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Government Of Assam Dibrugarh District

PROFILE OF DIBRUGARH WATER RESOURCES DIVISION

INTRODUCTION:

The Dibrugarh Water Resources Division aims to plan and execute different flood and erosion management works related to the river Brahmaputra and its many tributaries and sub tributaries, in the two districts in upper Assam namely Tinsukia and Dibrugarh. The division also maintains some drainage structures located in these two districts.

ORGANISATIONAL STRUCTURES

This Water Resources Division, Dibrugarh has the following organisational structure –

  1. Head of the District (Dibrugarh and Tinsukia) as Divisional Head is the Executive Engineer, Dibrugarh W. R. Division, Dibrugarh

                                   Sri Deep Pegu   -         Ph: 9435033641

  1. Under the Executive Engineer, 4 (Four) Nos. of Sub-Divisions are there in the two districts. The Heads of the Sub-Divisions are Assistant Executive Engineers.

Dibrugarh East W. R. Sub-Division, Dibrugarh

Sri Rajesh Baruah                          -              Ph: 9435746920

Dibrugarh West W. R. Sub-Division, Dibrugarh

Sri Harish Baruah                           -              Ph: 9435030043

Naharkatia W. R. Sub-Division, Dibrugarh

Sri Rajeevananda Buragohain    -              Ph: 9435745333

Doomdooma W. R. Sub-Division, Tinsukia

Sri Dinesh Buragohain                 -              Ph: 9435057715

  1. Under the Assistant Executive Engineer, the officers and staffs deputed in the field as Sectional In-charge of the embankment section and different schemes and Anti Erosion works executed by division are as follows:
  1. Assistant Engineers
  2. Junior Engineers
  3. Sub-Engineers
  4. Sectional Assistants
  5. Khalasis

Apart from the district level officers and staffs, the higher authority under which this division falls are as follows:

  1. The Chief Engineer, Water Resources Department, Chandmari, Guwahati
  2. The Addl. Chief Engineer, Upper Assam Zone, W. R. Department, Dibrugarh.
  3. The Superintending Engineer, Nagaghuli Maijan Protection Circle, W. R. Department, Dibrugarh.


CONTROL ROOM

Control rooms are setup at district level in two locations for collecting and disseminating data and information in two districts which are as follows:

  1. At Dibrugarh SS-V
    1. The In-Charge of the Control Room is Sri Bhupen Phukan, Sub-Engineer, Grd-II,

Ph – 8812072330

Office Phone : 03732321195

  1. At office of the Doomdooma Sub-Division, Tinsukia
    1. The In-Charge of the Control Room is Sri Prabhat Boro, Junior Engineer,

Ph – 8011087738

Further, the W. R. Department has a Central Control Room at office of the Chief Engineer, W. R. Department, Guwahati as state level. Our District level Control Room is always in touch with the state level Control Room and Control Room of Deputy Commissioner, Dibrugarh.

RULES REGULATIONS AND CIRCULAR ETC.

                              Regular circulars and instructions are issued and transmitted to every Field Officer and Sectional Officer has been served for smooth running of the departmental works as well as maintenance of flood.

IMPACT OF THE DISASTER IN THE CONTEXT OF THE DEPARTMENT TYPES OF DISASTERS:

Two types of disasters are faced by the Water Resources Department, in its departmental structures-

  1. Natural Disaster: Natural disasters which periodically occurred are Flood, Erosion, Sloughening along bank, Seepage, Artificial flood due to heavy Rain, etc. . Moreover, Congestion of the drainage channel are the other few natural disaster which are to be encountered and mitigated by the W.R. Department.
  1. Manmade Disaster: Damage due to the domestic animal, like cattle, buffalos, and other wild animals and manmade cutting, water logging, congestion of drainage channel due to garbage, erosion etc.

CRITICAL AREAS OF THREAT:

               The critical areas that come into threat whether it is natural or manmade disaster are:

i)            Physical Infrastructure

ii)           Connectivity and Communication

iii)          Lack of adequate competency based training.

                              The most vulnerable areas under the Dibrugarh W.R. Division in Dibrugarh and Tinsukia Districts have been identified after joint verification of officials of Dibrugarh W.R. Division and Hon’ble MLA s. After discussion with the higher authority and as per priority list, schemes were prepares and submitted to concern authority for approval and sanction of fund.

IMPACT TO FLOOD & EROSION MANAGEMENT STRUCTURE OF W. R. DEPARTMENT

                              Due to a disaster generally Engineering and Structural Unit of this W. R. division are affected. The Engineering and Structural Unit of this department are Embankment / Dyke, Spurs, Anti-Erosion Works, Porcupine Screens, Sluices, Culverts, Drainage System, Gauge Sites, Rain gauge Station etc. Every year, flood and heavy rain causes damage to the Embankment, Spurs and Anti-Erosion works. During flood, the water may spill over the embankment in a vulnerable location. Most of the existing embankments are constructed during the period in 60’s and 70’s and therefore, have already have outlived their utility. No major upgradation works have been taken in comprehensive basis, however, on priority basis segmental upgradation and bank protection works are taken up to tackle the problem of flood and erosion. Sometimes in a weak zone, breaches and cuts occurs causing heavy flood and inundation in the nearby areas. Failure may occur due to the sloughening, depression and rain cuts. Heavy erosion, threatens the river bank in a locality and sometimes erosion washes away the embankment also causing flood. Heavy seepage beneath the embankment may cause sloughening and depression to the structure.

                              Due to the flood and erosion, the Spurs are also affected. The nose of the spur always has to bear tremendous water pressure of the flood water. Therefore, scouring occurs beneath the nose of the spur. As a result, the boulder works at the nose of the spur get displaced and deformed. Due to the whirl-pool at the downstream of the spur, bank erosion are takes place due to flood.

                              Scouring also damages the boulder works of revetment & apron of the Anti-Erosion measures, sluices etc. and may also critically damage the structures.

                              Drainage channels are also affected by the flood. Heavy congestion and obstruction occurs due to the siltation and hyacinth or garbage causing reduce of the section and carrying capacity of the drain. Moreover, human interference of temporary structural blockage of the drain garbage disposal etc. also cause of drainage congestion spread in urban area.

                              Due to the disaster like heavy flood and earthquake leakage, seepage and cracks may develop in the departmental structure - Embankment, Spurs, Sluices Culverts etc.

HAZARD AND VULNERABILITY SCENARIO:

In the Dibrugarh and Tinsukia district:

Flood and erosion are the prevalent hazards in the two districts. From available records, some major floods were experienced due to the river Brahmaputra in the following years –

1954, 1962, 1966, 1972, 1974,1978, 1983, 1986, 1988, 1996, 1998, 2000, 2004, 2007, 2012, 2014, 2015 and 2016 and 2017.

Some of the instances of floods in Dibrugarh and Tinsukia district are described below –

1950 – After the 1950 Assam earthquake Dibang river started pushing southwards raising the possibility of flooding and washing away of Dibrugarh. There after embankments and protection works were built to protect the area.

1992 – In Saikhowa Protection Bund Ph-I was breached due to flash flood of river Noa-Dehing at Chumoni gaon on 29-03-1992 at 9.45pm. Immediately after the breach NH-37 & NH-52 were overtopped and breaches occurred in many places of NH-52. the approach road of the bridge over Dholla river on NH-37 was eroded away due to onrush of water through Dholla river disrupting communication between Tinsukia to Dholla town as well as to Arunachal Pradesh. Further 10186.08 hectares of land of flooded under Doom-dooma Revenue Circle, damaging crops, household and road infrastructure. This flood has damaged electrical installation at Hahkhati Nepali, Hahkhati Tea Estate, Dirakmukh N.C, Hahkhati Forest Village, Powali Pathar, Dighal Mesaki Bokapathar

1997 – The combined flow of Lohit and Dibang Rivers called Brahmaputra was flowing along the northern side of Saikhowa Reserve forest. Since the year 1992, a part of this combined flow, followed a course along the southern side of Saikhowa Reserve forest, with increasing magnitude in successive years and joined the existing river channels of Dhola, Dangori and Dibru in the downstreram. The offtaking flow is called Ananta nalla. With passage of time, Ananta nalla went on increasing in magnitude. The problem of bypassing of discharge through Anant nalla, became very acute during 1997. By that time, the entire flow of Lohit river and the major part of Dibang river was observed flowing through Ananta nalla. The high floods of 1997, caused wide spread floods devastation in Tinsukia and Dibrugarh districts, affecting 49 villages, due to submergence. The combined flow of Ananta nalla continued and met river Brahmaputra, through Dibru river outfall and caused intense erosion at Rohmoria upstream of Dibrugarh. Acute erosion was observed in the year 1997 in about a 9 Km stretch on the southern bank of the Brahmaputra covering Bali Jan tea Estate in the upstream upto Oakland Tea Estate affecting lives property and fertile land.

2012- In September 2012 high and unprecedented flood had occurred in river Kundil and its sub-tributaries in Sadia sub-division due to excessive rainfall in upper catchment. About 80% of the landmass in Sadia remained under water for many days. Since some major construction works were going on in Arunachal Pradesh huge silt load in the form of earth, pebbles etc. were carried by the flash floods. The river Kundil carried the silt from the foothills of Arunachal Pradesh near Paya in Luhitpur district in A.P. and entered through Kolia Deuri Mishing gaon by eroding the high bank flowing through the low lying areas from Tupsinga village to Nasai village and took a shorter path near Doompathar village. Also the rivulets Hajo and Paya got blocked by the debris and changed their courses towards Kundil through a lateral course of ‘Ata Nalah’ and ‘Epi Nalah’.  Similarly huge silt load came through Diphu nallah too along with flood water. Due to the additional runoff flood spill occurred in river Kundil leading into great devastation in whole of Sadia Civil Sub-division . Heavy erosion took place in the concave bends of river Kundil.

2015- In the month of September 2015, the Buridehing experienced highest flood level of 104.15M exceeding the ever-recorded H.F.L of 1998. The entire both bank embankment of Buridehing suffered heavy leakage, seepage, boiling etc and situation was critical. But due to timely execution of emergency works by the field officials of W.R. Department with the help of local people the probable eventualities were prevented.

2016 – During the period of 2016, heavy flood has been observed in Dibrugarh district and its adjoining areas. The ever destructing flood has damaged more than numerous numbers of cultivated land and in some places overtopped by River Buridehing at our departmental embankments has been observed.

2017 - In the month of July 2017, bank erosion observed at various places like Bogoritolia, Rohmoria. Severe erosion has occurred in other places too. The both bank of Buridehing river has suffered from leakage, seapage, boiling, slump down of the crest of the embankment causing destruction in the departmental structure. The officials of W. R. Department were continuously monitoring the hazard scenario. Considering the severity of erosion in Buridehing River, one unified project with the nomenclature of “Integrated Water Resources Management of Buridehing Basin” has been prepared and submitted to the Flood Management Directorate of CWC, New Delhi after getting recommendation from the state Technical Advisory Committee & regional office of CWC Shillong. The project envisages raising and strengthening of existing 174.88 Km & new construction of 10.60 Km with protection measures for 20.74 Km at 37 reaches and the estimated cost of the project is Rs. 658.023 Cr.

OBJECTIVES OF THE DEPARTMENTAL MANAGEMENT PLAN:

  • To be prepared to recover from major flood and erosion, sloughing, slumping or river bank migration.
  • To look after the working of the drains of the division so that drainage congestion does not happen during monsoon period because of heavy rains or back flow of rivers.
  • To ensure draining out of accumulated rain water from the country side through sluice gates.
  • To maintain regular hydro graphic / hydro meteorological data.
  • To safe guard and make available necessary materials, supplies and equipment.
  • To reduce the risk of disaster caused by human error, deliberate destruction.
  • To ensure the division’s ability to continue operating after a disaster.

Identification of vulnerable reaches:

  • Every vulnerable reaches or location are identified and enlisted by the flied staff engaged in the different section of the division.

Procurement and storage of flood fighting materials:

  • Flood fighting materials which are generally required for tackling any emergency are procured and stocked in the designated storeroom of the Water Resources Department. The flood fighting materials like empty cement bags, bamboos, porcupine members etc are procured beforehand and are stored at the stored rooms set up at strategic locations. The requirement as per W.R. guideline has been placed before C.E., W. R. Deptt and flood drill estimate with M&R estimate has been submitted. The details of the storage location and materials are given below:-

Sl. No.

Location of store

Capacity

Material stored

UNDER DOOMDOOMA W. R. SUB-DIVISION

1.

At W.R. colony store, Rupai, Doomdooma

60 cum

E.C bag, Geo-bag

2.

At W.R. colony store campus

600 sqm open space

Geo-Bag

3.

At Dholla I.B., Dholla

20 Cum

EC bag

4.

At site camp chumoni

20 Cum

EC bag, Geo-bag, WN sheet

UNDER NAHARKATIA W.R. SUB-DIVISION

5.

At Tipling Sub-Divisional Store

500 sqm open space

EC Bag, Geo-Bag, WN Sheet.

6.

At site camp Konwar Gaon

400 sqm open space.

Geo-Bag, Filter media sheet

7.

At site camp Jagun Gaon

300 Sqm open space

Geo-Bag, EC Bag, Filter media sheet, WN Box

NEAR DIVISIONAL OFFICE OF DIBRUGARH W. R. DIVISION

8.

Divisional Store

Adequate Space

Geo-Bag, EC Bag, Filter media sheet, WN Box

REMEDIAL MEASURES TAKEN BY THE DIVISION DURING PREVIOUS DISASTER –

               As per Rastriya Barh Ayog’s recommendation following measures have been taken by the division after occurrence of flood and erosion in previous years (since 1950) –

Identification of vulnerable reaches are done in the pre-monsoon period and Flood Drill estimateis prepared as per prevailing norms incorporating the Details of requirement of man and materials to fight the ensuing flood. After getting approval to the estimate from the govt. flood fighting materials such as Empty Cement Bags, Bamboos, RCC Post, 8g Wire are procured through contractors and kept ready at Central Store, Sub-Divisional Stores as well as critical sites to fight any disaster. Also some pre-monsoon measures are taken up based on the condition of the dyke and the vulnerability. In the pre-monsoon season, Raising and Strengthening of embankment has been done as per design section of the embankment. The design of the embankment depends on the category of river in which embankment is situated. The design specification is different for different category of river. The free board and coverage of hydraulic gradient line are maintained as per design high flood level or observed high flood level.

  • Sluices and Culverts:                          

                              Sluices and Culverts are also checked and maintained for smooth running during the flood season.

  • Drains:

The drains which are under the jurisdiction of the Dibrugarh W.R. Division are cleared before the monsoon. Even during the flood season also, congestion of drain is cleared by time to time and thus, water logging is minimized in the different areas particularly in the Dibrugarh town.

  • Control Room of Dibrugarh W. R. Division, Dibrugarh:

            Control Room of the WR start functioning from May to October to collect hydrological data from CWC and to delivered the information to all concerned agency for necessary action.            

Duties at the WR Control Rooms are entrusted to staff to run round the clock as per roaster system from May to October during the flood season. Rainfall data, water level data are collected from the rain gauge sites and water level gauge sites telephonically by the control room in charge from the field staff in the morning and evening which data is immediately passed to the concerned officials for further necessary action. Real time data as well as forecast data are also collected from the control room of Central Water Commission at Dibrugarh by the departmental control room staff and transmitted accordingly. Any other relevant information such as likely damages during floods are collected and informed to EE/AEE concerned immediately. Decisions are taken by discussing with higher authorities regarding preventive measures to stop damages and necessary actions are taken accordingly. The district civil administration and police authorities are kept aware of the latest flood situation by sending messages at regular intervals of time.

Sectional Officers are instructed to give strict vigil at the different reaches and section of the embankment and other structures of the department round the clock during the flood season.          

Any damage occurred in the structure are immediately informed by the sectional officer to the Assistant Executive Engineer and Executive Engineer. Then Executive Engineer forward it to the higher authority if necessary.

Minor damages are generally meet up in the site through the immediate instruction given by the Assistant Executive Engineer and Executive Engineer to the office staff. In case of major damage, the information is immediately transmitted to the higher authority and try to recoup it as per instruction of the same. 

Surveys are conducted to assess the damages occurred if any to the flood control structures in the post disaster period. A cost appraisal statements are prepared against the damages done for submission to the government. As per instruction and approval from government, estimates are prepared for restoration works of the damages are made accordingly.

These estimates are then discussed in the District Disaster Management meeting for consideration to be included under SDRF fund for execution. The damaged sites are then visited and verified by the officers of the civil administration along with the officers of the department. On getting approval from DDMA and State Disaster Management agency the works are taken up under SDRF head.

STANDARD OPERATING PROCEDURE (SOP):

As a natural disaster flood fighting department, this department has already follows some Standard Operating Procedure in different situations and event. Some SOP are already maintained by this division are as in the following events.

Information collection and dissemination procedure.

  1. In case of Water Level rises and crosses the danger level.
  2. Cost appraisal and damage assessment.
  3. Preparation of Estimates.

CAPACITY BUILDING

As the Water Resources Department, itself inherently a technical department, the staffs at the upper level are recruited in technical nature. Junior Engineer, Assistant Engineer, Assistant Executive Engineer, Executive Engineer all have the educational background of technical. Further, technical training are provided to the field staff of Sectional Assistant through the Departmental Training Centre at Guwahati, in a regular batch by batch manner in every year. Now a days, some officers are also provided higher training in the different locations and institute in the state or outside the state to smooth maintenance and execution of schemes as well as to fight against the natural disaster.

CITIZEN ENGAGEMENT

Our field staff are in a regular touch with the Gaon Bura and other prominent members of the village or nearby areas of the departmental structure of scheme. Sometimes committee of local people or NGO are also participated or engaged in the different works for helping in maintaining and execution of the works. They also help in providing information time to time in case of any emergency.

RELIEF AND REHABILITATION

Though this department does not directly deal with the relief and rehabilitation matter, but our departmental staff give assistant to the District Administration in any relief and rehabilitation matter related to our departmental schemes for work.

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HIGHEST FLOOD LEVEL (IN M) FROM 1980 TO 2017 OF RIVER BRAHMAPUTRA AT DIBRUGARH PERTAINING TO DIBRUGARH W. R. DIVISION, DIBRUGARH440.07 KBswf-image