The interaction of rural and urban areas by flash floods and sediment transport

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F19%3A00336607" target="_blank" >RIV/68407700:21110/19:00336607 - isvavai.cz</a>

Result on the web

<a href="https://www.conftool.com/osm2019/index.php?page=browseSessions&search=bauer" target="_blank" >https://www.conftool.com/osm2019/index.php?page=browseSessions&search=bauer</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

The interaction of rural and urban areas by flash floods and sediment transport

Original language description

Intense rainfall-runoff events and subsequent soil erosion can cause serious damage to the infrastructure in urban areas. In the Czech Republic, the Ministry of the Interior has supported an analysis dealing with the risks to residents, infrastructure, and water bodies from flash floods. A total of more than 150 000 risk points over whole Czech Republic area (78 866 km2) were identified by GIS morphology and land-use analysis. The threat from rural areas (open landscape), the vulnerability for urban areas, and the resulting risk categories at boundaries were determined for each of these points. The WaTEM/SEDEM model was used to assess the threat with 10 m data resolution. The summarized vulnerability of real objects on individual runoff trajectories was combined with the threat of sediment transport, resulting in the overall risk represented by a 5-degree scale, from lowest (1) to highest (5). Generally 19% of the sites in the Czech Republic, i.e. more than 23 400 sites, have been assigned to categories 4 and 5, with a high level of risk. 34 % of cadastral units are classified as the high risky (4416 cadasters, with a total area 24707 km2). Approximately 30% of the population of the Czech Republic live in high-risk cadastral areas, potentially touched by high sediment transport to urban area. To reduce risk, four scenarios of protection were modeled. The most effective solution, covered by technical measures implementation or conversion to grassland within the contributing areas, can reduce the number of high-risk sites from 23 400 to 3 700.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

20701 - Environmental and geological engineering, geotechnics

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů