Workshop New Life For Urban Streams II Strategies For Revitalizing The Jardas/Barcarena Stream

Transcription

1 Workshop New Life For Urban Streams II Strategies For Revitalizing The Jardas/Barcarena Stream

2 Challenges of the WFD application to Portugal - the basin approach and the institutonal framework; Lisbon Metropolitan Area - the Tagus estuary, the coastal area and the streams in the north bank; The Jardas / Barcarena stream and watershed Issues to develop

3 National and transboundary river basins Âmbito Ge Várias Minho Lima Douro Cávado Ave Mondego Vouga Tejo Lis Guadiana Sado Mira Arade

4 the new institutional framework institutional INAG: Water Institute coordination at national level (and international agenda) ARH: Hydrographic Region Administration or River Basin District Administration regional/local level: planning and implementation tasks ARH with administrative and financial autonomy New Hydrographic Region Councils ARH do TEJO integrated management of terrestrial and coastal areas

5 The ARH mission institutional Implementation of a river basin management concept Focused on the protection, valorisation and sustainable management of water resources water quality water quantity information Regional entities, administrative and financial autonomy, with full competencies on: Licensing and surveying water uses; Promoting water resources requalification and fluvial management Developing economic analyses of water uses Raising funds (including establishing and collecting taxes) Assuring law enforcement Preparing river basin plans (transboundary issues in cooperation with INAG) Implementing the programs of measures for water management Promoting flood control, drought plans and emergency control Establishing monitoring programs Inventoring and managing water protection areas and water bodies for human consumption

6 extreme events Floods Directive 2007/60/EC on the assessment and management of flood risks (23 October 2007) flood risk assessment flood hazard maps and flood risk maps flood risk management plans, within the river basin management plans

7 Challenges Integration of the water policy with other policies (e.g. definition of agreed environmental objectives) Developmet of methodologies for addressing ecological quality and monitoring programmes Introduction of cost-effectiveness practices in water resources protection and management Approval and enforcement of the economical and financial regime Climate change integration on the water resources planning Ability to define and manage priorities, establishing short, medium and long-term targets Fostering stakeholders participation Dealing with challenging objectives, incresed complexity.

8 Tagus river basin Âmbito Geográfico do Projecto Várias Minho Lima Douro Cávado Ave Mondego Vouga Tejo Lis Guadiana Sado Mira Arade

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10 Location

11 Sintra Arrábida Fonte Atlas da AML, Geografia Física

12 Metropolitan Area of Lisbon - North bank - The streams Sintra

13 Metropolitain Area of Lisbon - issues related with water/rivers/streams The problems/issues: water quality urban encroachment groundwater uses and contamination flood risks increase in traffic and transportation network land use planning and management processes Potential: landscape values identity, symbolic values strategic location navigation, riverfront activities microclimate influence natural resources and habitats natural and cultural heritage.

14 METROPOLITAN AREA of LISBON Intense urban growth since the sixties strong polarity of Lisbon for employment and urban transport

15 Administrative Structure: Région Lisbon and Tagus Valley CCDR Métropolitaine Area of Lisbon AML The Municipalities CM

16 METROPOLITAN AREA of LISBON Land use Areas of special interest for nature conservation

17 METROPOLITAN AREA of LISBON Regional Plan for Metropolitan Area of Lisbon - PROT-AML Environmental Regional Structure

18 Municipalities - Municipal Master Plan - PDM PDM Lisboa_Planta de Ordenamento Estrutura verde PDM Oeiras - Planta de Ordenamento Cascais - proposta de corredores verdes

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20 Rapid process of urban growth in the XX s Cacém em 1893 Cacém, anos 40 Cacém na actualidade Cacém, anos 80

21 Imagens da ribeira das Jardas no Cacém antes da intervenção Polis Reabilitação da ribeira das Jardas Cacém - programa Polis

22 URBEM Environmental and Landscape Rehabilitation of streams of the Estoril Coast Project developed for

23 Objectives the establishment of land use and environmental guidelines for the riparian corridors, and minimizing flood risks in the surrounding urban areas; to develop new concepts for river management and flood protection based on a catchment approach, alternative to traditional engineering works such as channelization with concrete and regular cross-sections; to increase water infiltration and detention in adequate recharge areas; to use riparian vegetation to restore bank vegetation and habitats; to enhance urban adjacent areas, creating park-land, recreation areas and open space for leisure and amenities with increased scenic value; to promote trails and paths along the streams for leisure and environmental education; to involve public and private local agencies to promote a better quality of life, create jobs to support leisure and environmental education.

24 Hydrological Data Catchment Stream Catchment Catchment Stream Area Catchment (km2) area (km2) Length Length (km) Perimeter Maximum Perimeter Height Maximum (m) (km) height in t (m) Slope Slope Q10 (m3/s) Q10 m3/s Q100 (m3/s) Q100 m3/s Barcarena Barcarena 33,6 19,2 45, , Population Data Catchment Area (km2) Km2 Inhabit Inhabit Rate of of variation % Pop. Dens. (hab/km2) Pop. Dens. (hab/km2) * Urban Area area % % Barcarena 46, , ,2

25 Existing and future urban areas

26 Degree of naturalness of river corridor Legend: Very low: mostly artificial (extensive concrete, sraightened, urban encoachment up to channel margins, etc) Low: - Medium: - High: channel mostly unstraightened, most banks unrocked and vegetated, with native species

27 T2 URBEM EXISTING CASE STUDY SELECTION Catchment land uses

28 Landscape and cultural heritage

29 Some topics to be developed: City-People-River - Assessing the success of the Polis intervention at Jardas/Cacém (URBEM project - Retrofit urban neighborhoods for stormwater management Modelling issues for river restoration Ecological issues - riparian vegetation restoration Reinventing the riverfront...