{"id":17104,"date":"2021-01-22T15:34:00","date_gmt":"2021-01-22T13:34:00","guid":{"rendered":"https:\/\/www.sweco.fi\/?post_type=showroom_cpt&p=17104"},"modified":"2022-12-05T18:35:35","modified_gmt":"2022-12-05T16:35:35","slug":"long-term-flood-planning-is-part-of-everyday-land-use-in-pudasjarvi","status":"publish","type":"showroom_cpt","link":"https:\/\/www.sweco.fi\/en\/projects\/long-term-flood-planning-is-part-of-everyday-land-use-in-pudasjarvi\/","title":{"rendered":"Long-term flood planning is part of everyday land use in Pudasj\u00e4rvi"},"content":{"rendered":"
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Long-term flood planning is part of everyday land use in Pudasj\u00e4rvi <\/h1>\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t<\/div>\n\n\t\t\n\t\t
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\n\t\t\t\t\tClient<\/em>\t\t\t\t\t

Town of Pudasj\u00e4rvi <\/p>\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

\n\t\t\t\t\tProject developer<\/em>\t\t\t\t\t

Sweco Environment<\/p>\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

\n\t\t\t\t\tCommission<\/em>\t\t\t\t\t

Iijoki local master shore plan, damage risk assessment, dam safety documents and stormwater pump station renovations<\/p>\t\t\t\t<\/div>\n\t\t\t\t\t\t\t

\n\t\t\t\t\tSchedule<\/em>\t\t\t\t\t

framework agreement consultant 2010\u20132020<\/p>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\n<\/section>\n\n\n\n\n

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Long-term flood planning is part of everyday land use in Pudasj\u00e4rvi<\/h2>\n

Sweco\u2019s experts in land use, water supply and infrastructure design have now been the trusted partners of the Town of Pudasj\u00e4rvi for over 10 years. The most important joint projects have been the Iijoki local master shore plan and long-term flood and stormwater planning. A riverside poses an even greater design challenge than a seaside, since the floods are harder to predict.<\/p>\n

Over a decade, Sweco\u2019s experts have carried out several street infrastructure and water management projects in Pudasj\u00e4rvi. The town centre lies low by the Iijoki river, meaning that nearly all projects have had to take flood and landslide risks into account.<\/p>\n

\u201cOur partnership with Pudasj\u00e4rvi is not limited to one or two things. Instead, we produce solutions to broader issues together with the Town\u2019s professionals,\u201d says Sweco\u2019s land use specialist\u00a0Tapio Tuuttila<\/strong>. In many projects, local knowledge is as valuable as modern measurement instruments and design programs. \u201cThe people of the Town are exemplary co-operation partners. They provide us with information, trust and support in every project.\u201d<\/p>\n

Land Use Engineer Markku Mattinen<\/strong> from the Town of Pudasj\u00e4rvi is also happy with Sweco\u2019s know-how, which is utilised with a low threshold as needed. \u201cWe have a wide range of designers available to us, and a multifaceted co-operation has developed over the years. Overall, our projects are under control and the designers are familiar with our region. Together, we can get work underway quickly.\u201d<\/p>\n

A peak flood hits approximately once a century<\/h3>\n

Riverside tourism is important to Pudasj\u00e4rvi, Finland\u2019s log house capital. However, peak floods that occur approximately once a century must be taken into consideration in all shore construction. One of the greatest challenges in land use is the fact that human memory is not enough for assessing floods.<\/p>\n

\u201cMany landowners do not remember the river having ever flooded dangerously high, so the desire to build on the shore is great,\u201d Tuuttila comments. \u201cHowever, in flood planning, all building parts susceptible to moisture must be one metre higher than the predicted flood peak.\u201d<\/p>\n

The overall water management situation and great fluctuations in different seasons must also be taken into account. More than half of Pudasj\u00e4rvi\u2019s land area consists of swampland, so water retention is at a low level. When snow melts rapidly in the spring, the situation is similar to a torrential rain in a city centre.<\/p>\n

\u201cBetween a dry summer and a spring following a snowy winter, the water level of the river may fluctuate more than three metres,\u201d says Sweco\u2019s water management specialist Tuomo Ylimaunu<\/strong>. Another contributing factor is extreme weather phenomena caused by climate change, such as long drought periods and earlier springs. \u201cIf an ice dam forms on the river while the snow is rapidly melting as the temperature increases drastically, the flood may be as high as eight metres.\u201d<\/p>\n

Master shore plan to guide safe construction<\/h3>\n

The biggest project in the Pudasj\u00e4rvi flood planning was the Iijoki local master shore plan ten years ago. The plan covers 100 kilometres of shoreline on either side of the river and over 8,000 hectares of land.<\/p>\n

\u201cPudasj\u00e4rvi did not have an existing master shore plan, so the planning process took around five years, including extensive nature, landscape and archaeological surveys,\u201d Tuuttila says. Landowners were also heard extensively. \u201cThe result facilitates happy life by Iijoki without flood damage.\u201d<\/p>\n

\u201cThe master shore plan and the flood hazard map clarify land use planning and justifying planning solutions,\u201d Mattinen adds. \u201cNo one wants to build in a flood risk area.\u201d<\/p>\n

Stormwater management behind floodbanks<\/h3>\n

Damming the river shores is not a suitable solution for broad areas, as building embankments changes the behaviour of floods. However, in protecting the Pudasj\u00e4rvi urban area, dams are the only viable method.<\/p>\n

\u201cThe floodbanks were built 20 years ago, and as legislation became stricter, we created damage risk assessments concerning the dams, as well as dam safety documents,\u201d Ylimaunu says. The documents define aspects such as dam maintenance. \u201cWe calculated how floods can be kept within the watercourse and stormwaters behind the embankments. We must prevent the occurrence of internal floods in the urban area due to battling an external threat!\u201d<\/p>\n

Planning water management in a flood risk area requires a broad overall vision and continuity. \u201cWe have charted the stormwater networks on the terrain over several summers and, at the moment, we are renovating stormwater pump stations,\u201d Ylimaunu says. \u201cTogether, we are making sure that the dams, the stormwater network and the pump stations are operational when they are needed.\u201d<\/p>\n

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\u201cWe have a wide range of designers available to us, and a multifaceted co-operation has developed over the years. Overall, our projects are under control and the designers are familiar with our region. Together, we can get work underway quickly.\u201d
\n– Markku Mattinen, Town of Pudasj\u00e4rvi<\/p>\n

\u201cThe master shore plan and the flood hazard map clarify land use planning and justifying planning solutions.\u201d
\n– Markku Mattinen, Town of Pudasj\u00e4rvi<\/p><\/blockquote>\n\t\t<\/div>\n\t<\/div>\n<\/div>\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Sweco\u2019s experts in land use, water supply and infrastructure design have now been the trusted partners of the Town of Pudasj\u00e4rvi for over 10 years. The most important joint projects have been the Iijoki local master shore plan and long-term flood and stormwater planning. A riverside poses an even greater design challenge than a seaside, since the floods are harder to predict.<\/p>\n","protected":false},"featured_media":9541,"template":"","showroom_cats":[161,153,152],"showroom_expertise":[],"showroom_partners":[],"showroom_location":[],"showroom_client":[],"class_list":["post-17104","showroom_cpt","type-showroom_cpt","status-publish","has-post-thumbnail","hentry","showroom_cats-environment-and-nature","showroom_cats-bridges-and-structures","showroom_cats-infrastructure-and-transportation"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.sweco.fi\/en\/wp-json\/wp\/v2\/showroom_cpt\/17104","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sweco.fi\/en\/wp-json\/wp\/v2\/showroom_cpt"}],"about":[{"href":"https:\/\/www.sweco.fi\/en\/wp-json\/wp\/v2\/types\/showroom_cpt"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.sweco.fi\/en\/wp-json\/wp\/v2\/media\/9541"}],"wp:attachment":[{"href":"https:\/\/www.sweco.fi\/en\/wp-json\/wp\/v2\/media?parent=17104"}],"wp:term":[{"taxonomy":"showroom_cats","embeddable":true,"href":"https:\/\/www.sweco.fi\/en\/wp-json\/wp\/v2\/showroom_cats?post=17104"},{"taxonomy":"showroom_expertise","embeddable":true,"href":"https:\/\/www.sweco.fi\/en\/wp-json\/wp\/v2\/showroom_expertise?post=17104"},{"taxonomy":"showroom_partners","embeddable":true,"href":"https:\/\/www.sweco.fi\/en\/wp-json\/wp\/v2\/showroom_partners?post=17104"},{"taxonomy":"showroom_location","embeddable":true,"href":"https:\/\/www.sweco.fi\/en\/wp-json\/wp\/v2\/showroom_location?post=17104"},{"taxonomy":"showroom_client","embeddable":true,"href":"https:\/\/www.sweco.fi\/en\/wp-json\/wp\/v2\/showroom_client?post=17104"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}