FAQ

POSSIBLE QUESTIONS related to Social and Environmental aspects

  1. 1
    What are your estimates of the extent of land acquisition and number of people affected (both: i) affected but not displaced; and ii) displaced and have to be relocated) with Stage I and Stage II?

    For Stage 1 the number of people affected varies from 3,000 for the flexible option. For Stage 1 the amount of land acquisition required is about 95 ha for the flexible line. People affected will either need to be resettled or will continue to be vulnerable to flooding. Estimates for Stage 2 have not been completed.

  2. 2
    What are your estimates of the extent of land acquisition and number of people affected (both: i) affected but not displaced; and ii) displaced and have to be relocated) with Stage I? for full flood embankment (earthen) option Vs the limited embankment + concrete wall option as proposed?

    Estimates have not been made in this way. This will determine after completion of inventory and socio-economic survey planned to be implemented through a consultancy team from University of Colombo

  3. 3
    What is the package of compensation provided by the Government for the affected people?

    It will be decided when preparation of RAP together with all stakeholders including affected people

  4. 4
    Will the affected people receive compensation before the interventions are started on ground?

    It will decide at the finalization stage of RAP in consultation of stakeholders and affected people

  5. 5
    What will be the process and procedure used by the Government to assess, evaluate, approve and pay compensation package?

    It will adopt all possible means and ways to find special scheme for this project to offer more attractive compensation package

  6. 6
    What are the advantages and disadvantages of earthen flood embankments Vs concrete walls?

    Concrete walls can be constructed in smaller spaces, and therefore fewer people would be affected. They are somewhat more difficult to construct and unfamiliar to Sri Lanka, so may require international contractors for designing and construction.

    Earthen embankments need a much larger land area (more than 3 times as much) and so more people are affected. They are simpler to construct and are well known in Sri Lanka, so local construction contractors can do them.

  7. 7
    What will be the funding available from the World Bank under CRIP and CRIP II and for what activities?

    It has been agreed by both World Bank and Asian Infrastructure Investment Bank (AIIB) to cofounding for CRIP II.

  8. 8
    What will be the location wise considerations in the final construction of embankments vis a vis flood walls?

    The embankments are only possible in areas where a 50 foot space is available and about 30% of the total length is fall in to flexible.

    The concrete wall type is mainly for the flexible line very much closer to the river banks.

  9. 9
    Can you explain the type of works propose for each GN divisional area for flood mitigation and management of local floods/excess water retain after floods due to structures proposed as mitigation measures?

    Not in detail at this time, it will cover under detail designing stage. However, all local floods, drainage etc, will be managed with a combination of embankments, gates and pump houses constructed in the surrounding areas where necessary. The detailed design will try to minimize pump use where possible.

  10. 10
    What will be the flood damage if the proposed interventions are delayed or not implemented at all?

    With an average annual expected damage of LKR 7,800 million, this would be approximately the level of damage annually if the project does not go ahead.

  11. 11
    How do you plan to reach out to the people benefitted and affected by these interventions before the start of surveys and construction and during construction?

    Project is planned to launch a comprehensive communication campaign to provide all information on proposed project, educate people and, communicate various stakeholders, political authority, government officials, private sector people and people in the target area.

  12. 12
    Who will lead that outreach and what support will be required from various levels of the Government to implement it?

    National and district level awareness programme are conducted by the Project Management Officer and divisional and village level awareness programme will be conducted by a team of consultant deployed by University of Colombo.

  13. 13
    What are the potential site specific negative and positive environment impacts by the proposed interventions and how will you propose to mitigate such negative impacts with location specific solutions?

    The EIA will be completed by hiring a consultancy team and they will identify mitigation options.

POSSIBLE QUESTIONS related to Technical Aspects

  1. 1
    What are the packages of proposed interventions to safeguard people against floods?

    ombination of:

    1) Flood embankments from Hanwella to the river mouth, with gates and pumps where necessary for protection and draining of tributaries.

    Embankment will establish as flexible line in between 0 to 50 m stretch of river ban depending on available space, this embankment will protect people and properties from 1:50 return period.

    2) Upper basin reservoirs to capture flood waters from the upper basin and raise the total level of protection to 1:100 year return period

  2. 2
    What is the basis for the final proposals?
    1. a) Protection from floods
    2. b) Minimizing the displacement of people due to the flood protection scheme
  3. 3
    What analytical work and field investigations were carried out to understand the flood problem and arrive at the proposals?

    1) Detailed hydro-logical analysis

    2) Cross sectional surveys

    3) Flood modelling based on two types of flood model

  4. 4
    Who were involved in the analytical work and studies?

    Consulting Team

    Counterpart staff (staff of Irrigation Department and Sri Lanka Mahaweli Authority)

  5. 5
    What is the basis, the major alternative options considered, and merits and demerits of alternatives that led to the choice of the proposed interventions as of now?

    Many options were considered, both structural and non-structural

    • Embankments
    • Flood diversions
    • Reservoirs as multipurpose reservoirs to store excess water to make use in dry period, divert to other basin, provide drinking water, supply irrigation water and increase recharge.
    • Changes to operations of existing reservoirs
    • Upper catchment land management
  6. 6
    What do you mean by level of protection or return period of floods? Can you explain this concept in layman’s language?

    A 1:50 year event is one that would happen once every 50 years on average. A 1:100 year event, is one that would happen once every 100 years on average. However, as this is a statistical definition, such an event could happen at any time.

  7. 7
    Will my house and land fully protected from floods in future after these works are completed? If not, why?

    No. For the period of time that only embankments are protecting your house and land (prior to construction of the reservoirs) if a flood event higher than 50 years return period occurs there will be flooding.  Similarly, once reservoirs are constructed, it is possible that a flood event greater than a 1:100 year return period can occur. However, in both cases, the extent of flooding and amount of damage to homes and land will be less than without the flood protection.

  8. 8
    Explain why the works are separated as Stage 1 and Stage II Implementation plan and the activities packaged into Stage 1 and Stage II?

    It is necessary to construct both the embankments and the reservoirs because neither can protect to the 1:100 year return period on their own. Constructing embankments take much less time than constructing reservoirs, so having two stages allows a good level of protection fairly quickly.

  9. 9
    You are proposing construction of reservoirs upstream? Is it possible to detain flood water by judicious operation of the existing CEB reservoirs without constructing new reservoirs?

    No, it is not. 1) reservoirs are not of sufficient volume to have an impact, 2) the CEB reservoirs cannot be drawn down (water levels) quickly enough in the event of a flood forecast.

  10. 10
    Have you studied the reservoir operation option and consulted the CEB?

    Yes

  11. 11
    What will be the positive impact of combination of reservoir operation + construction of new upstream reservoirs + flood embankments and walls?

    The positive impact of the construction of new upstream reservoirs and flood embankments will be protection from all flood events up to the 1:100 year return period. In addition the reservoirs will be developed as multi-purpose, being able to enhance water resources for interbasin transfers to dry zone basins, bulk water supply for domestic and industrial water, hydropower generation.

  12. 12
    Have you investigated the impact of the Ambatale weir on the flooding upstream? If yes, what was

    Yes. It raises flood levels and this has been factored into the embankment heights.

  13. 13
    Have you studied the impact of the sand bar at the river mouth on the flooding?

    Yes. There is no impact

  14. 14
    Have you investigated the impact of the new port city and the associated tidal dynamics on discharging water to the sea and any negative impact on flooding?

    No. It is too far away for impact.

  15. 15
    Have you taken in to consideration of possible change in river flow behavior (velocity etc) due to proposed structures and how would impact on river banks in main river and tributaries due to backwater effect?

    These issues have been studied to find solutions

  16. 16
    What are the structural proposal proposed for mitigation of such issues?

    Details will be worked out at detail design preparation stage.

  17. 17
    Have you investigated the impact of clearing bottlenecks and removal of obstructions on the flooding?

    Yes. It has become evident that this is not an issue.

  18. 18
    Have you investigated the possibility of diversions to other river basins? For example, to Mahaweli from the upper reaches of the catchment and to Maha Oya from the middle reaches?

    Yes, this is part of Stage 2.

  19. 19
    Have you analyzed the impact of the land use change over past couple of decades on the flooding? And on base flow of the river?

    Yes. The land use management of the upper basin is reasonably good and therefore not a significant factor in flooding.

  20. 20
    How will you improve the minor flood protection schemes? What will be the options?

    The ‘minor flood protection works’  will be incorporated into the design of the Kelani Flood Mitigation Strategy and will no longer be “minor’.

POSSIBLE QUESTIONS related to Management and funding

  1. 1
    What is the tentative start and completion dates for Stage 1 and Stage II?

    Implementation of Stage 1 could start as early as the end of 2018. Construction could be completed as early as end of 2021. Implementation of Stage 2 could start as early as and of 2019. Construction could be completed as early as 2025.

  2. 2
    What are your estimated costs of stage I and Stage II?

    Stage 1 costs range between LKR 37,060 to LKR 42,670 million for the flexible line. These costs are a combination of construction and land acquisition and compensation.

    Stage 2 costs have not been determined. Stage 2 is being analysed now.

  3. 3
    What are the estimated costs and benefits and ERR (Rough figures at this moment will be sufficient?

    For Stage 1:

    flexible line: LKR 42,670 million, benefit LKR 7,800 million, EIRR 19%

    For Stage 2: not yet determined

  4. 4
    What type of floods (return period) will control with proposed structures under phase I and if any flood occurs more than proposed return period what are the control measures proposed as feasibility options to protect the structures constructed under phase I and what structural measure to drain excess water over topped due to the flood?

    During construction the embankments will be protected with geotextiles and other forms.

    For larger return period events there will be areas of the embankment designed to be slightly lower as overflow sections.

  5. 5
    Do you have to think of a firm institutional arrangement to operate and maintain the new flood protection infrastructure on day to day basis, at the onset of floods and during flood events? How do you link with communities effectively during floods and for O&M of the flood protection infrastructure?

    Not at all, all the operation, regulation and maintenance will be done by the ID. However, requirement for computerized system for integrated reservoir operation and flood management is currently discussing.

  6. 6
    The Government is now enacting a new Flood Protection Ordinance? Are there any specific recommendations that need to be factored in the new Ordinance in order to maximize the O&M and benefit from these interventions in Kelani and other basins in future?

    Do not allow people to settle or resettle in the unprotected areas through new legislation and O&M standing orders.