{"id":1068,"date":"2022-09-20T18:48:17","date_gmt":"2022-09-20T18:48:17","guid":{"rendered":"https:\/\/www.svasek.nl\/project\/model-research-seiches-ijburg\/"},"modified":"2023-10-09T08:54:27","modified_gmt":"2023-10-09T08:54:27","slug":"model-research-seiches-ijburg","status":"publish","type":"project","link":"https:\/\/www.svasek.nl\/en\/project\/model-research-seiches-ijburg\/","title":{"rendered":"Model research seiches IJburg"},"content":{"rendered":"<p>Upon request by Ingenieursbureau Gemeente Amsterdam (IB), Sva\u0161ek Hydraulics investigated the occurrence of seiches in &#8230;<\/p>\n","protected":false},"featured_media":1053,"template":"","tags":[],"project_category":[27,23],"class_list":["post-1068","project","type-project","status-publish","has-post-thumbnail","hentry","project_category-finel-en","project_category-waves-en"],"acf":{"download_pdf_button":1067,"download_pdf_button_en":1065,"project_info":{"left":{"diensten":"Numerical model study (using FINEL) and additional literature study.","opdrachtgever":"Municipality of Amsterdam","locatie":"Flood defences of IJburg, the Netherlands","datum":"2022"},"right":{"google_map":{"address":"9262+WJ Amsterdam, Netherlands","lat":52.36233855079845,"lng":5.001554550292955,"zoom":12,"place_id":"GhIJCop6HGEuSkARKaJwh5cBFEA","city":"Amsterdam","state":"North Holland","state_short":"NH","country":"Netherlands","country_short":"NL"}}},"content":{"title":"Searching for limiting meteorological conditions","text":"Upon request by Ingenieursbureau Gemeente Amsterdam (IB), Sva\u0161ek Hydraulics investigated the occurrence of seiches in the Markermeer\/IJmeer lake system which can impose limiting conditions on the flood defence of the Amsterdam city district of IJburg. This refers to the present as well as the future situation (after 2050), in which the lake\u2019s winter level will probably be enhanced by approximately 30 cm to mitigate effects of climate change.\r\n\r\nPhase 1 of this project included literature study as well as a quality assessment of research previously performed by Gemeente Amsterdam (IB) with respect to seiches near IJburg. It is concluded that the derivation of a limiting seiche-related water level surplus should be based upon limiting meteorological scenarios, rather than on conservative long-term statistics (which can be sensitive to measurement noise). Also, the physical mechanisms giving rise to seiches should be taken into account.\r\n\r\nNext, Phase 2 encompassed a model research for a limiting and conservative water level surplus related to seiches, to which the flood defence system of IJburg must comply. The modelling campaign has been performed using <a href=\"https:\/\/www.svasek.nl\/model-onderzoek\/finel\/\">FINEL<\/a>, the \u201cin-house\u201d numerical Finite-Element flow model developed by Sva\u0161ek Hydraulics.\r\n\r\nThe seiche surplus has been deter-mined based upon a wide range of promising meteorological scenarios (1,000 runs), which may involve an unfavourable combination of wind setup, seiches and waves. The FINEL-Markermeer model has been validated using two historical storm events. The influence of wind variations on seiches turns out to be far dominant above the influence of air pressure. Moreover, the limiting seiche event often occurs simultaneously with limiting wave attack.\r\n\r\nMaximum seiche heights at IJburg are always found for a wind direction clearing toward 360\u00b0 (and maximum wind setup is found for 30\u00b0). Based on HydraNL limiting wind speeds and a desired safety level of 1\/833 year, the future limiting seiche-related water level surplus for IJburg (not including wind setup) is found to be 0.28 m."},"slider":[{"image":1055,"video":""},{"image":1059,"video":""},{"image":1063,"video":""}],"expert_guy":{"left":{"title":"More information?","content":"Please contact Bernard Eikema.","linkedin_link":"https:\/\/www.linkedin.com\/in\/bernard-eikema\/","email":"eikema@svasek.nl"},"right":{"title":"Bernard Eikema","designation":"Project leader","photo":874}},"cta":{"title":"MORE INFORMATION ABOUT SVA\u0160EK OR OUR EXPERTISES?","text":"Please contact us or make an appointment.","link":{"title":"CONTACT US","url":"https:\/\/www.svasek.nl\/en\/contact\/","target":""}},"custom_links":{"linked_url":""},"hide":[]},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.svasek.nl\/en\/wp-json\/wp\/v2\/project\/1068","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.svasek.nl\/en\/wp-json\/wp\/v2\/project"}],"about":[{"href":"https:\/\/www.svasek.nl\/en\/wp-json\/wp\/v2\/types\/project"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.svasek.nl\/en\/wp-json\/wp\/v2\/media\/1053"}],"wp:attachment":[{"href":"https:\/\/www.svasek.nl\/en\/wp-json\/wp\/v2\/media?parent=1068"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.svasek.nl\/en\/wp-json\/wp\/v2\/tags?post=1068"},{"taxonomy":"project_category","embeddable":true,"href":"https:\/\/www.svasek.nl\/en\/wp-json\/wp\/v2\/project_category?post=1068"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}