1. ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE Dr. Jochen Scheerer Biologist NEW CONCEPTUAL APPROACH TO WATER MANAGEMENT FOR ECO - DISTRICTS

2. ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE  ASEPMA is a Catalan engineering company working in the field of water management, water treatment and is specialised in the reuse of non potable water.  Since its beginning in 2003, ASEPMA has offered its services to a great number of clients coming from the field of public administrations all kind of industries as well as private customers like architects, promoters, etc.  Our services include the whole range of tasks related to the management of water cycle beginning with consultancy, project design, installation and maintenance and control of treatment facilities for non potable water.  ASEPMA works nationally (Spain) and also internationally.  Among our clients : City of Barcelona, City of Tarragona, Catalan Water Agency, BASF, Bayer, ArcelorMittal, Mall Plaza Group, Spanish Ministry of Defence,….

3. 1.- The Issue 2.- The Problem 3.- Introduction 4.- New conceptual approach 5.- Examples 6.- Study Case INDEX ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE

4. The Issue ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE Wallonia: -Water supply 80 % from groundwater Catalonia: - Water supply 70 % from dams Water management

5. The Issue ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE Image: gencat Image: www.xcitingclub.es Image: City of Barcelona Main drinking water supply for Barcelona

6. The Problem ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE Image: ibl news Image: City of Barcelona Situation April 2008

7. The Problem ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE 22.000.000,00 €/ month Imagen: City of Barcelona Imagen: EFE Emergency supply May 2008

8. The Problem ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE What has this to do with the situation in Wallonia?

9. The Problem ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE Source: European Environment Agency Wallonia has the same water explotation index as Catalonia ! You just don’t see it easily!!!

10. Water: A chemical compound with special characteristics. Management: Activities to accomplish desired goals and objectives using available resources efficiently and effectively. Eco- District:Urban planning aiming to integrate objectives of sustainable development. Introduction 1. What we are talking about? ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE

11. - Water is an universal solvent - Water has the second biggest heat capacity of all known substances - Water is the basis of life - Water is H2O Introduction

12. ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE Introduction

13. ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE Current urban water cycle: Source: City of Barcelona Introduction

14. Current concept of water usage: ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE Introduction

15. Toilet Washing Cleaning Plants Drinking an cooking Shower Dishwashing Domestic consumption average in Walonia: 110 liters/per/day Usage Introduction ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE

16. Consumption in toilet tank : 25 liters Consumption in shower : 40 liters Consumption in bathtub: 200 liters Introduction ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE

17. Introduction Eco districts Energy efficiency Water efficiency Reducing heat island effect Increase of biodiversity Resilience ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE

18. Water scarcity occurs where there are insufficient water resources to satisfy long- term average requirements. It refers to long-term water imbalances, combining low water availability with a level of water demand exceeding the supply capacity of the natural system. Water-scarcity can be defined by the water exploitation index (WEI). Wei divides the total water abstraction by the long term annual average (LTAA) resource Introduction Water Scarcity

19. The price of water  Drinking water supplied to consumers in Walonia: approx. 4,28 €/ m 3 This corresponds to an approximate price of 0,0042 € per liter of drinking water, supplied to the final point of the domestic consumption, including urban drainage and treatment of waste water! Is that cheap or expensive?!  Bottled drinking water : between 0,70 and 80 € per liter ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE Introduction

20. ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE A new approach Concept of diversification of our water sources

21. Drinking water Reclaimed water HUMAN COSNUMPTION PERSONAL HYGIENE TOILET IRRIGATION GREY WATER BLACK WATER TREATMENT AND REGENERATION WASTEWATER Alternative source 1. Treated an reclaimed waste water ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE A new approach

22. ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE A new approach Alternative source 1.1. Grey water usage

23. ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE Precipitations Charleroi: aprox. 790 l/ m2 x a; 200 days/ a A new approach Alternative source 2. Rainwater

24. ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE A new approach Alternative source 2. Rainwater

25. A new approach ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE Concept of decentralized water

26. A new approach ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE Over dimensioning of centralized sewer systems

27. Location: Castellbisbal (Catalonia) Collecting area: Roof 1.800 m 2 Water use: Irrigation and street cleaning Tank capacity: 25 + 20 m 3 Tank material: PRFV Equipment and installation cost: 29.900€ (without building works) ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE Examples Extrapolation Location: Charleroi (Wallonia) Precipitation: 793 mm/ m 2 x a Efficiency: 85 % Rainwater harvesting: 1.213m 3 / a Usage: WC flushing for 97 People during 1year Amortisation: approx. 6 years* (* considering 4,28 €/ m 3 drinking water)

28. ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE Examples

29. Location: Tarragona (Catalonia) Water use: Irrigation of 6000 m2 of green area in a public park Capacity: 24.000 liters/day Treatment system: 1.Septic tank 2.Total oxidation with fixed bed 3.Vertical wetland + UV ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE Examples Water Savings: 8.760 m 3 / a = Yearly drinking water demand of 218 people in Walonia

30. ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE Examples Smart Park Tabacalera, Tarragona, Spain

31. ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE Case Study ECO District Barcelona: Total Surface: 10.00 m 2 Resident population: 1.200 Non resident population: 600 Green areas: 29,5 % Houses: 30,0 % Ofices: 10,0 % Public service areas: 10,5 % Streets and pavements: 20,0 % Source: City of Barcelona Conceptual water management design: -Decentralised grey water treatment and reuse for WC flushing -Rainwater harvesting and reuse for irrigation -IN SITU rainwater infiltration

32. ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE Case Study Current water managementNew approach using rain and grey- water (extensive treatment) Drinking water consumption63.500 m3/ a40.362 m3/ a Water Costs139.701 €/ a121.883 €/ a Energy consumption59.202 kWh/ a45.827 kWh/ a Spill to public sewer62.391 m3/ a37.253 m3/a Investment costs in rainwater drainage (15 year amort.) 13.164 €/ a10.167 €/ a Total anual costs152.865 €/ a132.050 €/ a Water savings compared to conventional management 023.139 m3/ a Energy savings comared to conventional management 013.375 kWh/ a Spill reduction compared to conventional management 025.138 m3/ a

33. ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE Reflections -Water scarcity often is not very obvious until it becomes a real problem. -Management of water has to consider both quantity and quality criteria. -Alternative water management including decentralised systems and diversification of water source is not more expensive than traditional water management. -Alternative and decentralised water management reduces significantly drinking water consumption and spill to waste water treatment plants.

34. ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE Reflections -Alternative and decentralised water management reduces significantly drinking water consumption and spill to waste water treatment plants. -Today water management is not a technical problem, rather a conceptual one. -Smart water management needs to consider in every case the particular circumstances of the project. -Drinking water, like energy is a precious resource, however commonly undervalued due to a supposed easy and unlimited access and it´s relatively low cost.

35. ECO-QUARTIERS: ENJEUX ET OPPORTUNITES POUR LA WALLONIE www.asepma.com Thank you for your attention!