ALAMATTI DAM BACK WATER CURVE CALCULATIONS
Basics of Back water curve for rivers see the following website:
http://evidence.environment-agency.gov.uk/FCERM/en/FluvialDesignGuide/Chapter7.aspx?pagenum=4
TOUGH TASK FOR LAND AQISITION FOR INCREASED HEIGHT OF ALAMATTI DAM
http://timesofindia.indiatimes.com/city/bangalore/Tribunal-award-govt-has-tough-task-at-hand/articleshow/7198496.cms
http://www.indianetzone.com/46/geography_satara_district.htm
http://www.wseas.us/e-library/transactions/fluid/2010/42-581.pdf [SURAT in floods]
TO LEARN BASICS ABOUT BACK WATER CURVE CALCULATIONS ,see following web site:
http://onlinemanuals.txdot.gov/txdotmanuals/hyd/hyd.pdf
Please study the pages in Chapters 6 and 7 of this Manual available online from Texas Government,USA
and also the sketches and Diagrams furnished on this web site by the authors
http://tshivajirao.blogspot.com/2011/01/almathi-dam-hazardous.html
https://sites.google.com/site/ayyagaribhujangarao/backwateraffluxtheory
Chief Minister
To: Industry Secretary/IE&LD/Mantralaya/Maharashtra@Maharashtra
02/15/2011 03:45 cc:
PM Subject: Avoid Flood havoc of hundreds of Telangana villagesdue to dam
break consequent to rising the height of Alamatti dam to 524.5m
Sir,
Forwarding you a letter received by Hon.CM for necessary action
PRO to CM
----- Forwarded by Chief Minister/Ministers/Maharashtra on 02/15/201104:05 PM -----
------------------------------------------------------------------------------------------------------------------------------------------
1. E-mail letter from Prof.T.Shivaji Rao, to the Chief Minister of Maharashtra on "Avoiding Flood havoc due to Alamatti dam"
shivaji Rao
,
"CM,maharashtra"mail.com>, Jayant
min_rdd@maharashtra.gov.in>, RRpatil, , drsd
cc:, ,
,PM Rameshkumar , Maharashtra, "prasad,BBS" ,
02/12/2011 05:35
Subject: Avoid Flood havoc of hundreds of Telangana villagesdue to dambreak
consequent to rising the height of Alamatti dam to 524.5m
DATA USED BY INDEPENDENT EXPERTS FOR CALCULATING BACK WATER LEVELS FOR ALAMATTI DAM
Basics of Back water curve for rivers see the following website:
http://evidence.environment-agency.gov.uk/FCERM/en/FluvialDesignGuide/Chapter7.aspx?pagenum=4
TOUGH TASK FOR LAND AQISITION FOR INCREASED HEIGHT OF ALAMATTI DAM
http://timesofindia.indiatimes.com/city/bangalore/Tribunal-award-govt-has-tough-task-at-hand/articleshow/7198496.cms
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. http://www.indianetzone.com/46/geography_satara_district.htm
http://www.wseas.us/e-library/transactions/fluid/2010/42-581.pdf [SURAT in floods]
TO LEARN BASICS ABOUT BACK WATER CURVE CALCULATIONS ,see following web site:
http://onlinemanuals.txdot.gov/txdotmanuals/hyd/hyd.pdf
Please study the pages in Chapters 6 and 7 of this Manual available online from Texas Government,USA
and also the sketches and Diagrams furnished on this web site by the authors
WHY CWC IS NOT GIVING DATA ON ALAMATTI BACK WATER CURVE AND DAMBRERAK ANALYSIS?
see website:http://www.asianage.com/india/cwc-cic-draw-swords-over-info-979No guidelines on studying backwater impact of dams: CWC
New Delhi, Feb 15 (PTI) The Central Water Commission has said it has no "principles or guidelines" for conducting study on the assessment of backwater flooding of dams and hydroelectric projects in the country.
Responding to the query of an RTI applicant who sought to know from the Commission the basis on which such studies are done in the country, the Commission said no such principles or guidelines are available with them.
It said the Commission''s role is confined to the computation of backwater levels for specified projects for their given flood water maps.
Backwater studies are important because they bring out possible impact of reservoir on the areas close to upstream which may be flooded because of the construction.
The Commission also refused to share the data about the impact of the controversial Almatti reservoir on the backwater area which was overruled by the Central Information Commission. The transparency panel held that larger public interest would be served in the disclosure of the data and hence it should be provided to the applicant.
In addition to seeking details of principles and guidelines governing the backwater studies, applicant Swarup Bhattacharya had also sought from the CWC a copy of the backwater impact study on the Almatti Dam.
The CWC refused to share information saying it is a commercial document, hence exempted from disclosure under the Right to Information Act.
During the appeal before the CIC, the CWC said since the study was done by them for the Karnataka Government based on data provided by them, the information cannot be disclosed.
"The Commission is also of the view that the sought information is now held by the CWC, since it is a part of the study conducted by the CWC. The data has now become a part of the report of the CWC since it is part of the study...
irrespective of who had supplied it," Information Commissioner Sushma Singh held.
She said the disclosure of the information was in public interest and it should be disclosed.
In a ruling in December last year, the Krishna Water Disputes Tribunal (KWDT) had allowed Karnataka, where the dam is being built, to increase the height of reservoir by five metres.
The increase in dam height has sparked concerns as people living in the 320 villages of backwater area of Kolhapur and Sangli district of Maharashtra feared that there it will result in flooding in their area.
Maharashtrra CM offers Karnataka talks to end Dispute on Alamatti Dam and also Belgaum row :
TIMES NEWS NETWORK
Belgaum:15,Feb.2011: Maharashtra chief minister Prithviraj Chavan on Sunday [13-2-2011]offered to hold bilateral talks with Karnataka to resolve the 61-year-old Belgaum border dispute involving the two states
He also said hed seek a review of the recent Krishna Water Disputes Tribunals verdict that allows
Karnataka to raise the height of the Almatti dam from 519 metre to 524.6 metre.Chavan said,
There is no need to increase the dam height if we manage the water scientifically, he said.
He said raising the height is a great threat to villages in the catchment area in Maharashtra.
Responding to the query of an RTI applicant who sought to know from the Commission the basis on which such studies are done in the country, the Commission said no such principles or guidelines are available with them.
It said the Commission''s role is confined to the computation of backwater levels for specified projects for their given flood water maps.
Backwater studies are important because they bring out possible impact of reservoir on the areas close to upstream which may be flooded because of the construction.
The Commission also refused to share the data about the impact of the controversial Almatti reservoir on the backwater area which was overruled by the Central Information Commission. The transparency panel held that larger public interest would be served in the disclosure of the data and hence it should be provided to the applicant.
In addition to seeking details of principles and guidelines governing the backwater studies, applicant Swarup Bhattacharya had also sought from the CWC a copy of the backwater impact study on the Almatti Dam.
The CWC refused to share information saying it is a commercial document, hence exempted from disclosure under the Right to Information Act.
During the appeal before the CIC, the CWC said since the study was done by them for the Karnataka Government based on data provided by them, the information cannot be disclosed.
"The Commission is also of the view that the sought information is now held by the CWC, since it is a part of the study conducted by the CWC. The data has now become a part of the report of the CWC since it is part of the study...
irrespective of who had supplied it," Information Commissioner Sushma Singh held.
She said the disclosure of the information was in public interest and it should be disclosed.
In a ruling in December last year, the Krishna Water Disputes Tribunal (KWDT) had allowed Karnataka, where the dam is being built, to increase the height of reservoir by five metres.
The increase in dam height has sparked concerns as people living in the 320 villages of backwater area of Kolhapur and Sangli district of Maharashtra feared that there it will result in flooding in their area.
Maharashtrra CM offers Karnataka talks to end Dispute on Alamatti Dam and also Belgaum row :
TIMES NEWS NETWORK
Belgaum:15,Feb.2011: Maharashtra chief minister Prithviraj Chavan on Sunday [13-2-2011]offered to hold bilateral talks with Karnataka to resolve the 61-year-old Belgaum border dispute involving the two states
He also said hed seek a review of the recent Krishna Water Disputes Tribunals verdict that allows
Karnataka to raise the height of the Almatti dam from 519 metre to 524.6 metre.Chavan said,
There is no need to increase the dam height if we manage the water scientifically, he said.
He said raising the height is a great threat to villages in the catchment area in Maharashtra.
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.htmhttp://tshivajirao.blogspot.com/2011/01/almathi-dam-hazardous.html
https://sites.google.com/site/ayyagaribhujangarao/backwateraffluxtheory
7) E-mail letter sent to Prof.T.Shivaji Rao by the Secretary for Industry, Government of Maharashtra on 22-2-2011 as an acknowledgement
Subject: Avoid Flood havoc of hundreds of Telangana villagesdue to dam break consequent to rising the height of Alamatti dam to 524.5m
To: shivajirao32@hotmail.com
From: sec_industry@maharashtra.gov.in
Date: Tue, 22 Feb 2011 21:33:59 -1200
----- Forwarded by Industry Secretary/IE&LD/Mantralaya/Maharashtra on 02/22/2011 09:37 PM ---
------------------------------------------------------------------------------------------------------------------------------------------6) Prof.T.Shivaji Rao's letter on dam break possibility due to increasisng the height of Alamatti dam was referred to Secretary for Irrigation of Mahrasthra for necessary action
Industry Secretary To: sec_irr@maharashtra.gov.in
cc: Chief Minister/Ministers/Maharashtra@Maharashtra
02/22/2011 09:32 Subject: Avoid Flood havoc of hundreds of Telangana villagesdue to dam break
PM consequent to rising the height of Alamatti dam to 524.5m
Email dated 18/2/2011 from Shri Shivaji Rao received through PRO to CM is
forwarded herewith for necessary action.
-A.M.Khan P.S.(Ind)
----- Forwarded by Industry Secretary/IE&LD/Mantralaya/Maharashtra on 02/22/2011 09:34 PM ---
------------------------------------------------------------------------------------------------------------------------------------------
5. Another E-mail sent by Prof.T.shivaji rao to the Chief Minister of Maharashtra on dam break analysis of Alamatti dam and this letter was forwarded by the Chief Minister to the Secretary for Industries, Government of Maharashtra for necessary action
Chief Minister
To: Industry Secretary/IE&LD/Mantralaya/Maharashtra@Maharashtra
02/22/2011 12:30 cc:
AM Subject: Avoid Flood havoc of hundreds of Telangana villagesdue to dam break
consequent to rising the height of Alamatti dam to 524.5m
Sir,
Forwarding you a letter received by Hon.CM for necessary action
PRO to CM
----- Forwarded by Chief Minister/Ministers/Maharashtra on 02/22/2011 06:21 PM -----
------------------------------------------------------------------------------------------------------------------------------------------
Subject: Avoid Flood havoc of hundreds of Telangana villagesdue to dam break consequent to rising the height of Alamatti dam to 524.5m
To: shivajirao32@hotmail.com
From: sec_industry@maharashtra.gov.in
Date: Tue, 22 Feb 2011 21:33:59 -1200
----- Forwarded by Industry Secretary/IE&LD/Mantralaya/Maharashtra on 02/22/2011 09:37 PM ---
------------------------------------------------------------------------------------------------------------------------------------------6) Prof.T.Shivaji Rao's letter on dam break possibility due to increasisng the height of Alamatti dam was referred to Secretary for Irrigation of Mahrasthra for necessary action
Industry Secretary To: sec_irr@maharashtra.gov.in
cc: Chief Minister/Ministers/Maharashtra@Maharashtra
02/22/2011 09:32 Subject: Avoid Flood havoc of hundreds of Telangana villagesdue to dam break
PM consequent to rising the height of Alamatti dam to 524.5m
Email dated 18/2/2011 from Shri Shivaji Rao received through PRO to CM is
forwarded herewith for necessary action.
-A.M.Khan P.S.(Ind)
----- Forwarded by Industry Secretary/IE&LD/Mantralaya/Maharashtra on 02/22/2011 09:34 PM ---
------------------------------------------------------------------------------------------------------------------------------------------
5. Another E-mail sent by Prof.T.shivaji rao to the Chief Minister of Maharashtra on dam break analysis of Alamatti dam and this letter was forwarded by the Chief Minister to the Secretary for Industries, Government of Maharashtra for necessary action
Chief Minister
To: Industry Secretary/IE&LD/Mantralaya/Maharashtra@Maharashtra
02/22/2011 12:30 cc:
AM Subject: Avoid Flood havoc of hundreds of Telangana villagesdue to dam break
consequent to rising the height of Alamatti dam to 524.5m
Sir,
Forwarding you a letter received by Hon.CM for necessary action
PRO to CM
----- Forwarded by Chief Minister/Ministers/Maharashtra on 02/22/2011 06:21 PM -----
------------------------------------------------------------------------------------------------------------------------------------------
4. Another e-mail letter to Secretary for industries, Governsment of Maharashtra by Prof.t.Shivaji Rao who quoted the news item published in Asia age on the subject of non-supply of reports made by central Water Commission on backwater levels impact on Maharashtra villages likely to be submerged due to increase in the height of the Alamatti dam.
shivaji Rao, Pattena
mail.com>, pattenna , Shivaji
Rao, "CM,maharashtra"
02/18/2011 08:20 cc:, Jayant ,
PM "Cm,AP"
Subject: Avoid Flood havoc of hundreds of Telangana villagesdue to dam break
consequent to rising the height of Alamatti dam to 524.5m
To,
The principal secretary for Industries, Government of Maharashtra, MUMBAI.
Sir,
SUBJECT:Improper decision by Brijesh kumar Tribunal on incresing the Height of Alamatti Dam due to insufficient scxientific and technical reports supplied by all state Governments on Back water curves and Dam break analysis and copiexs of the same as computed wdere sent to you. But to-day,the News paper ":ASIAN AGE "has published a good News item that under RTI act,CWC is ordered to supply these reports on Baxck water Curves and DamBreak Analysis as made by Central water commission and unless we examine these reports,we cannot say whether they are based on proper scientific data to afrrive at proper conclusions.In the absence of these crucial rweports,the senior Advocates employed by Maharashtra would not have bveen in a position to establish the injury likely to occur to millions of people in West maharashtra due to back water afflux and to millions of farmers in karnataka and andhra fpradesh due to apossible dam burst as anticiapted by experts of karnataka in October,2000.
see the web site of ASIAN AGE :
http://www.asianage.com/india/cwc-cic-draw-swords-over-info-979
kindly request the concerned reporters of ASIANAGE who may be able to get copies of the relevant repoerts made by CWC on Alamatti Dam to ask the Krishna Tribunal to review the orders passed o n increasing the Height of Alamatti dam.
Prof.T.Shivaji Rao
Director, Center for Environmental Studies, GITAM University,and
Expert Member,cloud seeding project of Government of Andhra
pradesh,Hyderabad[A.P.] Visakhapatnam-530 045 INDIA
------------------------------------------------------------------------------------------------------------------------------------------
3. Industry Secretary for Maharashtra forwarded Prof.T.Shivaji Rao's letter on Alamatti dam to the Secretary for Irrigation, Government of Maharashtra for appropriate action and reply under copies marked to Prof.T.Shivaji Rao and also the Chief Minister of Maharashtra
Subject: Avoid Flood havoc of hundreds of Telangana villagesdue to dam
break consequent to rising the height of Alamatti dam to 524.5m
To: sec_irr@maharashtra.gov.in
CC: chiefminister@maharashtra.gov.in; shivajirao32@hotmail.com
From: sec_industry@maharashtra.gov.in
Date: Fri, 18 Feb 2011 13:23:01 +0530
E-mail dated 12.2.11 from Prof.Shivaji Rao received through PRO to CM is
forwarded herewith for appropriate action and reply.
A.M. Khan
Principal Secretary (Industries)
----- Forwarded by Industry Secretary/IE&LD/Mantralaya/Maharashtra on
02/18/2011 01:19 PM -----
------------------------------------------------------------------------------------------------------------------------------------------
2. Chief Minister of Maharashtra forwarded Prof.T.Shiaji Rao's e-mail to the Secretary for Industry ,Government of Maharashtra for taking necessary actionshivaji Rao
mail.com>
Rao
02/18/2011 08:20 cc:
PM "Cm,AP"
Subject: Avoid Flood havoc of hundreds of Telangana villagesdue to dam break
consequent to rising the height of Alamatti dam to 524.5m
To,
The principal secretary for Industries, Government of Maharashtra, MUMBAI.
Sir,
SUBJECT:Improper decision by Brijesh kumar Tribunal on incresing the Height of Alamatti Dam due to insufficient scxientific and technical reports supplied by all state Governments on Back water curves and Dam break analysis and copiexs of the same as computed wdere sent to you. But to-day,the News paper ":ASIAN AGE "has published a good News item that under RTI act,CWC is ordered to supply these reports on Baxck water Curves and DamBreak Analysis as made by Central water commission and unless we examine these reports,we cannot say whether they are based on proper scientific data to afrrive at proper conclusions.In the absence of these crucial rweports,the senior Advocates employed by Maharashtra would not have bveen in a position to establish the injury likely to occur to millions of people in West maharashtra due to back water afflux and to millions of farmers in karnataka and andhra fpradesh due to apossible dam burst as anticiapted by experts of karnataka in October,2000.
see the web site of ASIAN AGE :
http://www.asianage.com/india/cwc-cic-draw-swords-over-info-979
kindly request the concerned reporters of ASIANAGE who may be able to get copies of the relevant repoerts made by CWC on Alamatti Dam to ask the Krishna Tribunal to review the orders passed o n increasing the Height of Alamatti dam.
Prof.T.Shivaji Rao
Director, Center for Environmental Studies, GITAM University,and
Expert Member,cloud seeding project of Government of Andhra
pradesh,Hyderabad[A.P.] Visakhapatnam-530 045 INDIA
------------------------------------------------------------------------------------------------------------------------------------------
3. Industry Secretary for Maharashtra forwarded Prof.T.Shivaji Rao's letter on Alamatti dam to the Secretary for Irrigation, Government of Maharashtra for appropriate action and reply under copies marked to Prof.T.Shivaji Rao and also the Chief Minister of Maharashtra
Subject: Avoid Flood havoc of hundreds of Telangana villagesdue to dam
break consequent to rising the height of Alamatti dam to 524.5m
To: sec_irr@maharashtra.gov.in
CC: chiefminister@maharashtra.gov.in; shivajirao32@hotmail.com
From: sec_industry@maharashtra.gov.in
Date: Fri, 18 Feb 2011 13:23:01 +0530
E-mail dated 12.2.11 from Prof.Shivaji Rao received through PRO to CM is
forwarded herewith for appropriate action and reply.
A.M. Khan
Principal Secretary (Industries)
----- Forwarded by Industry Secretary/IE&LD/Mantralaya/Maharashtra on
02/18/2011 01:19 PM -----
------------------------------------------------------------------------------------------------------------------------------------------
Chief Minister
To: Industry Secretary/IE&LD/Mantralaya/Maharashtra@Maharashtra
02/15/2011 03:45 cc:
PM Subject: Avoid Flood havoc of hundreds of Telangana villagesdue to dam
break consequent to rising the height of Alamatti dam to 524.5m
Sir,
Forwarding you a letter received by Hon.CM for necessary action
PRO to CM
----- Forwarded by Chief Minister/Ministers/Maharashtra on 02/15/201104:05 PM -----
------------------------------------------------------------------------------------------------------------------------------------------
1. E-mail letter from Prof.T.Shivaji Rao, to the Chief Minister of Maharashtra on "Avoiding Flood havoc due to Alamatti dam"
shivaji Rao
"CM,maharashtra"mail.com>
min_rdd@maharashtra.gov.in>, RRpatil
cc:
Subject: Avoid Flood havoc of hundreds of Telangana villagesdue to dambreak
consequent to rising the height of Alamatti dam to 524.5m
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
According to the international Irrigation expert Dr.Lempererie, Chairman of ICOLD committee for France, the extreme flood is calculated by the formula S>3000Km2, Q=10,000(S/300)0.4 as published in his paper under the website:
http://bhujangam.blogspot.com/2010/12/dams-and-floods.html (L.Berga article onDams and Floods)
http://ebookbrowse.com/shall-we-forget-the-traditional-design-flood-pdf-d120750490
http://ebookbrowse.com/shall-we-forget-the-traditional-design-flood-pdf-d120750490
The extreme Probable Maximum Flood for Alamatti dam with a catchment area of 35,200 sq.km works out to 67,300 cumecs. However we opted to use 50,000 cumecs as PMF value for calculating the backwater curve for Alamatti Dam by using Mannings coefficient of 0.05
According to table-6 in the website the PMF in cumecs could be 2 to 3 times the catchment area measured in sq.km as in the case of Gandhi Sagar catchment area on Chambal river in Madhya Pradesh. Hence the peak flood assumed by the CWC for Alamati dam is an underestimate and the backwater calculations are also under estimated and hence the engineers of the Karnataka and Maharashtra state are completely mislead on the issue of submersion of Sangli and Kolhapur areas due to backwater impacts of Alamatti dam.
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 Calculations 15-01-2011 (for n=0.05, 50,000 cumecs, 524.25 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 | 35.25 | 524.25 | 1500 | 52875 | 50000 | 0.945626 | 0.045576 | 524.2956 | 33.66762 | 6250000 | 3.00395E+11 | 2.08059E-05 |
A to NH218-1 | 1 | 491 | 34 | 525 | 1500 | 51000 | 50000 | 0.980392 | 0.048989 | 525.049 | 32.52551 | 6250000 | 2.66931E+11 | 2.34143E-05 |
A to NH218-2 | 2 | 491 | 34.08373 | 525.0837 | 1500 | 51125.6 | 50000 | 0.977984 | 0.048749 | 525.1325 | 32.60213 | 6250000 | 2.69088E+11 | 2.32266E-05 |
NH218 | 3 | 491 | 34.08388 | 525.0839 | 1500 | 51125.82 | 50000 | 0.977979 | 0.048748 | 525.1326 | 32.60226 | 6250000 | 2.69092E+11 | 2.32263E-05 |
N to Res Approach | 1 | 494 | 31.13 | 525.13 | 1500 | 46695 | 50000 | 1.070778 | 0.058439 | 525.1884 | 29.88939 | 6250000 | 1.99976E+11 | 3.12537E-05 |
N to Res Approach | 2 | 494 | 32.2211 | 526.2211 | 1500 | 48331.66 | 50000 | 1.034519 | 0.054548 | 526.2757 | 30.89386 | 6250000 | 2.23869E+11 | 2.79182E-05 |
A Res approach | 3 | 494 | 32.2292 | 526.2292 | 1500 | 48343.8 | 50000 | 1.034259 | 0.05452 | 526.2837 | 30.9013 | 6250000 | 2.24053E+11 | 2.78952E-05 |
Res App to Algur | 1 | 498 | 28.28 | 526.28 | 1500 | 42420 | 50000 | 1.178689 | 0.070811 | 526.3508 | 27.2524 | 6250000 | 1.45959E+11 | 4.28204E-05 |
Res App to Algur | 2 | 498 | 28.80907 | 526.8091 | 1500 | 43213.61 | 50000 | 1.157043 | 0.068234 | 526.8773 | 27.74339 | 6250000 | 1.55111E+11 | 4.02937E-05 |
Res App to Algur | 3 | 498 | 30.36917 | 528.3692 | 1500 | 45553.76 | 50000 | 1.097604 | 0.061403 | 528.4306 | 29.18732 | 6250000 | 1.84398E+11 | 3.3894E-05 |
Algur | 4 | 498 | 30.39464 | 528.3946 | 1500 | 45591.96 | 50000 | 1.096685 | 0.061301 | 528.4559 | 29.21084 | 6250000 | 1.84906E+11 | 3.3801E-05 |
Al to Hippargi | 1 | 508 | 20.45 | 528.45 | 1500 | 30675 | 50000 | 1.629992 | 0.135417 | 528.5854 | 19.9072 | 6250000 | 50263485051 | 0.000124345 |
Al to Hippargi | 2 | 508 | 21.25591 | 529.2559 | 1500 | 31883.87 | 50000 | 1.568191 | 0.125343 | 529.3813 | 20.6701 | 6250000 | 57088356248 | 0.000109479 |
Al to Hippargi | 3 | 508 | 24.15233 | 532.1523 | 1500 | 36228.49 | 50000 | 1.380129 | 0.097082 | 532.2494 | 23.39881 | 6250000 | 86921708758 | 7.19038E-05 |
Hippargi | 4 | 508 | 24.35977 | 532.3598 | 1500 | 36539.66 | 50000 | 1.368376 | 0.095436 | 532.4552 | 23.59347 | 6250000 | 89400931672 | 6.99098E-05 |
Hi to Halyal | 1 | 513 | 19.45 | 532.45 | 1500 | 29175 | 50000 | 1.713796 | 0.149699 | 532.5997 | 18.95835 | 6250000 | 42608510058 | 0.000146684 |
Hi to Halyal | 2 | 513 | 20.39352 | 533.3935 | 1500 | 30590.28 | 50000 | 1.634506 | 0.136168 | 533.5297 | 19.85367 | 6250000 | 49807547782 | 0.000125483 |
Hi to Halyal | 3 | 513 | 23.60218 | 536.6022 | 1500 | 35403.28 | 50000 | 1.412299 | 0.101661 | 536.7038 | 22.88209 | 6250000 | 80577954558 | 7.75646E-05 |
Halyal | 4 | 513 | 23.90094 | 536.9009 | 1500 | 35851.42 | 50000 | 1.394645 | 0.099135 | 537.0001 | 23.16279 | 6250000 | 83981691905 | 7.4421E-05 |
Ha to Kudichi | 1 | 514 | 23 | 537 | 1500 | 34500 | 50000 | 1.449275 | 0.107054 | 537.1071 | 22.31565 | 6250000 | 74009754815 | 8.44483E-05 |
Ha to Kudichi | 2 | 514 | 23.17221 | 537.1722 | 1500 | 34758.32 | 50000 | 1.438504 | 0.105469 | 537.2777 | 22.47774 | 6250000 | 75848762119 | 8.24008E-05 |
Ha to Kudichi | 3 | 514 | 25.79436 | 539.7944 | 1500 | 38691.54 | 50000 | 1.292272 | 0.085116 | 539.8795 | 24.93672 | 6250000 | 1.07902E+11 | 5.79231E-05 |
Kudichi | 4 | 514 | 25.91604 | 539.916 | 1500 | 38874.06 | 50000 | 1.286205 | 0.084318 | 540.0004 | 25.05043 | 6250000 | 1.09583E+11 | 5.70343E-05 |
Ku to Diggerwadi | 1 | 515 | 25 | 540 | 1500 | 37500 | 50000 | 1.333333 | 0.09061 | 540.0906 | 24.19355 | 6250000 | 97360537527 | 6.41944E-05 |
Ku to Diggerwadi | 2 | 515 | 23.96622 | 538.9662 | 1500 | 35949.34 | 50000 | 1.390846 | 0.098596 | 539.0648 | 23.2241 | 6250000 | 84738443941 | 7.37564E-05 |
Old Diggerwadi | 3 | 515 | 26.56713 | 541.5671 | 1500 | 39850.69 | 50000 | 1.254683 | 0.080236 | 541.6474 | 25.65824 | 6250000 | 1.18889E+11 | 5.25698E-05 |
Odigg to Shaharpur | 1 | 518 | 23.64 | 541.64 | 1500 | 35460 | 50000 | 1.410039 | 0.101336 | 541.7413 | 22.91764 | 6250000 | 81003413824 | 7.71572E-05 |
Odigg to Shaharpur | 2 | 518 | 24.12187 | 542.1219 | 1500 | 36182.81 | 50000 | 1.381872 | 0.097328 | 542.2192 | 23.37023 | 6250000 | 86561791659 | 7.22028E-05 |
Odigg to Shaharpur | 3 | 518 | 26.00185 | 544.0018 | 1500 | 39002.77 | 50000 | 1.28196 | 0.083763 | 544.0856 | 25.13059 | 6250000 | 1.1078E+11 | 5.64182E-05 |
Odigg to Shaharpur | 4 | 518 | 26.05093 | 544.0509 | 1500 | 39076.4 | 50000 | 1.279545 | 0.083447 | 544.1344 | 25.17644 | 6250000 | 1.11468E+11 | 5.60697E-05 |
Odigg to Shaharpur | 5 | 518 | 26.39745 | 544.3975 | 1500 | 39596.18 | 50000 | 1.262748 | 0.081271 | 544.4787 | 25.49994 | 6250000 | 1.16414E+11 | 5.36879E-05 |
Odigg to Shaharpur | 6 | 518 | 27.81729 | 545.8173 | 1500 | 41725.94 | 50000 | 1.198295 | 0.073186 | 545.8905 | 26.82245 | 6250000 | 1.38266E+11 | 4.52027E-05 |
Shaharpur | 7 | 518 | 28.1521 | 546.1521 | 1500 | 42228.15 | 50000 | 1.184044 | 0.071456 | 546.2236 | 27.13361 | 6250000 | 1.43803E+11 | 4.34621E-05 |
Shr to Narsobawadi | 1 | 520 | 26.22 | 546.22 | 1500 | 39330 | 50000 | 1.271294 | 0.082375 | 546.3024 | 25.33431 | 6250000 | 1.13863E+11 | 5.48907E-05 |
Shr to Narsobawadi | 2 | 520 | 25.28054 | 545.2805 | 1500 | 37920.81 | 50000 | 1.318537 | 0.088611 | 545.3691 | 24.45618 | 6250000 | 1.00998E+11 | 6.18825E-05 |
Narsobawadi | 3 | 520 | 27.28208 | 547.2821 | 1500 | 40923.12 | 50000 | 1.221803 | 0.076086 | 547.3582 | 26.3245 | 6250000 | 1.29723E+11 | 4.81797E-05 |
Nar to Ankali | 1 | 525 | 22.35 | 547.35 | 1500 | 33525 | 50000 | 1.491424 | 0.113371 | 547.4634 | 21.70324 | 6250000 | 67346548672 | 9.28036E-05 |
Nar to Ankali | 2 | 525 | 23.8858 | 548.8858 | 1500 | 35828.7 | 50000 | 1.395529 | 0.099261 | 548.9851 | 23.14857 | 6250000 | 83806770070 | 7.45763E-05 |
Ankali | 3 | 525 | 25.8827 | 550.8827 | 1500 | 38824.04 | 50000 | 1.287862 | 0.084536 | 550.9672 | 25.01927 | 6250000 | 1.09121E+11 | 5.72761E-05 |
Ank to Sangli | 1 | 528 | 22.96 | 550.96 | 1500 | 34440 | 50000 | 1.4518 | 0.107427 | 551.0674 | 22.278 | 6250000 | 73587073961 | 8.49334E-05 |
Ank to Sangli | 2 | 528 | 21.14007 | 549.1401 | 1500 | 31710.11 | 50000 | 1.576784 | 0.12672 | 549.2668 | 20.56054 | 6250000 | 56070098083 | 0.000111468 |
Sangli | 3 | 528 | 24.25576 | 552.2558 | 1500 | 36383.65 | 50000 | 1.374244 | 0.096256 | 552.352 | 23.49588 | 6250000 | 88151855212 | 7.09004E-05 |
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