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.

1. 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

2. 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

3. 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

7. Major Sources of Pollution Water Pollution Encroachment of rivers and water bodies

8. Sate of rivers in Dhaka

9. 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

10. 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

11. 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

13. 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

15. 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.

18. Government’s Recent Initiative

20. 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.

21. 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

22. Thank You for your kind attention!