Wednesday 11 September 2013

పోలవరానికి హైకోర్టు గ్రీన్ సిగ్నల్

పోలవరానికి హైకోర్టు గ్రీన్ సిగ్నల్

September 11, 2013
హైదరాబాద్, సెప్టెంబర్ 11 : పోలవరంప్రాజెక్టు నిర్మాణానికి అడ్డంకులు తొలగిపోయాయి. పోలవరానికి హైకోర్టు పచ్చజెండా ఊపింది. పోలవరం టెండర్ల వ్యవహారంలో దాఖలైన పిటిషన్‌ను బుధవారం ఉదయం హైకోర్టు కొట్టివేసింది. పోలవరం టెండర్లను ప్రభుత్వం అనుభవం లేని ట్రాన్స్‌ట్రాయ్‌కు అప్పగించిందంటూ సోమా కంపెనీ హైకోర్టులో పిటిషన్ దాఖలు చేయగా దానిని హైకోర్టు కొట్టివేసింది. ప్రభుత్వం కేటాయించిన ట్రాన్స్‌ట్రాయ్ కంపెనీకి అనుకూలంగా ఉన్నతన్యాయస్థానం తీర్పునిచ్చింది.

Monday 9 September 2013

Water conflict

Water conflict
K. VENKATESHWARLU

Andhra Pradesh feels the second Krishna Water Disputes Tribunal's verdict has dealt a blow to the State.
KOMMURI SRINIVAS 

The Ongole branch canal under the Nagarjunasagar project command area near Chimakurthi in Prakasam district, Andhra Pradesh. The Krishna water flow may not be the same in future in view of the Krishna Water Disputes Tribunal-II award.

THE long-awaited verdict of the Krishna Water Disputes Tribunal-II allocating the “highest share” of the waters of the Krishna river to Andhra Pradesh has left the State shattered. The body blow is perceived to be so comprehensive that the State government is struggling to come up with a cogent response even after several days. Except for announcing that it will go in appeal for a review and seek clarifications to “erroneous assessments”, there has been no official word on the order given by the three-member tribunal headed by Justice Brijesh Kumar. The official line is that it was merely a draft report and the government will leave no stone unturned in safeguarding the interests of the State.
Preferring to adopt a cautious approach, it has constituted a 14-member team of technical and legal experts to peruse the tribunal order. Despite inviting flak for putting up a weak argument before the tribunal, the government seems to be in no mood to revamp its legal team. It has said that it will hold an all-party meeting before formulating its view.
Chief Minister N. Kiran Kumar Reddy has been holding consultations with officials and experts to weigh the options before the government. The verdict is widely perceived to be harmful to the interests of the State though on paper the tribunal has allotted 1,001 thousand million cubic feet (tmcft) to Andhra Pradesh. That is 190 tmcft more than what was allocated by the Bachawat Tribunal Award earlier.
Experts and political parties describe this gain as notional as it is worked out on the basis of an erroneous calculation of yearly river yields. They fault the tribunal's assessment of yields on the basis of 65 per cent dependability (sure yearly river water yields in 65 of 100 years) spread over a “shorter period” of the last 47 years.
In contrast, they argue, the Bachawat Tribunal's calculations were on the basis of yields of a longer period of 78 years at 75 per cent dependability. In fact, the State had favoured reckoning the yields for 112 years at 75 per cent dependability “as is universally accepted”, but KWDT-II rejected the argument.
Experts also feel that KWDT-II did not factor in the fact that Andhra Pradesh has received the full complement of its share of 811 tmcft only in a small number of years during the last five decades, sometimes just once in a decade. For the same reason of “lower and far between yields”, they question the tribunal's assessment of 448 tmcft surplus waters and the allocation of the same to three States – 190 tmcft to Andhra Pradesh, 177 tmcft to Karnataka and 81 tmcft to Maharashtra.
They argue that by going ahead with the distribution of the surplus waters, KWDT-II has taken away the liberty given by KWDT-I to Andhra Pradesh to use it, recognising its vulnerability as the lower riparian State. A lower riparian State is always at the mercy of the upper riparian States as it receives only water released by them.
‘Projects in peril'
The snatching away of this entitlement at one stroke apparently puts in peril seven ongoing projects built using 227 tmcft at a cost of Rs.32,000 crore with an ayacut of 24 lakh acres (one acre is 0.4 hectares). These include the Srisailam Left Branch Canal (30 tmcft), the Kalwakurthy (25 tmcft), the Nettampadu (22 tmcft), the Hundri Neeva (40 tmcft), the Galeru-Nagari (38 tmcft), the Valigonda (43 tmcft) and the Telugu Ganga (29 tmcft) projects – all located in some of the most drought-affected districts of the State.
Against this requirement of 227 tmcft, the tribunal has allocated 190 tmcft, leaving a question mark over the remaining water for the ongoing as well as future projects planned under“Jalayagnam”, a dream scheme of former Chief Minister Y.S. Rajasekhara Reddy. The argument is that the State has lost the opportunity to use exclusively surplus water whenever it was available.
While many experts say such allocation of unsure surplus water is improper, R. Vidyasagara Rao, former Chief Engineer, Central Water Commission, feels this will benefit the State as it can now claim these projects to be based on an assured supply of 190 tmcft. This would ensure easy permission from the CWC and funds from Planning Commission. But others do not buy this argument.
Alamatti dam height
The State's grievance is not confined to the allocation of assured and surplus waters in the Krishna river. It is now worried over KWDT-II allowing Karnataka to raise the height of the Alamatti dam to 524.256 metres. The contentious issue has been raging for over three decades now, with Andhra Pradesh even knocking on the doors of the Supreme Court.
It was after the State's objections that the height was pegged at 519.6 metres (for storing 173 tmcft) in the past, but with KWDT-II clearing the height increase, the State's worry is that Karnataka will be able to impound 130 tmcft more of the river water.
Andhra Pradesh has been doggedly objecting to the raising of the height of the dam as it not only exceeded the allocation made by KWDT-I to Karnataka but affected flows into two major reservoirs – Srisailam and Nagarjuna Sagar, thus proving to be the death knell for agriculture in the Krishna delta. There is apprehension that the increase in the height and storage capacity of Alamatti will further push up the delay in the release of water to Andhra Pradesh. “This would mean skipping of at least one crop season, affecting production of foodgrains and productivity as the release of water is now possible only in September and October,” said Leader of the Opposition N. Chandrababu Naidu. Many experts endorse this point. They feel the release of 8 tmcft water from Alamatti in June-July mandated by KWDT will be hardly sufficient for even raising nurseries.
CH. VIJAYA BHASKAR 

Telugu Desam Party workers stage a roadblock at Hanuman Junction in Krishna district against the State government's "failure to present strong arguments before Krishna Water Disputes Tribunal" in respect of the Alamatti dam, in July 2010.

Politicians and experts do not pin their hopes on the inter-State board suggested by KWDT-II to regulate river water flows, citing the example of the one existing for the Cauvery and the raging dispute between Karnataka and Tamil Nadu. With no statutory powers, the board will remain a toothless wonder, they argue. Former Engineer-in-Chief T. Hanumantha Rao instead suggests the appointment of a statutory authority taking the entire Krishna basin as a unit to monitor the yield of the river. A project-wise working table will have to be maintained for the daily flow of water into projects to ensure equitable distribution.
Andhra Pradesh feels injustice was done to it in the case of the Tungabhadra sub basin too as the allocation for Karnataka was raised from 307 tmcft (by the Bachawat Tribunal) to 360 tmcft by KWDT-II, including 40 tmcft for the Upper Thunga, the Upper Bhadra and the Singatalur projects. Andhra Pradesh describes these as “illegal” as they affect projects in the State.
Even as it is widely held that KWDT-II “blatantly favoured Karnataka and Maharashtra” and handed out a raw deal to Andhra Pradesh, there is criticism from the Telugu Desam Party, the Communist Party of India, the Communist Party of India (Marxist), the Bharatiya Janata Party and the Praja Rajyam Party that the government failed to argue the case before KWDT-II effectively. Chandrababu Naidu blamed the Congress both at the Centre and in the State for the “fiasco”.
He alleged that former Chief Minister Rajasekhara Reddy failed miserably in articulating the State's views before the tribunal. He was happy keep his party high command and Union Law Minister M. Veerappa Moily, who belonged to Karnataka, in good humour for his political survival even by mortgaging the interests of the State, Chandrababu Naidu said.
Another charge is that while Maharashtra and Karnataka hired the services of the best legal experts, Andhra Pradesh fielded a lawyer who was removed from the post of Advocate General for being inefficient. “The verdict is a gift for the people for returning the Congress twice, in 2004 and 2009. It will have to pay a heavy price for such neglect,” he said.
Experts admit that the government had botched up on several counts by putting up a “half-hearted, weak and inconsistent argument”. For instance, the State kept arguing right from the beginning that there was no surplus water, citing yearly yields, but it submitted a list of seven projects based on such water. When the tribunal pulled up the State for such contradictions, the government gave a written clarification saying it would not claim any right over such water for these projects.
Again, while claiming that it wasnot receiving its share of 811 tmcft of water on a year-to-year basis,the State submitted documents showing utilisation of 1,058 tmcft to “strengthen its argument” that it was using more water as the upper riparian States were unable to use their share.
Justice Brijesh Kumar himself is believed to have pointed to such inconsistencies and observed that the State had failed to come up with specific evidence to substantiate its charge that increasing the height of the Alamatti dam would affect many of its projects. He cited an expert estimate that the loss from increasing the height was at 70 tmcft when the government's claim was 121 tmcft.

Similarly, but for harping on the need to lay a parallel canal from the siltation-hit Tungabhadra dam or raising the height to enable the State to use its allocation, the government did not come up with any elaborate study and documentation. It was confined to its imagination and did not reflect in the documents the State submitted, he is reported to have observed. As the government gets into damage control mode, farmers in the State wonder whether they will be able to raise a crop relying on canal irrigation, given the vicissitudes and complexity of inter-State river water distribution.

Sunday 8 September 2013

జలం.. జగడం!

జలం.. జగడం!

September 09, 2013




హైదరాబాద్, సెప్టెంబర్ 8 : రాష్ట్ర విభజన ప్రకటన నేపథ్యంలో కృష్ణా జలాల వినియోగంపై ప్రధాన చర్చ జరుగుతోంది. ఇందులో శ్రీశైలం రిజర్వాయర్ పాత్ర చాలా కీలకం. రాష్ట్ర విభజన జరిగితే శ్రీశైలం నీటి వినియోగం ప్రధానాంశం కానుంది. కేంద్ర ప్రభుత్వ ఆధ్వర్యంలో ఏర్పడే కృష్ణా జలాల వినియోగ మండలి కేటాయింపుల ఆధారంగానే నికర/మిగులు జలాలను అన్ని రాష్ట్రాలు వాడుకోవాల్సి ఉంటుంది. విభజన తర్వాత కృష్ణా జలాల వినియోగంపై కృష్ణా డెల్టా, సాగర్ ఆయకట్టుదారులకు ప్రస్తుతమున్న స్వేచ్ఛ ఉండకపోవచ్చు. వీరి అధిక వినియోగాన్ని కట్టడి చేస్తే.. తమకు కృష్ణా నీళ్లు దొరుకుతాయన్నది రాయలసీమ వాసుల వాదన.

కృష్ణా డెల్టా, నాగార్జునసాగర్‌లకు బచావత్ ట్రిబ్యునల్ కేటాయింపుల ప్రకారమే నీటిని విడుదల చేస్తే.. కృష్ణా మిగులు జలాల ఆధారంగా చేపట్టిన వెలిగొండ (ఆంధ్ర), గాలేరు-నగరి, హంద్రి-నీవా (రాయలసీమ), ఎస్ఎల్‌బీసీ, కల్వకుర్తి, నెట్టెంపాడు (తెలంగాణ) ప్రాజెక్టులకు కచ్చితంగా మిగులు జలాలు లభ్యమవుతాయని నీటిపారుదల రంగ నిపుణులు కూడా వాదిస్తున్నారు.

ఈ ఆరు ప్రాజెక్టులకు 198.50 టీఎంసీల కృష్ణా జలాలు కావాల్సి ఉంది. ఈ నీటిని శ్రీశైలం రిజర్వాయర్ నుంచి భవిష్యత్తులో పంపిణీ చేయాల్సి ఉంటుంది. అందుకే శ్రీశైలం ప్రాజెక్టు వ్యవహారం అత్యంత సున్నితాంశంగా మారింది. రాష్ట్ర విభజన జరిగితే కృష్ణా నదిపై తెలంగాణ ఎగువ రాష్ట్రంగా, సీమాంధ్ర దిగువ రాష్ట్రంగా మారతాయి. ప్రస్తుతం బ్రిజేష్‌కుమార్ ట్రిబ్యునల్ ముందు మహారాష్ట్ర, కర్ణాటకల విషయంలో ఆంధ్రప్రదేశ్ చేస్తున్న వాదనే.. భవిష్యత్తులో తెలంగాణ, సీమాంధ్రల మధ్య తెరపైకిరావచ్చు. కృష్ణా నికర జలాల (75% లభ్యత ఆధారంగా లెక్కగట్టిన 811 టీఎంసీలు) వినియోగం విషయంలో బచావత్ ట్రిబ్యునల్ గతంలోనే ఆంధ్రప్రదేశ్‌లోని ప్రాజెక్టుల వారీగా కచ్చితమైన కేటాయింపులను చేసింది.

ఈ కేటాయింపులను మార్చే అధికారం ప్రస్తుత బ్రిజే ష్‌కుమార్ ట్రిబ్యునల్‌కు కూడా లేదు. అలాగే భవిష్యత్తులో ఆంధ్రప్రదేశ్ విభజన తర్వాత తెలంగాణ, సీమాంధ్ర రాష్ట్రాలకూ ఆ కేటాయింపులను మార్చే అధికారం ఉండదు. ప్రస్తుత బ్రిజేష్‌కుమార్ ట్రిబ్యునల్ కేవలం మిగులు జలాల (65% లభ్యత ఆధారంగా లెక్కగట్టినవి) పంపిణీపైనే దృష్టి పెట్టింది. ఇందులో రాష్ట్రానికి 198.50 టీఎంసీల మిగులు జలాలను కేటాయించింది.


మిగులు జలాల ఆధారంగా చేపట్టిన వెలిగొండకు 43.50 టీఎంసీలు, హంద్రి-నీవాకు 40 టీఎంసీలు, గాలేరు-నగరికి 38 టీఎంసీల వంతున మొత్తం 121.50 టీఎంసీల నీరు కావాలి. అలాగే తెలంగాణకు చెందిన ఎస్ఎల్‌బీసీకి 30 టీఎంసీలు, కల్వకుర్తి ఎత్తిపోతలకు 25 టీఎంసీలు, నెట్టెంపాడు ఎత్తిపోతలకు 22 టీఎంసీలు కలిపి మొత్తం 77 టీఎంసీలు కావాలి. బచావత్, బ్రిజేష్‌కుమార్ ట్రిబ్యునళ్ల ప్రకారం నది పరీవాహక ప్రాంత అవసరాలు తీరిన తర్వాతే.. ఇంకా నీళ్లు(నికర/మిగులు) మిగిలి ఉంటేనే మిగతా అవసరాలు తీర్చాల్సి ఉంటుంది. దీని ప్రకారం కృష్ణా నది పరీవాహక ప్రాంతంలో ఉండే ఎస్ఎల్‌బీసీ, కల్వకుర్తి, నెట్టెంపాడు ప్రాజెక్టుల అవసరాలకు ముందుగా కేటాయింపులు జరగాల్సి ఉంటుంది.

పరీవాహక ప్రాంతం బయట ఉన్న వెలిగొండ, హంద్రి-నీవా, గాలేరు-నగరిలకు ఆ తర్వాతే కేటాయింపులు చేయాల్సి ఉంటుంది. ఇదే విధానాన్ని అంతర్జాతీయంగా అనుసరిస్తున్నారు. ఈ సూత్రం ప్రకారం ఎస్ఎల్‌బీసీ, కల్వకుర్తి, నెట్టెంపాడులకు కావాల్సిన 77 టీఎంసీల్లో పోలవరం కుడి కాల్వద్వారా లభించే 45 టీఎంసీలు, బ్రిజేష్‌కుమార్ ట్రిబ్యునల్ జూరాలకు కేటాయించిన 9 టీఎంసీలు, నాగార్జునసాగర్/శ్రీశైలంలకు క్యారీ-ఓవర్ కింద కేటాయించిన 30 టీఎంసీలలో 23 టీఎంసీలను కేటాయించవచ్చు.

ఇక సంక్షోభ సంవత్సరాల్లో కృష్ణా ఆయకట్టుదారుల భవిష్యత్తు అవసరాల కోసం క్యారీ-ఓవర్ కింద నాగార్జునసాగర్‌కు కేటాయించిన 120 టీఎంసీలను వెలిగొండ, హంద్రి-నీవా, గాలేరు-నగరి ప్రాజెక్టులకు కేటాయించవచ్చు. ఇవన్నీ రాష్ట్ర ప్రభుత్వ ఉత్తర్వులతోనే చేసుకోవచ్చునని నిపుణులు సూచిస్తున్నారు. ఈ కేటాయింపులు చేసినా కృష్ణా డెల్టా ఆయకట్టుదారులకు ఎలాంటి ఆందోళన అక్కర్లేదని, డెల్టా అవసరాలకు వెన్నుదన్నుగా ఉండటం కోసం పోలవరం కుడి కాల్వ, పులిచింతల ప్రాజెక్టులను నిర్మిస్తున్నారు కాబట్టి.. ఆంధ్రా రైతులు భయపడాల్సిందేమీ లేదని నిపుణులు పేర్కొంటున్నారు.

అలాగే దుమ్ముగూడెం-నాగార్జునసాగర్ టెయిల్ పాండ్ ప్రాజెక్టు నిర్మాణం ద్వారా 160 టీఎంసీల గోదావరి వరద జలాలను కృష్ణా బేసిన్‌కు తరలిస్తున్నందున.. ఆ నీటితో కృష్ణా డెల్టా, నాగార్జునసాగర్ ఎడమకాల్వ ఆయకట్టుదార్లకు అదనపు హామీ ఉంటుందని, టెయిల్‌పాండ్ ద్వారా కృష్ణాలో మిగిలే నీళ్లను మూడు ప్రాంతాల్లోని మిగులు జలాల ప్రాజెక్టులకు విడుదల చేయవచ్చని నిపుణులు సూచిస్తున్నారు.


కృష్ణా జలాల వినియోగంపై భవిష్యత్తులో కేంద్రం ఆధ్వర్యంలో ఏర్పడే బోర్డుకు ప్రత్యేక న్యాయాధికారాలు ఉండాలని ఇన్‌స్టిట్యూషన్ ఆఫ్ ఇంజనీర్స్ మాజీ అధ్యక్షుడు, నీటిపారుదల రంగ నిపుణుడు జి.ప్రభాకర్ సూచించారు. నైలునదీ జలాల పంపిణీ పర్యవేక్షణకు ఏర్పాటు చేసిన బోర్డుకు ఉన్నట్టుగానే.. కృష్ణా జలాల పంపిణీ పర్యవేక్షణ బోర్డుకు ప్రత్యేక అధికారాలను కట్టబెట్టే విధంగా విభజన సమయంలోనే కేంద్రంపై అన్ని ప్రాంతాల నేతలు ఒత్తిడి తేవాలన్నారు. తుంగభద్ర బోర్డుకు న్యాయాధికారాలు లేనందువల్లే.. దాని నిర్ణయాలకు కర్ణాటక తిలోదకాలిస్తోందని అన్నారు. సంక్షోభ సంవత్సరాల్లో కృష్ణా జలాల వినియోగంపై విభజన సమయంలోనే నిపుణులతో కమిటీని ఏర్పాటు చేసి.. ఒక కట్టుదిట్టమైన ఫార్ములాను తయారు చేసుకోవాలన్నారు.
S. NO Project  Region  Venue Ayacut        Lk / Acres Requirement in TMCs Allot ment in TMCs
1 Veligonda Andhra Near Markapur, Prakasham Dist. 4.47 43.50 0.00
2 Handri - Neeva Sujala Sravanthi project Rayalaseema  Kurnool, Anatapur, Chittoore 6.00 40.00 0.00
3 Galeru - Nagari   Rayalaseema  2.60 38.00 0.00
4 Teluguganga  Rayalaseema  Kurnool, Kadapah,  Chittoore, Nellore  5.23 29.00 25.00
5 SRBC  Rayalaseema  Kurnool Kadapah 2.50 19.00 19.00
6 SLBC  Telangana  Mahaboobnagar Nalgonda 3.70 30.00 0.00
7 Kalwakuthy Telangana  Mahaboobnagar Dist. Kalwakuthy, Kollapur 3.40 25.00 0.00
8 Nettempadu  Telangana  Mahaboobnagar dist. Alampur, Gadwal  2.00 22.00 0.00



























































































































Monday 26 August 2013

A.P. Irrigation Overview

http://irrigation.cgg.gov.in/jsp/wris.jsp



Water Resources Information System(WRIS) provides information on irrigation projects in all sectors - Major, Medium and Minor/Lift irrigation. The information is available district-wise for all the three sectors. For major and medium irigation, project-wise information can be accessed.

A.P. Irrigation Overview

Total Geographical area         2.75  Lakh Sq. Kms
Total Irrigable area         393   Lakh Acres
Present Irrigable Land         292   Lakh Acres
Total area under Irrigation Sources 134   Lakh Acres ( 3/04 )
IP Created so far by I&CADD 111   Lakh Acres ( 3/04 )
Ultimate IP                  217  Lakh Acres
Dependable availability of water 2746 TMC
Utilization                 2092 TMC
 

 

Sunday 25 August 2013

K. C. Canal

K. C. Canal
From Wikipedia, the free encyclopedia
Kurnool Cuddappah Canal popularly known as K. C. Canal is an irrigation canal located in Kurnool and Cuddapah districts in Andhra Pradesh, India.[1][2][3]

The K.C. Canal was constructed during the years 1863 to 1870 as an irrigation and navigation canal. This canal interconnects the rivers Penner and Tungabhadra. It starts from the Sunkesula barrage located on Tungabhadra River near Kunool city.[4]

Navigation system was abandoned during the year 1933 and the canal continued to be a major irrigation source. To improve the efficiency of the system, modernization of the entire canal and repairs/reconstruction of the structures is taken up under K.C. canal modernization. The project is under construction to stabilize entire ayacut of KC Canal and to develop the gap ayacut of 60,000 acres. The canal presently irrigates nearly 1,70,000 acres with 40 Tmcft water utilisation from the Krishna river.
Assured water availability[edit source | editbeta]

Alternate water supply from Srisailam reservoir is provided via Veligodu reservoir constructed under Telugu Ganga project. Also water can be pumped and fed to KC canal from the recently commissioned Handri-Neeva lift canal pump house from the Srisailam reservoir when its water level is below the minimum drawdown level of Pothireddypadu head regulator which also feeds Telugu Ganga, Srisailam right bank canal and Galeru Nagari projects. Thus this 150 years old canal is provided with reliable water supply to meet the drinking water needs of Rayalaseema region even during the acute drought years.

Pothireddypadu or Velugodu Reservoir i

Pothireddypadu Reservoir

From Wikipedia, the free encyclopedia

Pothireddypadu or Velugodu Reservoir is a balancing reservoir and located across the Kundhu tributary of Penna river at Veligodu village in Kurnool district of Andhra Pradesh.[1][2][3] This reservoir is part of Telugu Ganga project and mainly fed by gravity canal from back waters of Srisailam Dam through Pothireddypadu head / flow regulator located across the feeder canal. Velugodu Reservoir has gross storage capacity of 17 Tmcft at 265 m MSL full reservoir level.
This feeder canal also supplies water to Chennai city drinking water, Srisailam Right Bank Canal, K. C. Canal and Galeru Nagari Canal in addition to divert the Krishna river flood water to Penna river for storage in Somasila and Kandaleru reservoirs situated in Nellore district. The flow capacity of the canal is 40,000 cusecs

Pula Subbaiah Veligonda Project

The Robbins Company

Pula Subbaiah Veligonda Project


Double Shield bores Water Transfer Tunnel beneath Indian Tiger Sanctuary

Machine TypeDouble Shield TBM
Diameter10.0 m (32.8 ft)
Tunnel TypeWater Transfer
Tunnel Length19.2 km (11.9 mi)
OwnerGovernment of Andhra Pradesh
ContractorCoastal Projects Ltd (CPL) / Hindustan Construction Company (HCC) JV
LocationPrakasam District, Andhra Pradesh, India

Project Overview

Double Shield TBM for the Veilgonda Water Transfer TunnelBeneath India’s largest tiger sanctuary, the Nagarjuna Sagar National Park, tunnel boring machines are orchestrating one of the largest water transfer schemes in India. A Robbins Double Shield TBM is boring tunnel No. 2 of the Pula Subbaiah Veligonda project for Coastal Projects Ltd. (CPL), of the CPL/ Hindustan Construction Company (HCC) JV.
On the Krishna River, on the right bank of the Srisailam Canal, lies the future inlet site for the Pula Subbaiah Veligonda Project. Once complete in 2014, the system will draw 1.2 billion cubic meters (317.0 billion gallons) of flood water annually from the foreshore of the Srisailam reservoir.   Two parallel, 19.2 km (11.9 mi) long tunnels will transfer water via a network of five canals to over 1,600 square kilometers (395,368 acres) of farmland in the three districts of Prakasam, Nellore, and Kadapa.  Up to 243 cubic meters per second (64,193 gallons per second) of water will travel through the bored tunnels to a feeder canal.
In October 2007, a USD $180 Million contract was awarded to Coastal Projects Pvt. Ltd (CPPL). In November, CPPL signed a contract for a 10.0 m (32.8 ft) diameter Robbins Double Shield TBM and continuous conveyor system. In addition to the machine and conveyor, spares and key operating personnel were sent to the jobsite to excavate tunnel no. 2 starting from the outlet end.
The Veligonda tunnel no. 2 is located in sedimentary rock on the western margin of the Cuddapah Basin, where a number of faults and folds make for complex geology.  Rock includes quartzite with interbedded shale (60%) and shale with limestone and phyllite (40%) ranging from 90 to 225 MPa (13,000 to 33,000 psi) UCS. Two major faults are expected along with some ground water.
The Double Shield machine utilizes sixty-seven 20-inch diameter back-loading cutters to combat the tough ground conditions. Specially designed drive motors allow the machine to run at a higher than normal RPM, compensating for low penetration rates in the hard rock.  In squeezing ground, the cutterhead is also capable of vertical movement  allowing for overboring. The machine also has a probe drill which allows for verification of geology 30 m (98 ft) ahead of the TBM.  The drill is capable of 360º rotation and can alternatively serve as a grout consolidation drill.  Large 40 kW (54 hp) dewatering pumps located on the back-up system have been specially designed to pump any water away from the tunnel face. As the TBM bores, it erects 300 mm (12 inch) thick concrete segments in a 6+1 arrangement, making the final tunnel diameter 9.2 m (30 ft).
Muck haulage requires one of the most extensive conveyor systems ever used in India.  The continuous steel cable belt, the longest single flight ever provided by Robbins, will extend 19.2 km (11.9 mi) and requires four main drives and three booster drives.
Double Shield TBM for the Veligonda Water Transfer TunnelThe machine was assembled in just four months using Onsite First Time Assembly (OFTA).  OFTA is a process that allows machine components to be initially assembled at the jobsite, rather than in a manufacturing facility, typically providing savings in terms of man-hours and shipping costs. Assembly went well despite harsh local temperatures, which can climb to 45˚C (113˚F) daily. In addition, some components could only be installed at night due to thermal expansion in the midday heat.
The Robbins TBM was launched in June 2009, while a neighboring machine excavated the parallel Tunnel No. 1. The neighboring machine, built by another manufacturer, started months earlier and was several kilometers ahead. Approximately 3.4 km (2.1 mi) into tunneling, the machine bored into an unforeseen area of disturbed geology and was inundated with flowing material. The machine became stuck, and multiple attempts to free the cutterhead were unsuccessful. As of March 2011, the TBM had not moved in over a year.
The Robbins TBM has advanced through this area, at rates of up to 330 m (1,080 ft) per month, by adopting an extensive program of probe drilling and pre-grouting. Multiple drill holes were bored 30 m (100 ft) ahead prior to every machine push, and grout was then injected at depths of 25 to 30 m (80 to 100 ft).
Updates of this project will be posted as boring continues.

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Related Materials

RRS calls for struggle for river water share

RRS calls for struggle for river water share


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‘Irrigation projects in Rayalaseema are dependent on flood waters’

Rayalaseema Rashtra Samiti President Kuncham Venkatasubba Reddy on Wednesday said a concerted struggle was imperative for irrigation water share to the perennially drought-prone Rayalaseema region.
Referring to Jalayagnam, Mr. Reddy asserted in a press conference here that irrigation projects undertaken in Telangana and coastal Andhra regions had assured water supply, but those in Rayalaseema had no water allocation and were dependent on flood waters.
The region has witnessed several droughts since 1876 and is affected by drought almost every alternate year, he said. If the projects in the region are not allocated water, the region could be desertified and future generations will not pardon the leaders, he asserted.
Andhra Pradesh is getting 2,746 tmc. river water including 1,494 tmc. of Godavari water, 811 tmc. of Krishna water, 98 tmc. of Pennar water and 342 tmc. from other water sources, Mr. Venkatasubba Reddy said. If the water was equitably allotted to the three regions having a total extent of 6.78 crore acres, each acre should get .0000405 tmc per acre. Going by this ratio, 1.65 crore acres in Rayalaseema should get 671.49 tmc., 2.83 crore acres in Telangana should get 1,148.63 tmc. and 2.28 crore acres in coastal Andhra should get 929.95 tmc., he explained.
However, water allocation for Rayalaseema region was a meagre 122.70 tmc. including 39.90 tmc. for KC Canal, 29.50 tmc. for Tungabhadra Low-Level Canal, 32.50 tmc. for Tungabhadra High-Level Canal, 4.90 tmc. for Bhairavathippa project, two tmc. for Gajuladinne project and 13.90 tmc. under minor irrigation tanks, the RRS President said. Statistics reveal that Rayalaseema was getting only 18 per cent of the assured water due to it, he said.
The neglect of the region’s irrigation interests was evident by the situation, he said. He demanded allotment of assured water for projects undertaken under Jalayagnam scheme. They included 45 tmc. for Handri Neeva Sujala Sravanthi, 38 tmc. for Galeru Nagari Sujala Sravanthi, 45 tmc. for Telugu Ganga project, 19 tmc. for Srisailam Right Branch Canal and 44 tmc. for Veligonda project. He also demanded the implementation of the recommendations of the Khosla Committee.

  • ‘The region could become a desert and future generations will not pardon the leaders’
  • ‘Statistics reveal that Rayalaseema is getting only 18 per cent of the assured water’

  • Work on Veligonda project resumes

    Work on Veligonda project resumes

    M. MALLESWARA RAO
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    The massive Veligonda project. Photo: Special Arrangement
    The massive Veligonda project. Photo: Special Arrangement

    Operations disrupted after tunnel boring machine breaks down

    A group of mechanical engineers, specially brought from Italy, have successfully repaired the Tunnel Boring Machine (TBM) purchased from a US firm - Robins for Rs.120 crore for the gigantic Veligonda, a project taken up to benefit the vast fluoride- affected areas in Prakasam, Kadapa and Nellore districts.
    It’s like acquiring a new asset worth that much. The gargantuan machine on rails that resembles a long goods wagon and moves inch by inch, boring holes sideways, is most sought-after device in the whole world for excavating tunnels of massive diameter, substituting the time-consuming and hazard-prone manual blasting method.
    The TBM was damaged when a portion of the roof of the tunnel it was drilling, collapsed on it. By then, it had completed eight km of one of the twin tunnels, planned for Veligonda each with 18-km length to draw 53 tmcft of water from Srisailam reservoir lying 40 km away during the flood season (July-October). This tunnel is of seven metre diameter. The 40-km stretch will be covered by a gravitation canal partially linked to the tunnels. The government had lost every hope of restoring the machine as repeated attempts earlier by site engineers to rectify it turned futile. After overhauling, the TBM is being pressed into service in two days, says V. Veeraju, Chief Engineer, Irrigation, Prakasam. A second 9.2- metre diameter tunnel is similarly completed for 7.5 km using a bigger TBM (cost Rs.150 crore). Conceived by K. Sriramakrishnaiah, Irrigation adviser to NTR and named after Poola Subbaiah, a communist leader who fought for such a project as a permanent solution to fluoride-affected areas, was finally taken up under Jalayagnam.
    Planned at a cost of Rs.5,150 crore to irrigate 4.5 lakh acres in the three districts and provide drinking water to 15.25 lakh population in 30 affected mandals, Veligonda is expected to change crop pattern in the area. Interestingly, a 40-sq km area surrounded by hills at Veligonda will be converted into the project’s reservoir filled with Srisailam water. Three imposing dams have been built as part of the project at Sunkesula, Gottipadia and Kakarla to fill the gaps between hills. Sixty per cent of Veligonda into which a sum of Rs.3,148 crore has been pumped so far, is completed.