Flood & Erosion Control & Irrigation Programmes in the North Eastern

FLOOD & EROSION CONTROL & IRRIGATION PROGRAMMES IN THE NORTH EASTERN REGION

3rd Sectoral Summit of North Eastern Council (11.03.2007)

Ministry of Water Resources

LAND & WATER RESOURCES NE REGION

WATER AVAILABILITY • All India 1869.00 BCM • Brahmaputra & Barak Basin 586.00 BCM • Geographical area of NER 26.13 M ha • Cultivable area 6.31 M ha • Ultimate Irrigation Potential of NER 4.32 M ha (MMI & Minor Irrigation) • Irrigation Potential created in NER 1.44 M ha (MMI & Minor Irrigation) (TILL MARCH,2004)

1 A. FLOODS & EROSION CONTROL FLOOD SCENARIO • The topographical and the geographical location of North East Region is unique with the hydro-meteorological situation making it one of the highest rainfall zone in the World. • The main rivers causing floods in the North-east region are the Brahmaputra, Barak and their tributaries. • Flood - Main causes: – High Flows – Inundation – Drainage congestion – Bank erosion • Floods in Assam are caused mainly due to narrowness of the valley, high rainfall in the catchment, unstable steep slopes, long monsoon period etc 3

FLOOD PRONE AREAS IN N-E REGION

2 Flood prone area of N-E States

Sl. State Geographical Flood prone Flood prone No. area(mha) area (mha)( As area (mha) (As assessed by reported by RBA) State Government) 1 Arunachal Pradesh 8.37 - 0.12 2 Assam 7.85 3.15 3.82

3 Manipur 2.24 0.08 0.08

4 Meghalaya 2.24 0.02 0.10

5 Mizoram 2.11 - 0.05 6 Nagaland 1.66 - 0.01 7 Tripura 1.05 0.33 0.33 8 Sikkim 0.71 - 0.0 Total 26.23 3.58 4.53

BROAD STRATEGY FOR FLOOD & EROSION MANAGEMENT

• Absolute flood control and protection not feasible; reasonable degree of protection from flood losses at economic costs necessary • A combination of structural and non-structural measures in a phased manner is the most accepted strategy for flood management • A comprehensive approach towards management of flood

3 Broad Functions of CWC in NE Region • Flood Forecasting and Warning system • Maintains Hydro Meteorological stations • Undertakes surveys and investigation • Monitoring of Irrigation projects • Techno economical appraisal of irrigation & flood management schemes • Technical Advice to N-E States & others regarding flood and erosion problems.

Flood Forecasting & Warning System

Flood Forecasting(FF) & Warning System plays a significant role in reducing the loss of life and movable property during floods. CWC have a National Network of 26 FF Stations in NE Region.

Forecasts are formulated using 0800 hrs/ 0900 hrs water level data and issued at 1000 hrs with advance warning time ranging from 6 hrs to 36 hrs in NER during flood season.

4 MAP OF NORTH EASTERN REGION

ara hy MAP OF us K TRIPURA ASSAM

22 H a S n E h D D h

a g M l e a A i a M n L u G N A MIZORAM B

G u m ti LEGEND

23 F F STATIONS FLOOD AFFECTED AREA

5 FF Stations of CWC

Sl.No River Site State 1 Brahmaputra Dibrugarh Assam 2 Brahmaputra Neamatighat Assam 3 Brahmaputra Tezpur Assam 4 Brahmaputra Guwahati Assam 5 Brahmaputra Goalpara Assam 6 Brahmaputra Dhubri Assam 7 Burhidihing Naharkatia Assam 8 Burhidihing Chenimari(Khowang) Assam 9 Subansiri Badatighat Assam 10 Dikhow Shivsagar Assam 11 Desang Nanglamoraghat Assam 12 Dhansiri (S) Golaghat Assam

13 Dhansiri (S) Numaligarh Assam 11

FF Stations of CWC(Contd…)

Sl.No River Site State 14 Kopilli Kampur Assam 15 Kopilli Dharmatul Assam 16 Jiabharali Jiabharali(NTX) Assam 17 Puthimari Puthimari (NTX) Assam 18 Pagladiya Pagladia(NTX) Assam 19 Barak APGhat Assam 20 Katakhal Matizuri Assam 21 Kushiyara Karimganj Assam 22 Manu Kailashar Tripura 23 Gumti Sonamura Tripura 24 Beki Beki NHX Assam 25 Manas Manas NHX Assam

26 Sankosh Golakganj Assam 12

6 FF Network Modernisation

Flood forecasting network in NE region is to be modernised by using state of art technology Data Collection: Automatic Sensors Data Transmission: Automatic Data Transmission Technique e.g. Satellite, VSAT, Internet/Email, Mobile Phones etc Forecast Formulation: Computer Based Comprehensive Catchment Models. Forecast Dissemination: Computer Network and Satellite, Internet, E-mail etc.

Hydro Meteorological Observations

Hydrological data of river basin is a pre-requisite for an accurate assessment of Water Resources, Planning optimum utilization for comprehensive development and flood management. CWC operates 133 hydro meteorological observation sites (State wise) in NE Region

Sl. No. State No. of sites 1. Arunachal Pradesh 21 2. Assam 69 3. Manipur 1 4. Meghalaya 7 5. Mizoram 6 6. Nagaland 0 7. Sikkim 16 8. Tripura 13 Total 133

7 Preparing DPRs for Development in NE Region

CWC undertakes surveys and investigation to prepare DPRs for development of power generation, irrigation, flood management and water supply.

Number of projects investigated =39 Expected power potential =2,934 MW Expected Irrigation potential =324 Th.ha Number of projects under investigation =10

Monitoring of Water Resources projects CWC carries out monitoring of major and medium irrigation projects to ensure the achievement of physical and financial targets of creatcreationion of irrigation potential.

Sl. State No. of Target Potential CLA/ Grant No. projects potential created up to released up monitored under AIBP March, 2006 to 16-2-2007 (Thousand (Thousand (Rs. in crore) hectare hectare) 1. Assam 11 163.51 69.26 110.72

2. Manipur 3 51.95 0.00 242.85

3. Meghalaya 1 4.78 0.00 4.00

4. Tripura 3 22.25 6.70 49.82

8 Techno economic appraisal of flood management schemes CWC carries out techno economic appraisal of flood management schemes for TAC of the Ministry of Water Resources. S.No. STATE No. of scheme cleared No. of scheme on from CWC which comments sent 1 Assam 31 22 2 Arunachal Pradesh 2 4 3 Manipur 6 0 4 Meghalaya 0 0 5 Mizoram 2 0 6 Nagaland 6 0 7 Sikkim 1 0 8 Tripura 1 0 Total 49 26 Brahmaputra Board 10 9 17

BRAHMAPUTRA BOARD Functions

– Survey, investigation and preparation of Master Plans – Preparation of Detailed Project Reports for identified schemes in water resources projects and drainage development schemes

– Construction of Multipurpose Dams and other works in North-East as approved by Central Government

9 BRAHMAPUTRA BOARD Completed Works (A) Survey, Investigation & Master Plans • Prepared 36 Master Plans for Brahmaputra, Barak & some of their tributaries. • Major recommendations in Master plans – Long term measures ¾Construction of storage reservoir ¾Watershed management ¾Flood forecasting – Short term measures ¾Embankment construction and improvement ¾Anti Erosion (AE) works ¾Drainage improvement 19

LOCATIONS OF MULTI-PURPOSE PROJECTS

10 Major Dams Proposed in Master Plans

– Siang Dam (Siang/ Brahamaputra) – Subansiri Dam (Subansiri) – Dibang Dam (Dibang) – Lohit Dam (Lohit) – Tipaimukh Dam (Barak) – Pagladiya Dam (Pagladiya) – Manas & Sankosh Dams in Bhutan (Manas & Sankosh)

(A) Survey, Investigation &Master Plans (Contd.) DPRs for 5 Multi-purpose projects completed

Siang & Subansiri Projects

¾ DPRs of Single high dams with flood moderation as one of the purposes for each of Siang and Subansari rivers was prepared.

¾ In view of submergence of major towns, Brahmaputra Board decided in favour of cascade development of 3 projects of lesser heights each as Upper, Middle and Lower for each Siang and Subansari rivers.

¾ After initial investigations by Brahmputra Board, the projects on cascade development were handed over to NHPC

11 Tipaimukh Dam •The DPR was completed by Brahmputra Board & project handed over to NEEPCO for contruction Pagladiya Dam •DPR completed, execution taken up by Brhamputra Board. •Construction could not start due to non completion of land acquisition and zirat survey by Govt. of Assam Bairabi Dam •DPR completd and project handed over to Mizoram government for construction.

(A) Survey, Investigation &Master Plans (Contd.)

• Works of DPR of Dibang project partly completed and handed over to NHPC.

• DPRs for 11 Drainage Development Schemes.

12 COMPLETED WORKS Contd….

(B) Execution of Identified Projects (from 1999-2000)

(Central Sector) Anti-erosion & Flood Control projects (3 nos.) • Avulsion of River Brahmaputra at Dholla-Hatighuli Phase-I (for diversion of Debang River to its original course): Completed 2004-05 (Rs.10.47 crore) • Avulsion of River Brahmaputra at Dholla-Hatighuli Phase-II (for diversion of Lohit to its original course): Completed 2004-05 (Rs.4.95 crore) • Protection of Majuli Island from flood & erosion (Immediate Measures): Completed 2004-05 (Rs.5.92 crore)

SATELLITE PLANFORM SHOWING RIVER AVULSION & SHIFTING PROCESS AT CONFLUENCE ZONE OF MAINSTREAMS OF THE BRAHMAPUTRA NEAR SADIYA (TINSUKIA)

Dehang Dibang Dibang Dehang Lohit Lohit

SATELLITE IMAGERY OF SATELLITE IMAGERY OF YEAR 1990 YEAR 2002 26

13 INDEX MAP SHOWING AVULSION OF RIVER BRAHMAPUTRA AT DHOLA-HATIGHULI

TIE BUND PITCHING WITH SAND FILLING BAG AND BAMBOO CRIPS

14 SILTING NEAR RCC PORCUPINE AT DHOLA HATIGHULI

BRAHMAPUTRA BOARD ONGOING WORKS (A) Survey, Investigation &Master Plans Survey & investigation and preparation of 15 nos. Master Plans

DPR for multi-purpose projects 8 nos.

DPR for Drainage Development Schemes 22 nos.

15 ONGOING WORKS (B) Execution of identified projects (Central Sector) (i) Drainage 9 Harang, Barbhag, Amjur, Jengrai, Development nos. Jakaichuk, East of Barpeta, Schemes Joysagar, & Singla in Assam and Kailashahar in Tripura (ii) Multi-purpose 1 no. Pagladiya Dam Project Project (iii)Other Anti- 2 Protection of Majuli Island from erosion & nos. flood and erosion Phase-I Flood Control (Assam) Projects & Anti-erosion measures to protect Kushiabil & Durgajan village at Dimapur from River Dhansiri – South (Nagaland) 31

PAGLADIYA DAM PROJECT

• Sanctioned in January 2001 for Rs. 542.90 crore (1999 price level) • Preparatory works of tender drawing and document, project site, colony roads etc. carried out • Project works held up due to resistance by Project Affected People (PAP) in Bodoland Territorial Autonomous Districts to Zirat Survey (property assessment) of PAP • Bodoland Territorial Council (BTC) have now intimated (Dec. 06) Brahmaputra Board their no objection to the project. • Revised Completion Schedule : 2012-13

16 Central Assistance for Flood Control

• Central Loan Assistance to the Govt of Assam from 1974-75 till March-2000 ¾ Rs 390.94 crore as loan and Rs 10.09 crore as grant- in-aid ¾ Central Loan Assistance discontinued after March 2000. • It was decided to provide funds for critical flood control and anti-erosion works to states • Assistance also provided through Ministry of Development of North Eastern Region (MoDONER) and Planning Commission as Additional Plan Assistance

Task Force For Flood Management/erosion Control

• As per direction of Hon’ble Prime Minister, a Task Force under the Chairmanship of the Chairman, CWC with representatives of concerned states, central organisations and eminent experts was set up by MOWR in August 2004 to look into problems of recurring floods in Assam & neighbouring States, Bihar, West Bengal and Eastern Uttar Pradesh

17 Task Force Recommendations

Sl.No. State Measures (in Rs Cr) Immediate Short-term I Short-term II Total 1 Assam 116.10 382.81 350.00 848.91 2 Tripura 9.53 57.22 25.76 92.51 3 Manipur 11.95 38.50 228.76 279.21 4 Meghalaya 0.79 66.50 12.00 79.29 5 Sikkim 10.00 122.98 64.50 197.48 6 Arunachal Pradesh 9.55 137.97 40.04 187.56 7 Mizoram 5.59 40.05 - 45.64 8 Nagaland - 4.81 - 4.81 9 Brahmaputra Board - 80.00 100.00 180.00 Total 163.51 930.84 821.06 1915.41

FUNDING FOR CRITICAL FLOOD CONTROL & ANTI-EROSION WORKS • A scheme for Rs.150 crore for taking up critical flood control and anti erosion works under immidiate and short term measures in Brahmaputra & Barak Valley in the North Eastern States including Sikkim & North Bengal in State sector was approved in Dec., 2004. Revised EFC Memo amounting to Rs. 225 crore was approved by CCEA during 2006. • Execution is by concerned States and co- ordination by Brahmaputra Board.

18 Hon’ble PM’s announcement

• “The Government will consider establishing a cohesive, autonomous, self contained entity called the Brahmaputra Valley Authority or the North East Water Resources Authority to provide effective flood control, generate electricity, provide irrigation facilities & develop infrastructure. Given managerial and financial autonomy, equipped with top class manpower, and backed by Parliamentary sanction, such a body could be the instrument for transforming the region.”

Proposed North East Water Resources Authority (NEWRA)

• MoWR prepared a proposal for North East Water Resources Authority (NEWRA) in line with TVA & DVC in consultation with States. • Government of Arunachal Pradesh expressed some reservation.

19 Accelerated Irrigation Benefit Programme (AIBP) • In North Eastern (NE) States, most of the schemes are Minor Irrigation schemes. • The scope of AIBP has been extended to include Surface minor irrigation projects in special category states of NE, other hilly states and KBK districts of Orissa since 1999-2000. • Prior to December, 2006 the funding was in the ratio of 3:1 (Centre & State) and 90% of Centre’s share was given in the form of grant and 10 % as loan to be arranged by state with effect from 1.4.2004. • Fund provided as 90% grant & 10% State’s share since December, 2006.

AIBP- Major & Medium Projects - Assam (Potential In Thousand Hectare) PHYSICAL S. Project Name Potential Created Target Created upto No. before AIBP for AIBP 3/2006 1. Pahumara 12.9 1.2 11.7 6.8 2. Hawaipur lift 3.8 0.0 3.8 3.0 3 Rupahi C 5.6 0.0 5.6 5.6 4. Dhansiri 83.4 15.0 68.4 18.5 5. Champamati 25.0 0.0 25.0 10.4 6. Borolia 13.5 0.0 13.5 1.3 7 Bordikarai C 34.0 25.4 8.6 7.4 8. Burhi Dihing 5.0 0.5 4.5 1.9 9. Intg. Irr.Scheme 34.4 25.7 8.7 5.2 in Kollong Basin 10. Kolonga @ 2.7 0.0 2.7 2.9 11. Mod. Of Jamuna 13.7 0.0 13.7 8.5 Irr. TOTAL 234.0 67.8 166.2 71.540

20 AIBP –Major & Medium – Assam (Financial Rs. crore) SN NAME OF PROJECT CUMM. CLA / GRANT RELEASED TILL 31.01.2007

1 Pahumara 6.14 2 Hawaipur LIS 4.96 3 Rupahi LIS 0.65 4 Dhansiri (V) 31.69 5 Champamati (VI) 13.73 6 Borolia 12.53 7 Kolonga (V) (D) 0.50 8 Burhi Dihang LIS 4.22 9 Bordikarai (V) (C) 7.01 10 Mod. of Jamuna Irr. Project (IX) 16.28 11 Int. Irri. Scheme in Kollong Basin (V) 12.98 TOTAL 110.71 41

AIBP- Major & Medium Projects Manipur / Meghalaya / Tripura (Potential In Thousand Hectare) S. Project Name Ultimate Created Target Created No Potential before for AIBP upto AIBP 3/2006 MANIPUR 1. Khuga 15.00 0.00 15.00 0.00 2. Thoubal 33.40 4.00 29.40 4.00 3. Dolaithabi Barrage 7.54 0.00 7.54 0.00 SUB TOTAL 55.94 4.00 51.94 4.00 MEGHALAYA 1. Rangai Valley 4.77 0.00 4.77 0.00 TRIPURA 1 Manu 7.60 0.00 7.60 0.72 2. Gumti 9.80 2.18 5.33 2.52 3. Khowai 9.32 0.00 9.32 2.48 SUB TOTAL 26.72 2.18 22.25 5.7242

21 AIBP- Major & Medium Manipur / Meghalaya / Tripura SN NAME OF GRANT CUMM. CLA/GRANT PROJECT DURING 2006-07 RELEASED TILL 31.01.2007(Rs. crore) MANIPUR 1 Khuga (VI) 32.56 113.59 2 Thoubal 19.98 119.08 3 Dolaithabi Barrage 6.75 10.16 SUB TOTAL 59.29 242.84 MEGHALYA 1 Rongai Valley (VIII) - 4.00 TRIPURA 1 Gumti (V) - 13.95 2 Manu (VI) - 18.57 3 Khowai (VI) - 17.34 SUB TOTAL - 49.86 43

Bottlenecks in the Implementation of AIBP

• Delay in Project completion & creation of irrigation potential. • Inadequate & timely fund allotment to project. • Prevailing law and order problem; shortage of construction material due to lack of unrestricted road communication. • Slow land acquisition process.

22 FUND RELEASED TO NE STATES DURING X PLAN

Funds released during X Plan Under AIBP ( Rs. in Crore) S. State Major& Minor Total No. Mediim Schemes Projects 1 Arunachal Pradesh 0.00 73.80 73.80 2 Assam 34.40 80.29 114.69 3 Manipur 172.10 29.13 201.23 4 Meghalaya 1.50 4.41 5.91 5 Mizoram 0.00 33.37 33.37 6 Nagaland 0.00 32.67 32.67 7 Sikkim 0.00 6.48 6.48 8 Tripura 23.76 67.58 91.34

MinorPROGRESS Irrigation IN MINORDevelopment IRRIGATION under DEVELOPMENTAIBP UNDER during AIBP X Plan DURING X PLAN No. of Potential Fund schemes (in '000 ha) released State till date Approv. Compl. Planned Created Utilised (Rs. in till date crore) Arunachal Pradesh 1168 981 23.4 12.1 8.7 73.80 Assam 143 46 13.4 3.0 0.1 80.29 Manipur 328 328 11.2 11.2 11.2 29.13 Meghalaya 17 10 0 0 0 4.41 Mizoram 114 41 9.4 1.3 0.6 33.37 Nagaland 371 240 16.4 6.5 4.5 32.67 Sikkim 241 162 3.0 1.1 1.0 6.48 Tripura 711 530 18.7 10.8 8.2 67.58 TOTAL 3093 2338 95.5 46.1 34.3 327.7346

23 Impact Of AIBP (MI) in NE States •People have developed confidence for ¾Double / Multi cropping ¾Right type of Irrigation •Socio-economic condition is gradually improving in the area. •Market Expanding •No adverse effect on environment and economy

(As per studies sponsored by ministry of statistics & programme implementation, Govt. Of India for the states of Mizoram, Tripura, Nagaland and Sikkim)

Bharat Nirman Irrigation-targets (In Th Ha) S. States Major & Med. Minor Total No. Irrigation irrigation 1. Arunachal Pradesh 0 22.39 22.39 2. Assam 30.30 42.75 73.05 3. Manipur 51.95 15.50 67.45 4. Meghalaya 0 14.93 14.93 5. Mizoram 0 10.96 10.96 6. Nagaland 0 16.12 16.12 7. Sikkim 0 7.03 7.03 8. Tripura 26.89 54.29 81.18 Total 109.14 183.97 293.11 48

24 Status of Ground Water Exploitation for Irrigation

State Net G.W. Existing Balance Allocation % of balance Availabili Gross annual domestic & annual G.W. ty G.W. G.W. industrial availability for (Thousa draft for Availability req. supply future Irri. ndHam) all uses (Thousand upto 2025 development (Thousa Ham) (Thousand nd Ham) Ham) Arun.Prad 230 0.081 230 0.824 99.6 Assam 2489 544 1944 98 98.0 Manipur 34 0.224 34 2.4 93.0 Meghalaya 104 0.191 104 9.6 90.8 Mizoram 3.95 0.035 3.9 0.079 98.8 Nagaland 32 0.923 31 2.6 95.1 Tripura 197 17 180 20 93.7 49

GW scenario in NE region

• Development of ground water in North Eastern Region is still in nascent stage. • There is ample scope for development but this region being hilly, only 30% of the existing area can be developed. (in the valley) • In the hilly area, the option available is to harvest rainwater through roof tops of buildings. • Harnessing ground water with proper planning and management coupled with roof-top rainwater harvesting, can uplift agro-economic scenario of the region.

25 51

ABSTRACT OF FLOOD MANAGEMENT SCHEMES OF N-E STATES, INCLUDING BRAHMAPUTRA BOARD RECEIVED IN FM-II Dte, CWC SINCE APRIL-2002 AS ON 28/02/07

• Received: 110(49+26+35=110) • Cleared by CWC&Planning Commission: 9 • Cleared by CWC: 49 • Comments sent by CWC: 26 • Schemes deleted by CWC:35 • Major schemes cleared: Dholla Hatiguli (Phase-I, II, III), Majuli Island, Amju

26 DETAILS OF FLOOD MANAGEMENT SCHEMES OF N-E STATES, INCLUDING BRAHMAPUTRA BOARD RECEIVED IN FM-II Dte, CWC SINCE APRIL-2002 AS ON 28/02/07 S.No. STATE Total no. of No. of scheme No. of scheme No. of scheme No. of scheme No. of scheme scheme cleared from cleared from CWC on which deleted under received(col Planning (includes schemes of comments sent examination in 5+6+7+8) Commission and col 4) CWC CWC

12 3 4 5 678 1 Assam 84 7 31 22 31 0 2 Arunachal Pradesh 70 2410 3 Manipur 80 6020 4 Meghalaya 10 0010 5 Mizoram 20 2000 6 Nagaland 61 6000 7 Sikkim 11 1000 8 Tripura 10 1000 Total 110 9 49 26 35 0 Brahmaputra Board* 29 - 10 9 10 0 * Schemes of Brahmaputra Board(29 nos) are included in the above abstract of schemes (110 nos)

Note:Schemes have been delted either due to change of scope of works or non compliance of comments by the State Govt/Brahmaputra Board since more than 1 year. 53

PROJECTS UNDER SURVEY & INVESTIGATION BY NEIC, B&BBO, CWC, SHILLONG.

A. KUNDIL IRRIGATION PROJECT

• States benefited : Assam & Arunachal Pradesh • Benefits envisaged : 38000 ha (GCA) • Estimated cost of S&I works : Rs. 496.17 Lakhs • Proposed date of submission : September,2007 of DPR • Funding Agency : NEC • Status : Preparation of DPR chapters under progress. 54

27 B. NYUKCHARONG CHU H.E. PROJECT

• States benefited : Arunachal Pradesh • Benefit envisaged : 200 MW (Installed Capacity) • Estimated cost of S&I works : Rs. 456.76 Lakhs (including additional S&I work for dam option) • Proposed date of submission : March, 2008 • of DPR • Funding Agency : NEC

• Status : Initial proposal of trench weir changed to 75m high dam necessitating additional Survey & Investigation works.

C. MANAS-SANKOSH-TEESTA LINK CANAL

• States benefited : Assam & West Bengal • Benefit envisaged : Augmentation of water at Farrakka and en-route irrigation • Estimated cost of S&I works : Rs. 571.28 Lakhs • Proposed date of submission : March, 2008 • of DPR • Funding Agency : MoWR

• Status : Aerial survey is required for the reserved forest reaches; approval of Min. of Defence, Min. of External Affairs and Royal Govt. of Bhutan is awaited.

28 WATER RESOURCES DEVELOPMENT PROJECT IN N.E. REGION A. WRD projects in Arunachal Pradesh • States benefited : Arunachal Pradesh • Benefit envisaged : 445 MW and 7.8 MW (Installed Capacity) • Estimated cost of S&I works : Rs. 492.66 Lakhs • Proposed date of submission : March, 2009 • of DPR • Funding Agency : MoWR

• Status : Scope of work changed for the schemes on Tawang Chu from 4 nos. trench weir to a dam, additional S&I works under progress.

WATER RESOURCES DEVELOPMENT PROJECT IN N.E. REGION B. Minor Irrigation Schemes in Mizoram. • States benefited : Mizoram • Benefit envisaged : 4340 ha • Estimated cost of S&I works : Rs. 364.70 Lakhs • Funding Agency : MoWR • Status • I. Kolasib Group : All 8 feasibility reports submitted • II. Champhai Group : 6 out of 15 feasibility reports submitted • III. Serchhip Group : All 18 feasibility reports submitted • IV. Chawngte Group : 10 out of 16 feasibility reports submitted • Proposed date of submission : June, 2007 of balance feasibility reports 58

29 KOLODYNE H.E. PROJECT (STAGE-II)

• States benefited : Mizoram • Benefit envisaged : 550 MW (Installed Capacity) • Estimated cost of S&I works : Rs. 1107.00 Lakhs • (including Stage-I,Stage-II and S&I work for increased dam height of Stage-II) • Proposed date of submission : December, 2007 • of DPR • Funding Agency : Govt. of Mizoram/ NEC • Status: Change in dam height due to navigation aspect and increase power consideration necessitating additional S&I work.

TUIVAWL H.E. PROJECT

• States benefited : Mizoram

• Benefit envisaged : 42 MW (Installed Capacity) • Estimated cost of S&I works : Rs. 410.43 Lakhs • Proposed date of submission : March, 2007 • of DPR • Funding Agency : NEC

• Status: Preparation of DPR chapters under progress.

30 MYNTDU (LESHKA) H.E. PROJECT STAGE-II

• States benefited : Meghalaya

• Benefit envisaged : 100 MW (Installed Capacity) • Estimated cost of S&I works : Rs. 293.75 Lakhs • Proposed date of submission : March, 2008 • of DPR • Funding Agency : MeSEB, Govt. of Meghalaya

• Status: Survey & Investigation works under progress.

TUICHANG H.E. PROJECT

• States benefited : Mizoram

• Benefit envisaged : 60 MW (Installed Capacity) • Estimated cost of S&I works : Rs. 499.68 Lakhs • Proposed date of submission : March, 2009 • of DPR • Funding Agency : NEC

• Status: Survey & Investigation works under progress.

31 TUIPUI H.E. PROJECT

• States benefited : Mizoram

• Benefit envisaged : 40 MW (Installed Capacity) • Estimated cost of S&I works : Rs. 497.04 Lakhs • Proposed date of submission : March, 2010 • of DPR • Funding Agency : NEC

• Status: Survey & Investigation works under progress.

TUIRINI H.E. PROJECT

• States benefited : Mizoram

• Benefit envisaged : 38 MW (Installed Capacity) • Estimated cost of S&I works : Rs. 408.33 Lakhs • Proposed date of submission : March, 2007 • of DPR • Funding Agency : NEC

• Status: DPR at final stage of submission.

32 BRAHMAPUTRA BOARD MASTER PLANS AT DIFFERENT STAGES OF APPROVAL / PREPARATION 1. BHOGDOI 2. GADADHAR 3. BELSIRI 4. KULSI-DEOSHILA 5. BUROI 6. DEPOTA 7. BEKI-MANAS-AIE 8. DHANSIRI (North) DUDHNOI-KRISHNAI 9. BARNADI 10. BRAHMAJAN 11. TIPKAI 12. SANKOSH 13. BARGANG 14. TANGANI 15. TANGANI (BACK)65

MULTI-PURPOSEPROJECTS UNDER INVESTIGATIO BY BRAHMAPUTRA BOARD (BACK)

Project State I. C. Flood cushion Irrigation in MW in MCM in ha.

1. Lohit Arunachal 3000 Yet To be finalised Nil 2. Noadehing Arunachal 75 49 5000 3. JiadhAl Arunachal 50 45 Nil 4. Simsang Meghalaya 130 5. Kynshi stage – i Meghalaya 460 Out fall in Bangladesh 6. Kynshi stage – ii Meghalaya 450 7. Killing project Assam & 50 Meghalaya 135 8. Kulsi Assam & 36 50000 Meghalaya

Total 4251 55000 66

33 DRAINAGE DEVELOLPMENT SCHEMES DPR under Modification Under investigation/ DPR preparation Assam Assam Tripura 1. Badri 1. Ghiladhari1. 1. Sukhsagar 2. West of Barpeta 2. Larsing 2. Dharmanagar 3. Sessa 3. Larua-Jamira-Sessa 4. Rongsai 4. Punir 5. Mora Dikrong 5. Bherekibil 6. Sonai 6. Gelabil Work of DPR preparation 7. Mora-Pichalamukh handed over to Govt. of 8. Pakania Assam : Deroi 9. Namdang 10. Tingrai 11. Sessapathar 12. Pola 13. Ghagra 14. Konwarpur (BACK) 67

ANNEXURE

ALL SLIDES AFTER THIS SLIDE ARE TREATED AS ANNEXURE

34 MAP SHOWING AVULSION OF RIVER BRAHMAPUTRA AT DHOLLA-HATHIGHULI AND DIVERSION OF RIVER DIBANG TO ITS ORIGINAL COURSE

–

DHOLA HATIGHULI

PAGLADIYA DAM PROJECT, ASSAM • Sanctioned in January 2001 for Rs. 542.90 crore (1999 price level) • Revised Cost (Jan.2004 price level) - Rs. 1069.40 crore (due to price escalation, change in design and additional requirement) • Works carried out (from 2001) – Pre-construction survey, investigations, studies, design, drawings etc. – Taking possession of land (956 ha) for Resettlement & Rehabilitation (R&R) purpose – Construction of project roads, offices, etc. – Preparation of technical specifications & tender document – Pre-qualification of contractors for main works • Expenditure till December,06 : Rs.32.64 crore 70

35 PROTECTION OF MAJULI ISLAND FROM FLOOD AND EROSION • DPR for protection of Majuli Island (Rs.86.56 crore) prepared by Brahmaputra Board, cleared by CWC in 2003

• The scheme consists of 3 phases ¾ Phase-I (Rs.41.28 crore) 9Permeable screens (RCC porcupines) 9Repair of road cum embankment (50 Km) 9Construction of new embankment (18 km) 9Works of Bank revetment, noses of land spurs 9Physical model study : – Survey & data collection – Laying of model

SATELLITE PLAN FORM OF MAJULI ISLAND ON THE BRAHMAPUTRA RIVER 2002

36 73

PROTECTION OF MAJULI ISLAND FROM FLOOD AND EROSION • Phase-II (Rs.18.28 crore) – Permeable spur to be constructed (in specified reaches) – Model studies updating based on works on Phase-I and Phase-II and studies and recommendation thereof.

• Phase-III (Rs.27.00 crore) – Construction of 10 land spurs of various lengths based on the findings of model studies in Phase-I, Phase-II and updating on works of Phase-III.

37 PROTECTION OF MAJULI ISLAND PROGRESS OF PHASE-I WORKS (contd.) Up to December, 2006 Rs. in crore) Main components of construction works Physical Financial progress progress Construction of noses of existing land 21% 0.30 spurs Construction of RCC porcupine permeable 85% 10.11 screens in the reach from Sonowal Kachari Gaon to Kandulimari Raising & strengthening of embankment 3.52 (a) Upstream of Kamalabari 31% (b) Downstream of 88% Kamalabari Miscellaneous works e.g. survey & data 1.70 collection, salary of work charged staff etc.

Total 15.6375

PROTECTION OF MAJULI ISLAND PROGRESS OF PHASE-I WORKS (contd.)

Total works awarded :Rs.30.15 crore Under process :More than Rs.15 crore

Model Study: (a) Survey & data collection – complete (b) Laying of physical model – complete (c) Trial run has been started

38 FLOOD SCENARIO Contd…

Sl. State Geographical Flood Prone Area No. Area (mha) (mha)

1 Arunachal Pradesh 8.37 0.12** 2 Assam 7.85 3.15* 3.82** 3 Manipur 2.24 0.08

4 Meghalaya 2.24 0.02* 0.10** 5 Mizoram 2.11 0.05** 6 Nagaland 1.66 0.01** 7 Tripura 1.05 0.33 Total 25.52 3.58* 4.51** * As assessed by Rashtriya Barh Aayog ** As reported by State Govt. 77

FLOOD DAMAGE (1953 to 2005 )

Sl. States Average/ Area Population Human Total No. Maximum/ affected affected lives damages Year (mha) (million) lost (Rs. (nos.) crore) 1. Assam Average 0.925 2.745 43 84.814 Maximum 3.82 12.298 251 753.03 (Year) (1988) (2004) (2004) (2002) 2. Arunachal Average 0.047 0.087 13 45.499 Pradesh Maximum 0.207 0.510 47 505.57 (Year) (2003) (1993) (1993) (2004) 3. Meghalaya Average 0.012 0.264 5.56 11.644 Maximum 0.095 4.77 25 210.34 (Year) (1987) (1983) (1985) (2004) 4. Manipur Average 0.02 0.067 2 3.62 Maximum 0.080 0.730 7 51.81 (Year) (1989) (1989) (1980) (1986)

39 FLOOD DAMAGES (1953 to 2005) Contd…

5. Mizoram Average 0.091 0.010 4 19.30 Maximum 0.541 0.053 16 51.811 (Year) (1993) (1976) (1993) (1997) 6. Nagaland Average 0.002 0.014 Nil 2.697 Maximum 0.009 0.075 Nil 19.55 (Year) (1993) (1993) (1993) 7. Tripura Average 0.040 0.153 7 8.473 Maximum 0.330 0.700 54 80.05 (Year) (1963) (1984) (1984) (1993) 8. Sikkim Average 0.005 0.024 14 6.69 Maximum 0.020 0.100 107 28.42 (Year) (1984) (1983) (1983) (1988)

Flood Management Measures in the N.E. Region (Up to March 06)

SN State Area Embankm Drainage Village Town/ benefited ent channel raised/ Village (mha) (km) (km) protect protect ed ion works( works( no) no) 1 Arunachal Pradesh 0.055 6.324 4.447 17 - 2 Assam 1.642 4464.1 850.6 - 694 3 Manipur 0.132 577 166 1 38 4 Meghalaya 0.001 112 - 2 8 5 Mizoram - - - - - 6 Nagaland 0.632 10.519 - - 8 7 Tripura 0.033 141.74 95.23 - 11 8 Sikkim 0.017 101.81 64.86 - 18 Total 2.512 5413.493 1181.137 20 777

40 Completed Flood Management Measures (Up to March 04)

State Embankmen Drainage Town/Villag Area t (Km) channel e protection benefited (Km) works (no) (mha) Arunachal 7 9 18 0.003 Pradesh Assam 4459 851 681 1.636 Manipur 500 126 1 0.130 Meghalaya 116 - 8 0.001 Mizoram - - 0 - Nagaland - - 0 - Tripura 140 11 11 0.026

TOTAL 5222 997 719 1.79681

Flood Forecast Performance

– A level forecast is considered reasonably accurate if the difference between the forecast and the corresponding actual observed river level lies within +/- 15 cm. - On an average, 2000 level forecasts at various places in NE region are issued with 97.6% accuracy during the monsoon season every year. - In 2006, 1790 level forecasts were issued with an accuracy of 98.3%.

41 DRAINAGE DEVELOLPMENT SCHEMES

(DETAILED PROJECT REPORTS COMPLETED ) Assam 1. HARANG (under execution) – (Rs.30.49 crore) 2. BARBHAG (under execution) – (Rs.7.23 crore) 3. JENGRAI (taken up for execution) – (Rs.1.49 crore) 4. EAST OF BARPETA (taken up for execution) (Rs.1.34 crore) 5. JOKAICHUK (taken up for execution) – (Rs.2.96 crore) 6. JOYSAGAR (taken up for execution) – (Rs.2.13 crore) 7. SINGLA (taken up for execution) – (Rs.3.54 crore) 8. AMJUR (under execution) – (Rs.14.15 crore) 9. DEMOW (under examination in CWC) – (Rs.14.10 crore) Tripura 1. KAILASHAHAR (taken up for execution) – (Rs.4.18 crore) 2. RUDRASAGAR (recently cleared by CWC) (Rs.10.88 crore)

(BACK)83

STATUS OF THE CRITICAL FLOOD CONTROL & ANTI-EROSION SCHEMES IN B&B VALLEY UNDER STATE SECTOR (Rs. in crore) 2006-07 2004- 2006-07 No. of Total 2005-06 Release Sl. 05 Proposal State Sche allocati Release d upto No. Releas under mes on d 20.2.200 ed process 7 1 Assam 35 81.00 9.30 30.240 5.44 32.87 2 Aruna. Pra. 4 15.03 4.000 11.21 3 Tripura 3 15.04 1.50 4.437 6.83 4 Nagaland 1 4.33 1.200 2.70 5 Manipur 2 7.60 2.115 5.80 6 Mizoram 1 4.50 0.60 2.160 3.44 7 Sikkim 1 9.00 2.160 6.44 8 Meghalaya 1 4.50 0.675 2.18 9 W.B.(North) 3 9.00 1.800 6.08 1.01 Total 51 150.00 11.40 48.787 47.94 36.06 84

42 OTHER WORKS OF CWC

• Conducted morphological studies of river Brahmaputra & Barak by Remote sensing techniques in 2004.

• Field survey for morphological studies of Brahmaputra is continuing.