WSUD Maintenance: a European Perspective Perspective Lyon, France European Nina Cossais, PhD student WSUD Maintenance: a Maintenance: WSUD 1 22 March 2017 – Stormwater Victoria WSUD Seminar Location of Lyon, France Lyon Perspective European Source: Melbourne Museum WSUD Maintenance: a Maintenance: WSUD 2 22 March 2017 – Stormwater Victoria WSUD Seminar PhD context Prof. Anne Honegger Prof. Denis Martouzet Two labs: University of Tours Perspective European One “local government”: Three years financial support: (March 2015 – March 2018) WSUD Maintenance: a Maintenance: WSUD 3 22 March 2017 – Stormwater Victoria WSUD Seminar The metropolis of Lyon, France INHABITANTS living in 59 municipalities SEWER combined sewer stormwater WASTEWATER Perspective TREATEMENT PLANTS European DETENTION or INFILTRATION STORMWATER BASINS SOAKAWAYS WSUD Maintenance: a Maintenance: WSUD 4 22 March 2017 – Stormwater Victoria WSUD Seminar A ”multi-layers” administration France « Auvergne-Rhône Alpes » Region Department of Rhône 2015 Amalgamation 1969 - Urban Community of Lyon City of Lyon = municipality Perspective European The “one thousand layers administrative cake” Source : www.femmeactuelle.fr WSUD Maintenance: a Maintenance: WSUD 5 22 March 2017 – Stormwater Victoria WSUD Seminar A ”multi-layers” administration France « Auvergne-Rhône Alpes » Region Department of Rhône 2015 Amalgamation Metropolis of Lyon City of Lyon = municipality Perspective European The “one thousand layers administrative cake” Source : www.femmeactuelle.fr WSUD Maintenance: a Maintenance: WSUD 6 22 March 2017 – Stormwater Victoria WSUD Seminar Context • Sewer system – Combined sewer (85%) – Partially saturated – 21 July 2015 decree: limits the combined sewer Max 20 d/yr or 5% collected water overflowing Perspective European Infiltration basin in Décines, March 2016 Swale, Garibaldi Street in Lyon, June 2016 WSUD Maintenance: a Maintenance: WSUD 7 22 March 2017 – Stormwater Victoria WSUD Seminar Problem • Since 1990, WSUD to: – limit overflowing – recharge water tables – cool the city Perspective – improve living conditions Yet, reluctance to WSUD’s adoption persists European Rank barriers: operation and maintenance WSUD Maintenance: a Maintenance: WSUD 8 22 March 2017 – Stormwater Victoria WSUD Seminar Questions • How are stormwater assets maintained? • By who? • What are the main difficulties? • What should we do about it? Perspective European WSUD Maintenance: a Maintenance: WSUD 9 22 March 2017 – Stormwater Victoria WSUD Seminar ”Pervious City” field workshops Perspective European Localization of visited sites and facilities in Lyon metropolis area. Production : N.Cossais. Design : SAFEGE Suez Consulting. Source : Lyon metropolis Field workshops in March 2015 and June 2016 WSUD Maintenance: a Maintenance: WSUD 10 22 March 2017 – Stormwater Victoria WSUD Seminar Field workshops: first findings Perspective European Stormwater detention ponds - Portes des Alpes - Saint-Priest, Lyon, France WSUD Maintenance: a Maintenance: WSUD 11 22 March 2017 – Stormwater Victoria WSUD Seminar Perspective European Lights in a trench WSUD Maintenance: a Maintenance: WSUD 12 Porte des Alpes, Lyon,22 MarchFrance, 2017 March – Stormwater 2015 Victoria WSUD Seminar Field workshops: first findings • Main results –Most important barriers to WSUD’s adoption: • Demarcation issues: tasks, costs and responsibilities • Technical aspects (pollution, trash, mosquitoes, sustainability, esthetics) Perspective –Sewer workers are unhappy with the evolution of European their profession “On-the-job” immersions with maintenance teams and roads designers WSUD Maintenance: a Maintenance: WSUD 13 22 March 2017 – Stormwater Victoria WSUD Seminar Field workshops: first findings • Main results –Most important barriers to WSUD’s adoption: • Demarcation issues: tasks, costs and responsibilities • Technical aspects (pollution, trash, mosquitoes, sustainability, esthetics) Perspective –Sewer workers are unhappy with the evolution of European their profession “On-the-job” immersions with maintenance teams and roads designers WSUD Maintenance: a Maintenance: WSUD 14 22 March 2017 – Stormwater Victoria WSUD Seminar Anthropological approach – Inductive procedure – Participant observation – Learn about Perspective what is “not said” European WSUD Maintenance: a Maintenance: WSUD 15 22 March 2017 – Stormwater Victoria WSUD Seminar Anthropological approach First findings • General context – Increase in the number and the complexity of stormwater facilities – Stagnating or decreasing budgets Perspective – Demarcation issues • Source control measures European – Still seen as “new” (swales) – Mixed perception (sand covers, swales) – Little consideration of water needs and opportunities when planning green spaces WSUD Maintenance: a Maintenance: WSUD 16 22 March 2017 – Stormwater Victoria WSUD Seminar Demarcation issues Perspective GL GL GL European GL Roadside in Bron (Lyon, France), April 2015 Key: maintenance and/or control Green spaces department (municipality) Roads direction – Trees and Landscape department Metropolis of Lyon Cleaning department Roads department (« Great Lyon ») WSUD Maintenance: a Maintenance: WSUD 17 Sanitation department 22 March 2017 – Stormwater Victoria WSUD Seminar Demarcation issues • WSUD maintenance complexity –List of tasks for each type of WSUD –Nature of tasks: specialty or not –Department in charge –S=Sanitation Dptmt, G=Green Spaces Dptmt Perspective S G European Cleaning of a screen inside the sewer, March 2016 Mowing in Confluence, Lyon, France, May 2016 WSUD Maintenance: a Maintenance: WSUD 18 22 March 2017 – Stormwater Victoria WSUD Seminar Cleaning Sanitation Department Green Spaces Service Roads Direction Department Soakaways C1 - - Surface and storm drains Soakage trench cleaning - - (when needed) C1 S1 C2 Hydraulic structures maintenance - Trash collection (when needed) grassy (depending on dirt and requirement) G1 + Mowing (1 to 4 times/yr) Swales S2 C2 / G1 E2 Hydraulic structures cleaning or G2 vegetated flushing Pruning C1 (when needed) (about 1 to 2 times/yr) (herbs, shrubs, trees) C2 G3 Perspective Weeding (when needed) G4 Watering Buried basins C1 S1 - - European S1/S2/C2/J2 1st adv. for centralized systems : V1 simple O&M enclosed - Fences and signs maintenance - - Open- (MicroMégas) air S3 basins Self-monitoring open to the C1 C1/C2 S1/S2/S3 - public C2 G1/G2/G3/G4 C1 / G3 R1 Pervious pavement R2 - - Pavement repair Pavement maintenance R2/S2 WSUD Maintenance: a Maintenance: WSUD 19 22 March 2017 – Stormwater Victoria WSUD Seminar Cleaning Sanitation Department Green Spaces Service Roads Direction Department Soakaways C1 - - Surface and storm drains Soakage trench cleaning - - (when needed) C1 S1 C2 Hydraulic structures maintenance - Trash collection (when needed) grassy (depending on dirt and requirement) G1 + Mowing (1 to 4 times/yr) Swales S2 C2 / G1 E2 Hydraulic structures cleaning or G2 vegetated flushing Pruning C1 (when needed) (about 1 to 2 times/yr) (herbs, shrubs, trees) C2 G3 Perspective Weeding (when needed) G4 Watering Buried basins C1 S1 - - European S1/S2/C2/J2 « Picking up waste, I am V1 enclosed - telling you this- honestly, I - Open- Fences and signs maintenance air S3 don’t want to do it » basins Self-monitoring open to the C1 C1/C2 S1/S2/S3 - public C2 G1/G2/G3/G4 C1 / G3 « It was made in1999-2000. R1 Pervious pavement R2 - - Pavement repair Pavement maintenance I think it was only once cleaned up »R2/S2 WSUD Maintenance: a Maintenance: WSUD 20 22 March 2017 – Stormwater Victoria WSUD Seminar What should we do about it? • On-going work – On-site measures to assess hydraulic and climatic performance – Internal workshops on pollution, climate change and service levels Perspective – Internal courses on stormwater management – Costs and benefits assessment European – Populating GIS with location of WSUDs – Asset hand over – WSUD guidelines for urban designers WSUD Maintenance: a Maintenance: WSUD 21 22 March 2017 – Stormwater Victoria WSUD Seminar What should we do about it? • Needs –Define a systematic demarcation of tasks • Who pays what and at what scale? • Who is responsible for what? –Work together with green spaces departments Perspective –GIS? –Asset audit guidelines European • Perspectives – Implementing WSUD asset management – Build an ambitious (but realistic) project to work together with executive managers and local politicians WSUD Maintenance: a Maintenance: WSUD 22 22 March 2017 – Stormwater Victoria WSUD Seminar WSUD Maintenance: a European Perspective Lyon, France Perspective [email protected] European Photographs and illustrations : N. Cossais WSUD Maintenance: a Maintenance: WSUD 23 22 March 2017 – Stormwater Victoria WSUD Seminar.