{"id":6918,"date":"2024-11-17T10:38:35","date_gmt":"2024-11-17T10:38:35","guid":{"rendered":"https:\/\/varosieso.hu\/2024\/11\/17\/the-urban-rain-in-lyon-local-regulatory-environment-strategy-development-and-institutional-functioning\/"},"modified":"2024-12-04T17:02:54","modified_gmt":"2024-12-04T17:02:54","slug":"the-urban-rain-in-lyon-local-regulatory-environment-strategy-development-and-institutional-functioning","status":"publish","type":"post","link":"https:\/\/varosieso.hu\/en\/2024\/11\/17\/the-urban-rain-in-lyon-local-regulatory-environment-strategy-development-and-institutional-functioning\/","title":{"rendered":"The Urban Rain in Lyon: Local regulatory environment, strategy development and institutional functioning"},"content":{"rendered":"

In the framework of the Urban Rain project, representatives of the partner municipalities took part in a study visit to Lyon from 8 to 11 September 2024. In contrast to previous study visits, the main focus was on the local regulatory environment, strategy development and institutional functioning of two institutions – the Agence de l’Eau Rhone M\u00e9diterran\u00e9e Corse (Rhone-Mediterran\u00e9e-Corsica Water Authority) and the M\u00e9tropole de Lyon (Lyon M\u00e9tropole). We also visited two good examples of water management on site visits to the Jardin Jacob Kaplan and Rue Garibaldi, during which the delegation was joined by the President of the professional organisation ADOPTA. ADOPTA provides professional support around water management issues to municipalities, investors, designers, contractors and provides a common platform in France for the development of sustainable, environmentally friendly and resilient water management practices.<\/p>\n<\/div>

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Rhone-Mediterranean-Corsican Water Authority<\/strong><\/h3><\/h1><\/div>
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In France, there are 6 water authorities, according to the river basin districts. The water authorities are public bodies with financial autonomy: their budget is made up of water charges collected in the river basin district and affecting all users.<\/span> They are responsible for defining the main water management policies for the river basin and for directly recycling the water charges collected for water management subsidies and investments. The organisation operates in a democratic, parlement-style way, through representative mechanisms: the water charges and the main development guidelines are voted on for 6 years.<\/span> Currently, the main orientations are to protect and restore natural waters, to support climate adaptation and to use urban nature-based solutions for water management. <\/p>\n

Key lessons learned:<\/h5>\n<\/div>
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    the basin-wide approach<\/p>\n<\/div><\/li>

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    the overall strategy<\/p>\n<\/div><\/li>

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    the recycling of water charges to water management projects<\/p>\n<\/div><\/li>

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    commitment at state level but still decentralised water management<\/p>\n<\/div><\/li><\/ul>

    Municipality of the Lyon agglomeration<\/strong><\/h3><\/h1><\/div>
    <\/span><\/div>

    The organisation is made up of 59 municipalities and certain tasks that cover the whole territory, such as building regulations, water management, transport, are managed at this level.
    \nWe met with the Department of the Chief Architect (“Directorate of Planning and Territorial Strategy”) and the Department of Water Management, and first of all we learned about the regulatory methods for stormwater management. They basically use similar regulatory tools to municipalities in Hungary, but they are more stringent, comprehensive in their approach and more committed to adapting to climate change.<\/p>\n<\/div>

    Good examples<\/h5>\n<\/div>
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      The Coefficient Pleine Terre, which determines the amount of green space that is required on a plot of land and which is connected to the ground. It ranges from 10% in densely built-up areas to 50% in suburban areas, and green areas must be at least 4×4 m – whereas in Hungary green roofs or grass-grid parking areas can be counted as a percentage, thus avoiding the really valuable 100% ground-connected areas.<\/div><\/li>
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      \n

      Establish water protection zones along floodplains, small surface watercourses, valuable aquifers: ban underground parking, define a buffer zone from built-up areas, ban all construction.<\/p>\n<\/div><\/li>

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      Determination of the water retention rate for a given size of rainfall, given environment, depending on the location, for 30 years (45 mm) of rainfall – e.g. higher altitudes have a higher water retention obligation. Strict control of solutions when issuing building permits, complete refusal of permits if inadequate surveys and studies have been carried out, education and technical support for owners and investors in particularly risky areas.<\/span><\/p>\n<\/div><\/li>

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      \n

      Breaking the rules can result in a financial penalty, demolition or even imprisonment!<\/p>\n<\/div><\/li>

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      Breaking the rules can result in a financial penalty, demolition or even imprisonment!<\/div><\/li><\/ul>
      Main lessons learned<\/h5>\n<\/div>
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        Agglomeration-level thinking<\/div><\/li>
      • <\/i><\/span>
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        cooperation between the specialised offices (the Water Management Department provides the technical background for the Chief Architect’s Department on this subject, e.g. in connection with urban development plans, regulations, building permits)<\/p>\n<\/div><\/li>

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        Strict regulation<\/p>\n<\/div><\/li>

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        and that we already have the basic tools, but there is plenty of room for improvement<\/p>\n<\/div><\/li><\/ul>

        Jardin Jacob Kaplan<\/strong><\/h3><\/h1><\/div>

        In a densely built-up part of the city, the municipality bought land among condominiums built by private investors as a brownfield development and turned it into a park – condominiums were only allowed to be built on this condition. Under the school next to the park there is a 100 m3 cistern where small amounts of rainfall (15 mm) are stored and reused for future irrigation and to run the fountain in the park.<\/p>\n

        A the park area has huge drainage strips (green+silt), where the roofs of the surrounding apartment buildings drain the heavy rainwater (20-year average, 60 mm), which silt up in 3 days. In addition, surface pools have been created as floodable areas to which water is discharged from the gravel bar. A <\/span>In the event of a rainfall event above the 20-year average, rainwater is discharged to the public sewer through the overflow.<\/span><\/p>\n<\/div>

        In a densely built-up part of the city, the municipality bought land among condominiums built by private investors as a brownfield development and turned it into a park – condominiums were only allowed to be built on this condition. Under the school next to the park there is a 100 m3 cistern where small amounts of rainfall (15 mm) are stored and reused for future irrigation and to run the fountain in the park.<\/p>\n

        A the park area has huge drainage strips (green+silt), where the roofs of the surrounding apartment buildings drain the heavy rainwater (20-year average, 60 mm), which silt up in 3 days. In addition, surface pools have been created as floodable areas to which water is discharged from the gravel bar. A <\/span>In the event of a rainfall event above the 20-year average, rainwater is discharged to the public sewer through the overflow.<\/span><\/p>\n<\/div>

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        Main lessons learned<\/h5>\n<\/div>
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          strict conditions for building permits to support municipal investment<\/p>\n<\/div><\/li>

        • <\/i><\/span>
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          Complex management of stormwater<\/p>\n<\/div><\/li>

        • <\/i><\/span>
          Overcoming public fears (risk of children drowning)<\/div><\/li>
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          The success of the investment (improving living conditions) is reflected in the increase in house prices<\/div><\/li><\/ul>

          Rue Garibaldi<\/strong><\/h3><\/h1><\/div>

          A multi-lane boulevard has been developed, where part of the car traffic area has been given back to pedestrians, cyclists and green space.Rainwater from the pavement and the cycle path is diverted to the green lane (fascia), and rainwater from the bus lane is stored in the underpass under the boulevard, which is no longer used, and reused for irrigation with a root zone drip system and for cleaning the pavements.<\/span> Research and studies have shown that pollutants from runoff into the green lane are filtered by the soil surface layer, which just needs to be replaced – so in later developed sites, stormwater from the carriageway is now being discharged into the green lane! The effect of rainwater siltation on trees is measured using dendrological instruments (growth, evapotranspiration monitoring).<\/p>\n<\/div>

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          Main lessons learned<\/h5>\n<\/div>
          • <\/i><\/span>
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            No need to fear stormwater run-off onto green surfaces, even with car traffic<\/p>\n<\/div><\/li>

          • <\/i><\/span>
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            It is important to improve the living conditions of the existing, mature tree line<\/p>\n<\/div><\/li>

          • <\/i><\/span>
            Finding potential in existing but underused infrastructure by providing new functionality<\/div><\/li><\/ul><\/div><\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":6821,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[105,96],"tags":[],"class_list":["post-6918","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-rain-garden","category-water-collection"],"_links":{"self":[{"href":"https:\/\/varosieso.hu\/en\/wp-json\/wp\/v2\/posts\/6918","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/varosieso.hu\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/varosieso.hu\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/varosieso.hu\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/varosieso.hu\/en\/wp-json\/wp\/v2\/comments?post=6918"}],"version-history":[{"count":6,"href":"https:\/\/varosieso.hu\/en\/wp-json\/wp\/v2\/posts\/6918\/revisions"}],"predecessor-version":[{"id":7111,"href":"https:\/\/varosieso.hu\/en\/wp-json\/wp\/v2\/posts\/6918\/revisions\/7111"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/varosieso.hu\/en\/wp-json\/wp\/v2\/media\/6821"}],"wp:attachment":[{"href":"https:\/\/varosieso.hu\/en\/wp-json\/wp\/v2\/media?parent=6918"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/varosieso.hu\/en\/wp-json\/wp\/v2\/categories?post=6918"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/varosieso.hu\/en\/wp-json\/wp\/v2\/tags?post=6918"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}