

16000000

1.87727E+11

8.52303E-05

Old Diggerwadi

515

35.57951

550.5795

1500

53369.26

80000

1.49899

0.114525

550.694

33.96808

16000000

3.09675E+11

5.1667E-05

Odigg to Shaharpur

518

32.69

550.69

1500

49035

80000

1.631488

0.135665

550.8257

31.32466

16000000

2.34715E+11

6.81677E-05

Odigg to Shaharpur

518

31.24489

549.2449

1500

46867.34

80000

1.706946

0.148505

549.3934

29.99529

16000000

2.02405E+11

7.90494E-05

Odigg to Shaharpur

518

34.81143

552.8114

1500

52217.15

80000

1.532064

0.119634

552.9311

33.26732

16000000

2.88343E+11

5.54894E-05

Odigg to Shaharpur

518

34.91626

552.9163

1500

52374.39

80000

1.527464

0.118917

553.0352

33.36304

16000000

2.91193E+11

5.49463E-05

Odigg to Shaharpur

518

33.77744

551.7774

1500

50666.15

80000

1.578963

0.127071

551.9045

32.32177

16000000

2.61255E+11

6.12429E-05

Odigg to Shaharpur

518

36.61264

554.6126

1500

54918.95

80000

1.456692

0.108152

554.7208

34.90851

16000000

3.4005E+11

4.70519E-05

Shaharpur

518

35.79881

553.7988

1500

53698.21

80000

1.489808

0.113126

553.9119

34.16791

16000000

3.1596E+11

5.06393E-05

Shr to Narsobawadi

520

33.92

553.92

1500

50880

80000

1.572327

0.126005

554.046

32.45229

16000000

2.64881E+11

6.04045E-05

Shr to Narsobawadi

520

34.88897

554.889

1500

52333.46

80000

1.528659

0.119103

555.0081

33.33813

16000000

2.90449E+11

5.5087E-05

Narsobawadi

520

35.12547

555.1255

1500

52688.2

80000

1.518366

0.117504

555.243

33.554

16000000

2.96939E+11

5.38832E-05

Nar to Ankali

525

30.24

555.24

1500

45360

80000

1.763668

0.158539

555.3985

29.06798

16000000

1.81839E+11

8.79898E-05

Nar to Ankali

525

31.7523

556.7523

1500

47628.46

80000

1.679668

0.143796

556.8961

30.46263

16000000

2.13375E+11

7.49853E-05

Ankali

525

33.78283

558.7828

1500

50674.25

80000

1.578711

0.12703

558.9099

32.32672

16000000

2.61392E+11

6.12108E-05

Ank to Sangli

528

30.91

558.91

1500

46365

80000

1.725439

0.15174

559.0617

29.68652

16000000

1.95382E+11

8.18909E-05

Ank to Sangli

528

28.91274

556.9127

1500

43369.11

80000

1.844631

0.173428

557.0862

27.83952

16000000

1.5695E+11

0.000101943

Sangli

528

32.23894

560.2389

1500

48358.41

80000

1.654314

0.139488

560.3784

30.91026

16000000

2.24275E+11

7.1341E-05

shivajirao

Wednesday, February 9, 2011

ALAMATTI BACK WATER CURVE AT 524.26METERS

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