Anti-erosion Schemes

Anti-erosion Measures Completed

Brahmaputra Board has successfully completed the following anti-erosion measures in Assam and Nagaland -

  1. Protection of Nagrijuli, Rangia Town, Mukalmua and Barbhag area from floods and erosion of river Puthimari
  2. Anti-Erosion measures to protect  Kushiabil & Durgajan village at Dimapur of river Dhansiri(S) in Nagaland

On completion above schemes have been handed over to respective States for routine maintenance.

Implementation of Anti-erosion Measures underway -

Protection of Majuli from floods and erosion

Majuli is the largest inhabited River Island in the world. It is situated between latitudes 26º45’N and 27º10’N, and longitudes between 93º40’E and 94º35’E. Majuli has been the cultural capital and the cradle of Assamese civilization since the 16th century. Sankardeva, a pioneer of the medieval-age neo-vaishnavite movement, preached a monotheist form of Hinduism called as Vaishnavism and established monasteries and hermitages known as satras. The satras preserve antiques like weapons, utensils, jewellery and other items of cultural significance. The inhabitants of Majuli are mostly tribals - predominantly from the Mishing, Deori and Sonowal Kacharis tribes. Majuli is also famous for pottery.

Emergency Measure at Bengena-Ati

Majuli Island has constantly been subjected to erosion by the mighty Brahmaputra. Responsibility for undertaking anti-erosion works for protection of Majuli Island was given to Brahmaputra Board in the year 1999. Physical activities on the ground started in the year 2004.

The total area of the land mass of Majuli Main Island was 502.21 sq km in the year 2004. Since the year 2004, with regular implementation of ant-erosion / bank protection measures by Brahmaputra Board, the total area of Majuli Island has increased to 520.26 sq km till the year 2011. Currently, works under Phase-II and Phase-III are under execution, since 11th Five Year Plan. Spillworks works, such as completion of five spurs, river bank revetment, laying porcupines, construction of 'Raised Platforms' in low lying flood vulnerable areas are under execution and targeted to be completed by March 2014.

Links for report on 'Protection of Majuli Island from Floods and Erosion' prepared by Brahmaputra Board and 'Work Plan' for the year 2012-13 are provided hereunder-


Protection of Majuli Island from Floods and Erosion
Work Plan for the Year 2012-13

Financial Implication

Expenditure incurred by Brahmaputra Board on undertaking measures for protection of Majuli Island from floods and erosion since January 2004 under various Phases is detailed below-

Sl.
No.

Description

Estimated Cost
(`  in crore)

Actual Expenditure
(`  in crore)

Remarks

1

Immediate Measures
(Year 2004-2005)

6.22

5.92

Completed

2

Phase- I
(Years 2005-2011)

56.07

53.40

Completed

3

Emergent Measures (Year 2008)

4.99

4.62

Completed

4

Phase-II & Phase-III
( December 2013)

115.99

84.12
(up-to December,2013)

71.57% of physical progress has been achieved. The scheme is targeted to be completed by March 2014.

Total

183.27

148.06

 

 

 

 

 

 

 

 

 

Outcome

The following are the major achievements –

  1. Raising and Strengthening of 96.2 km of Embankment
  2. Without exception, there has continuously been loss of land of Majuli Island. Since implementation of protection measures by Brahmaputra Board trend of land loss got reversed. Particulars on net gain of land mass in Majuli Island are tabulated below -

 

Year

Area of Majuli Island
(in sq km)

Net Area reclaimed
(in sq km)

2004

502.21

 

2008

506.37

4.16

2011

520.26

13.89

2013

522.73

2.47

Total

20.52

 

 

 



 

 

 

 

Plan Ahead


Ministry of Water Resources, Government of India has constituted a ‘Standing Committee of Experts’ under the Chairmanship of Member (River Management), Central Water Commission to undertake visits to the work sites, advice / recommend and monitor implementation of protection measures. Based upon recommendations of 8th visit of ‘Standing Committee of Experts’, Brahmaputra Board has formulated a scheme – Protection of Majuli Island from Floods and Erosion-Phase-IV – at the estimated cost of Rs 200.13 crore for implementation during the 12th Five Year Plan. The scheme is under ‘Techno-Economic’ appraisal in Central Water Commission.

Avulsion of Brahmaputra at Dhola-Hatighuli (Restoration of Dibang and Lohit Rivers)

Avulsion of left bank of River Lohit occurred, at confluence of Lohit with Dibang - near Dhola-Hatighuli located in Dumdooma, Civil Sub-division of Tinsukia district - in the year 1989, due to breach in Saikhowa Bund. Gradual widening of the channel with time was threatening existence of more areas of Tinsukia and Dibrugarh Districts of Assam, situated all along the newly developed channel. Initially significant combined flow of Dibang and Lohit rivers started to flow through Anant Nala to Dangari – a tributary of river Dibru. Since the year 2000 the Balu Nala became dominant and almost entire diverted flow of Lohit and Dibang Rivers started passing through Balu Nala.Gradual widening of the channel with time was threatening existence of more areas of Tinsukia and Dibrugarh Districts of Assam, situated all along the newly developed channel.

The scheme “Avulsion of Brahmaputra at Dhola-Hatighuli (Measures for diversion of River Dibang to its original course) with ancillary anti-erosion measures” prepared by Government of Assam was approved by Ministry of Water Resources, Government of India in the Technical Advisory Committee (TAC) meeting held in May, 2002 and the Brahmaputra Board was entrusted with the responsibility for execution of the scheme. Total expenditure of Rs 49.39 crore has so far been incurred by Brahmaputra Board on execution of works envisaged under Phase-I through Phase-III and a part of works contemplated under Phase-IV.

Cultivation after construction of Tie Bund

With construction of 'Tie-Bund', the lands earlier used to form part of main channel of Dibang River are now completed protected from floods and erosion. The inhabitants deserted areas have returned back and restarted cultivation in a big way.

11 villages under Doomduma Revenue Circle in an area of about 1500 ha got protection from floods, since the year 2004 onwards, on construction of retirement bund at Hatighuli area on Left bank of Lohit river.

Sl. No.

Description

Estimated Cost
(Rs. in crore)

Actual Expenditure
(Rs. in crore)

Remarks

1

Phase-I (January 2003 to July 2004)

10.47

10.47

Completed

2

Phase- II  (January 2004 to July 2004)

5.22

4.16

Completed

3

Phase-III
(March 2007 to July 2007)

8.47

8.58

Completed

4

Phase-IV(December 2013)

54.43

46.86
(up-to December 2013)

96% of the physical progress has been achieved.

 

Total

78.59

70.07

 

 

Anti-erosion Schemes Planned to be executed during 12th Five Year Plan

The following Anti-erosion Schemes are planned to be executed during the 12th Five Year Plan –

    Links for report on 'Protection of Majuli Island from Floods and Erosion' prepared by Brahmaputra Board and 'Work Plan' for the year 2012-13 are provided hereunder-


    Protection of Majuli Island from Floods and Erosion
    Work Plan for the Year 2012-13