{"id":33785,"date":"2023-06-09T16:53:26","date_gmt":"2023-06-09T14:53:26","guid":{"rendered":"https:\/\/www.tygron.com\/?p=33785"},"modified":"2024-06-11T10:50:37","modified_gmt":"2024-06-11T08:50:37","slug":"khakhova-dam-break-simulation","status":"publish","type":"post","link":"https:\/\/www.tygron.net\/nl\/blog\/2023\/06\/09\/khakhova-dam-break-simulation\/","title":{"rendered":"Hydrodynamic Model of Khakovka dam breach"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"33785\" class=\"elementor elementor-33785\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-1a5f263 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"1a5f263\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-thegem\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-dbc8c67\" data-id=\"dbc8c67\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-2bd757b flex-horizontal-align-default flex-horizontal-align-tablet-default flex-horizontal-align-mobile-default flex-vertical-align-default flex-vertical-align-tablet-default flex-vertical-align-mobile-default elementor-widget elementor-widget-text-editor\" data-id=\"2bd757b\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.20.0 - 26-03-2024 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#69727d;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#69727d;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t<p>In the hours and days after the catastrophic Kakhovka dam break in Ukraine, Tygron worked intensively with Arcadis to build a model in order\u00a0to gain better insights into the disaster. The resulting model, built on Tygron\u2019s advanced [LR1]\u00a0modelling technology, allowed experts on the ground to anticipate the course of the flooding and take proactive measures to mitigate its impact.\u00a0Using the hydrodynamic model, the arrival times, flow velocities and intensities of the floodwater could be accurately simulated for specific areas. These insights supported the formulation of effective evacuation plans and contributed to the relief operations.<\/p><p><span lang=\"EN-US\">To see the results, check out <a href=\"https:\/\/power.tygron.com\/share\/tygronrd\/ua\/cherson5\/?token=2fQOQUcVF7AxfwicSZ4JBQlS0TubYS00\" target=\"_blank\" rel=\"noopener\"><span style=\"text-decoration: underline;\">map-viewer.<\/span> <\/a><\/span><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4fb1929 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4fb1929\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-thegem\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-dec4437\" data-id=\"dec4437\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-ec9e538 flex-horizontal-align-default flex-horizontal-align-tablet-default flex-horizontal-align-mobile-default flex-vertical-align-default flex-vertical-align-tablet-default flex-vertical-align-mobile-default elementor-widget elementor-widget-text-editor\" data-id=\"ec9e538\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>The timeline of Tygron\u2019s actions following the Kakhovka\u00a0dam breach:<\/p><p><span lang=\"EN-US\"><strong>June 6 2023:<\/strong> <\/span>The\u00a0Kakhovka\u00a0dam failed at 03:00 (NL time\/GMT+1) on 6 June (source: Wikipedia). The first results became available within just a few hours. We were able to validate those immediately based on images from mainstream and social media.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4ab4aa7 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4ab4aa7\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-thegem\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-9462006\" data-id=\"9462006\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-d537db7 flex-horizontal-align-default flex-horizontal-align-tablet-default flex-horizontal-align-mobile-default flex-vertical-align-default flex-vertical-align-tablet-default flex-vertical-align-mobile-default elementor-widget elementor-widget-image\" data-id=\"d537db7\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.20.0 - 26-03-2024 *\/\n.elementor-widget-image{text-align:center}.elementor-widget-image a{display:inline-block}.elementor-widget-image a img[src$=\".svg\"]{width:48px}.elementor-widget-image img{vertical-align:middle;display:inline-block}<\/style>\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"422\" src=\"https:\/\/www.tygron.net\/wp-content\/uploads\/2023\/06\/cherson-flooding2.gif\" class=\"attachment-large size-large wp-image-33787\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-d4ffbde elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"d4ffbde\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-thegem\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-869e262\" data-id=\"869e262\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f35fe08 flex-horizontal-align-default flex-horizontal-align-tablet-default flex-horizontal-align-mobile-default flex-vertical-align-default flex-vertical-align-tablet-default flex-vertical-align-mobile-default elementor-widget elementor-widget-image\" data-id=\"f35fe08\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"800\" height=\"25\" src=\"https:\/\/www.tygron.net\/wp-content\/uploads\/2023\/06\/legend-flow-1024x32.png\" class=\"attachment-large size-large wp-image-33831\" alt=\"\" srcset=\"https:\/\/www.tygron.net\/wp-content\/uploads\/2023\/06\/legend-flow-1024x32.png 1024w, https:\/\/www.tygron.net\/wp-content\/uploads\/2023\/06\/legend-flow-300x9.png 300w, https:\/\/www.tygron.net\/wp-content\/uploads\/2023\/06\/legend-flow-768x24.png 768w, https:\/\/www.tygron.net\/wp-content\/uploads\/2023\/06\/legend-flow-1536x49.png 1536w, https:\/\/www.tygron.net\/wp-content\/uploads\/2023\/06\/legend-flow.png 1709w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-712b351 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"712b351\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-thegem\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-5b862b7\" data-id=\"5b862b7\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f7c4215 flex-horizontal-align-default flex-horizontal-align-tablet-default flex-horizontal-align-mobile-default flex-vertical-align-default flex-vertical-align-tablet-default flex-vertical-align-mobile-default elementor-widget elementor-widget-text-editor\" data-id=\"f7c4215\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><strong><span lang=\"EN-US\">June 8 2023:<\/span><\/strong><\/p><p><span lang=\"EN-US\">We received input from a former Cherson resident, an environmental engineer, who shared observations directly from the disaster area. Our first results turned out to be an underestimation of the flood; the breach in the dam had quickly become a lot larger than the one visible in the first TV images. Based on this input, we were able to continuously validate and run the model with new insights.<\/span><\/p><p><a href=\"https:\/\/www.linkedin.com\/feed\/update\/urn:li:activity:7073652134457561088\/\" target=\"_blank\" rel=\"noopener noreferrer\" data-auth=\"NotApplicable\" data-linkindex=\"1\">Post | Feed | LinkedIn<\/a><\/p><ul><li><p>The existing model showed the results up to two days after the breach.\u00a0We started running a second model with a 20-day time frame, i.e. predicting the effects 18 days into the future. This would give relevant insights to help determine longer-term measures.<\/p><p>With the help of Mykola, we calibrated the model based on geolocations of the border of the flooding (see images).<\/p><\/li><li><p>One major adjustment was to increase the size of the breach and thus the discharge (now nearly twice as large) in the model to reflect the realistic breach growth over time (from approx. 200m wide to 550m wide, based on analysis of aerial photos).<\/p><\/li><li><p>We also increased the \u2018smoothness\u2019 of the flood area (by increasing the Manning value) as there is a lot of debris that significantly impacts flow speed and surface resistance.<\/p><\/li><li><p>The 20-day model should provide additional insights into the risk of drying, and it also includes infiltration.<\/p><p><span style=\"text-decoration: underline;\">Other insights:<\/span><\/p><\/li><li><p>Based on the initial results from the model, drying starts approximately after seven days, although this varies based on the location.<\/p><\/li><li><p>Videos had spread of the dam upstream of the Khakovka dam still discharging water through its sluice gates. These images led people to conclude that the Khakovka dam was unnecessarily exposed to higher discharge, resulting in further destruction of the dam. However, this was not significant according to the results from the model. The simulated breach discharge was max. 25,000m3\/s, which was negligible in comparison to the normal Dnieper discharge of 1,600m3\/s.\u00a0<\/p><\/li><\/ul><p><strong><span lang=\"EN-US\">June 9 2023:<\/span><\/strong><\/p><p>The model was updated with a 20-day predictive time frame, providing very highly detailed information about the situation in the affected areas over the coming days.\u00a0While the flood peak had subsided, the area would remain flooded, although the water levels would gradually recede. The simulation provided insights into water depths over time.<\/p><p><a href=\"https:\/\/www.linkedin.com\/feed\/update\/urn:li:activity:7072837665951240192\/\" target=\"_blank\" rel=\"noopener noreferrer\" data-auth=\"NotApplicable\" data-linkindex=\"2\">Post | Feed | LinkedIn<\/a><br \/>Improvements:<span lang=\"EN-US\"><br \/><\/span><\/p><ul><li><p>smoother breach growth from 200m to 550m wide.<\/p><\/li><li><p>minor improvements to the legend<\/p><\/li><li><p>improved infiltration in the 20-day run, based on land type, with 50cm storage in the soil for the three-week period. On average, the drying starts after six to seven days.<\/p><\/li><\/ul><p><strong>June 11 2023:<\/strong><\/p><p>The next steps were to gradually work towards more insights and validating the approach and model. More validation material was processed, such as satellite imagery and photos of specific locations. The results were made available in a swipe viewer:<\/p><p><a href=\"https:\/\/tygron.maps.arcgis.com\/apps\/webappviewer\/index.html?id=4d454f03a32243b8bd3e6c9093c6fc99\" target=\"_blank\" rel=\"noopener\">https:\/\/tygron.maps.arcgis.com\/apps\/webappviewer\/index.html?id=4d454f03a32243b8bd3e6c9093c6fc99<\/a><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-79d3c2e elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"79d3c2e\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-thegem\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-e903267\" data-id=\"e903267\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4701258 flex-horizontal-align-default flex-horizontal-align-tablet-default flex-horizontal-align-mobile-default flex-vertical-align-default flex-vertical-align-tablet-default flex-vertical-align-mobile-default elementor-widget elementor-widget-image\" data-id=\"4701258\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"800\" height=\"442\" src=\"https:\/\/www.tygron.net\/wp-content\/uploads\/2023\/06\/tygron-iceye.gif\" class=\"attachment-large size-large wp-image-33878\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-e0da0ff elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"e0da0ff\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-thegem\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-972d928\" data-id=\"972d928\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f8da026 flex-horizontal-align-default flex-horizontal-align-tablet-default flex-horizontal-align-mobile-default flex-vertical-align-default flex-vertical-align-tablet-default flex-vertical-align-mobile-default elementor-widget elementor-widget-text-editor\" data-id=\"f8da026\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><strong>A tool for crisis management agencies<\/strong><\/p><p>We understand that collaborative efforts from different sources are vital during times of crisis, and we believe our models can significantly contribute to understanding the situation for future analysis. Tygron\u2019s modelling capabilities can be a tool for crisis management agencies, enabling them to explore various strategies and scenarios. This includes implementing preventive measures and devising evacuation plans. Additionally, the models can provide accurate estimates of potential flood damage.<\/p><p>As described above, the model results are based on publicly available data and information, and are validated using news, articles and information directly from the disaster area. However, any modelling study involves a certain degree of uncertainty. If you intend to use the results for crisis management in a disaster-stricken area, or if the deployment of our modelling capabilities can assist you in any other way, please don\u2019t hesitate to contact us.<\/p><p><strong>Read more (in Dutch):<\/strong><\/p><p><a href=\"https:\/\/www.trouw.nl\/buitenland\/nederlandse-experts-berekenen-waterstroom-na-dambreuk-oekraine~bb21fa3a\/\" target=\"_blank\" rel=\"noopener\">https:\/\/www.trouw.nl\/buitenland\/nederlandse-experts-berekenen-waterstroom-na-dambreuk-oekraine~bb21fa3a\/<\/a><\/p><p><a href=\"https:\/\/www.h2owaternetwerk.nl\/h2o-actueel\/nederlandse-computersimulaties-van-damdoorbraak-helpen-reddingsacties\" target=\"_blank\" rel=\"noopener\">https:\/\/www.h2owaternetwerk.nl\/h2o-actueel\/nederlandse-computersimulaties-van-damdoorbraak-helpen-reddingsacties<\/a><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-0e451ac elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"0e451ac\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-thegem\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-cb5416f\" data-id=\"cb5416f\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>In the hours and days after the catastrophic Kakhovka dam break in Ukraine, Tygron worked intensively with Arcadis to build a model in order\u00a0to gain better insights into the disaster. The resulting model, built on Tygron\u2019s advanced [LR1]\u00a0modelling technology, allowed experts on the ground to anticipate the course of the flooding and take proactive measures [&hellip;]<\/p>","protected":false},"author":2,"featured_media":33794,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[121,122,123,173],"tags":[172,65],"class_list":["post-33785","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cat1en","category-cat2en","category-cat2nl","category-relevant","tag-relevant","tag-water-safety"],"_links":{"self":[{"href":"https:\/\/www.tygron.net\/nl\/wp-json\/wp\/v2\/posts\/33785","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tygron.net\/nl\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tygron.net\/nl\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tygron.net\/nl\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tygron.net\/nl\/wp-json\/wp\/v2\/comments?post=33785"}],"version-history":[{"count":87,"href":"https:\/\/www.tygron.net\/nl\/wp-json\/wp\/v2\/posts\/33785\/revisions"}],"predecessor-version":[{"id":40148,"href":"https:\/\/www.tygron.net\/nl\/wp-json\/wp\/v2\/posts\/33785\/revisions\/40148"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.tygron.net\/nl\/wp-json\/wp\/v2\/media\/33794"}],"wp:attachment":[{"href":"https:\/\/www.tygron.net\/nl\/wp-json\/wp\/v2\/media?parent=33785"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tygron.net\/nl\/wp-json\/wp\/v2\/categories?post=33785"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tygron.net\/nl\/wp-json\/wp\/v2\/tags?post=33785"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}