Wednesday, February 9, 2011

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:

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   
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
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)













1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Station
No. Trail
Elv. BL
depth,m
Elv.stage
Width
Area
Discharge
Velocity
Vel.Head
Total H
R
Sf term1
Sf term2
Sf
ALMATTI
0
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
1
491
30
521
1500
45000
80000
1.777778
0.161085
521.1611
28.84615
16000000
1.7715E+11
9.03188E-05
A to NH218-2
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
3
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
1
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
2
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
3
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
1
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
2
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
3
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
4
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
1
508
24.8
532.8
1500
37200
80000
2.150538
0.235719
533.0357
24.0062
16000000
94823484753
0.000168735
Al to Hippargi
2
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
3
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
4
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
1
513
25.16
538.16
1500
37740
80000
2.119767
0.229022
538.389
24.34336
16000000
99423699279
0.000160927
Hi to Halyal
2
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
3
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
4
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
1
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
2
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
3
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
4
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
5
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
6
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
7
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
1
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
2
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
3
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
1
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
2
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
3
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
4
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
5
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
6
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
7
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
1
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
2
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
3
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
1
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
2
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
3
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
1
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
2
528
28.91274
556.9127
1500
43369.11
80000
1.844631
0.173428
557.0862
27.83952
16000000
1.5695E+11
0.000101943
Sangli
3
528
32.23894
560.2389
1500
48358.41
80000
1.654314
0.139488
560.3784
30.91026
16000000
2.24275E+11
7.1341E-05

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Born in 1932 at Mudinepalli, near Gudivada, Krishna Dist. Andhra Pradesh, received Bachelors degree in Civil Engg., from Viswesaraiah Engineering College, Banglore (1956) and Masters Degree in Environmental Engineering from Rice university, Houston, Texas, (USA) (1962), Ph.D (Hony). Former Head of the Department of Civil Engineering and principal of College of Engineering, Andhra university.Formerly Hony.Professor in Andhra University,Manonmanian Sundarnar University,JNT University. Fellow of the Institution of Engineers,India Recipient of the University Grants Commissions National Award "Swami Pranavananda Award on Ecology and Environmental Sciences" for the year 1991. Recipient of Sivananda Eminent Citizen Award for 2002 by Sanathana Dharma Charitable Trust, Andhra Pradesh state. Presently Working as Director, centre for Environmental Studies, GITAM University, http://www.geocities.com/prof_shivajirao/resume.html http://www.eoearth.org/contributor/Shivaji.rao