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Challenges of Water Quality Management: Case of Peripheral rivers in Dhaka Mega City, presented by Reba Paul, Executive Secretary, BWP and  Azharul Haq, Former Managing Director, Dhaka WASA at World Water Week 2010
 

Challenges of Water Quality Management: Case of Peripheral rivers in Dhaka Mega City, presented by Reba Paul, Executive Secretary, BWP and Azharul Haq, Former Managing Director, Dhaka WASA at World Water Week 2010

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Challenges of Water Quality Management: Case of Peripheral rivers in Dhaka Mega City, presented by Reba Paul, Executive Secretary, Bangladesh Water Partnership and Azharul Haq, Former Managing ...

Challenges of Water Quality Management: Case of Peripheral rivers in Dhaka Mega City, presented by Reba Paul, Executive Secretary, Bangladesh Water Partnership and Azharul Haq, Former Managing Director, Dhaka WASA at World Water Week 2010.

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    Challenges of Water Quality Management: Case of Peripheral rivers in Dhaka Mega City, presented by Reba Paul, Executive Secretary, BWP and  Azharul Haq, Former Managing Director, Dhaka WASA at World Water Week 2010 Challenges of Water Quality Management: Case of Peripheral rivers in Dhaka Mega City, presented by Reba Paul, Executive Secretary, BWP and Azharul Haq, Former Managing Director, Dhaka WASA at World Water Week 2010 Presentation Transcript

    • Presented by Reba Paul, Executive Secretary, BWP and Azharul Haq, Former Managing Director, Dhaka WASA Challenges of Water Quality Management: Case of Peripheral rivers in Dhaka Mega City Eye on Asia Day at World Water Week 2010 Organised by Asian Development Bank 8 th Sept, 2010, Stockholm, Sweden
    • Area: 348.57 sq.km Population: 12 million. Estimated future Population: 21 Million by 2025 Expanded area: 1000 sq km Demographic Information of Dhaka City Southern part
    • River systems in and around Dhaka city Five Rivers Peripheral : Buriganga,Dhaleswari, Turag, Balu, Sitalakhya and Tongi, Padma (Ganga), Jamuna (Brahmmaputra) and Meghna Connected to The five p eripheral r ivers are receivers of stormwater, municipal and industrial wastewater and sewage from Dhaka City
    • Causes of Water Quality in Dhaka Rivers
      • Indiscriminate disposal of untreated industrial effluents, municipal and domestic waste and sewage
      • Low coverage of sewerage facility (Only 30%)
      • Unabated pollution, encroachment and fill up of canals, lakes, water bodies and wetlands by the land grabbers and industries.
      • Reduced water flow in the rivers during dry season.
      • Siltation and reduced self purification capacity of the rivers.
      • Weak Institutions
      • Lack of coordination among development agencies.
    • Challenges of Water Quality Management
      • Population growth
      • Rapid urbanisation and industrialisation
      • Migration of people from rural to urban
      • Limited land for expansion.
      • Lack of urban planning
      • Limited sewerage system.
      • Old pipe network
      • Lack of fund
      • Lack of leadership
      • There are 300 outfalls of domestic and industrial effluents.
      • Nine outfalls are the major polluters.
      • Effluents are discharged into the rivers indiscriminately without any treatment.
    • Major Sources of Pollution Water Pollution Encroachment of rivers and water bodies
    • Sate of rivers in Dhaka
    • Pagla STP (only sewage treatment plant) has capacity to treat 10% of generated sewage of Dhaka city. It has an installed capacity of treating 0.12 Mm3/d, which is very less than the present city load. Pagla STP Pagla STP
    • Water Quality Profile: Turag-Buriganga-Dhaleswari Tongi Khal Buriganga R . Turag R. Lakhya R. Source: IWM Dissolved Oxygen (DO) level falling to zero; Aquatic life under severe threat Distance DO Level Tongi R.Bazar
    • BOD Loadings for All Industrial Clusters Industrial effluent BOD accounts for around 50-60% of the Total Effluent BOD Total load Industrial load Domestic load at outfall Domestic load retained Source: IWM
    • Impacts of poor water quality
      • Affecting human health, environment, economy, ecosystem and biodiversity.
      • Put serious threat to city water supply and security.
      • Added cost to water treatment.
      • Holding country from achieving MDGs related to water supply, sanitation and health.
    • City Water Supply and Demand Source: DWASA+IWM Present Demand : 2470 MLD Present Supply: 1930 MLD 83% comes from GW and 23% comes from 4 SWTPs Future Water Demand: 4990 MLD by 2030
      • Groundwater depletion
      • 2-3m/year lowering of WT
      • No further abstraction from upper aquifer (100-200m) is viable.
      • 45 DTWs in deeper aquifer are in operation and another 50 DTWs have been planned.
      Source: DWASA + IWM
    • Policy makers (Water Resources, Industry and Shipping Ministers and Local Government) and Experts discussing water security issues in Dhaka city. High Level Dialogue on 'Surface Water: the Most Potential Future Alternative for Water Supply in Dhaka City’ . Participation of all stakeholders from government and non-government organizations, minisers, member of parliament (MPs) , international organizations, private agencies, academic institutions, print and electronic media and individual water experts.
      • All medium and large industries need to install ETPs.
      • All small industries to shift to identified industrial clusters.
      • All industries should adopt cleaner production technologies to reduce generation of pollutants
      • The river beds need to be dredged to remove polluted soil and sludge.
      • Removal of river encroachment.
      • Shifting of Hazaribagh tanneries to Hemayetpur.
      Necessary measures to control pollution of water
      • Rehabilitation of the existing STP and installation of five planned STPs.
      • Buriganga flow augmentation from large rivers.
      • Rehabilitation and extension of the existing sewerage network
      • Rehabilitation and expansion of the Pagla STP
      • Demand management to reduce overuse or wastage of water
      • Implementation of new Sewage Treatment Plants according to DWASA Master Plan
    • Government’s Recent Initiative
      • Task Force formed by the Government.
      • Rivers declared as ‘Ecologically Critical Areas’.
      • Decision on shifting tannery industry outside the capital.
      • Cleaning of Buriganga and Turag has already started and helped launching water bus servces.
      • Court has directed deployment of law enforcing agencies to prevent dumping of wastes into the rivers.
      • Ministry of Environment has directed all the polluters to install Effluent Treatment Plants (ETP).
    • Good Start BUT! Ultimate success of cleaning the rivers depends on disposal of dredged materials in suitable place and control of industrial and other pollution.
    • Five new Sewage treatment plants are an immediate need in Dhaka and Tongi to reduce river pollution . Cost of 5 sewage treatment plants is about $600 million Source: DWASA Diabari STP Uttarkhan STP Baidertek STP Kamrangirchar STP Pagla STP Tongi STP
    • Thank You for your kind attention!