MODELLING LARGE - SCALE HYDRODYNAMIC MODEL USING HEC-RAS

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27740%2F14%3A86092006" target="_blank" >RIV/61989100:27740/14:86092006 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.5593/SGEM2014/B31/S12.062" target="_blank" >http://dx.doi.org/10.5593/SGEM2014/B31/S12.062</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5593/SGEM2014/B31/S12.062" target="_blank" >10.5593/SGEM2014/B31/S12.062</a>

Result language

angličtina

Original language name

MODELLING LARGE - SCALE HYDRODYNAMIC MODEL USING HEC-RAS

Original language description

The construction of accurate numerical hydrodynamic models is an important task for flood simulations. Accurate modelling is essential not only for flood simulations but also for detection of events that can cause damage on property or human lives. This work presents a comprehensive methodology for building of hydrodynamic model on large area (approx. 1000 km2). The model was built using 1-D hydrodynamic program HEC-RAS. Study area is Ostravica catchment (827.4 km2). Which is located in the north-east of the Czech republic. The study area was selected on the basis of the accessibility of topographic data and regularly repeated events. The model was subdivided into 24 unique schematizations which were joined with boundary conditions (mainly flow hydrograph or rating curve). Boundary conditions have been obtained from river stations which cover the whole catchment. Manning's values, contraction and expansion coefficients were applied across the whole domain. Manning roughness coefficient was used in the Manning's formula for flow calculation in open flow channels. Usual Manning's value for channels in CR is 0.035. The values outside the river channel were derived from the land cover layer. Storage areas, bridges and other obstacles were included into hydrodynamic model as well. Calibration and validation were separated tasks and were carried out with separate data. The calibration phase was done using May 2010 flood event and the validation was done using August 2009 flood event. The results of the large-scale hydrodynamic model has shown that relatively good match with real state. Developed model may have following problems: problematic parameterization and to maintain all part on the same level of computational accuracy. The problems related to computational time are strongly depended on available hardware. The calibrated model provides a diagnostic tool for future analyses of flood events. Developed model will be incorporated into the Floreon+ in the near future.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

DA - Hydrology and limnology

OECD FORD branch

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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

2014

Confidentiality

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

Article name in the collection

SGEM 2014 : 14th International Multidisciplinary Scientific Geoconference : Geoconference on Water Resources. Forest, Marine and Ocean Ecosystems : 17-26, June, 2014, Albena, Bulgaria : conference proceedings. Volume I, Hydrology and water resources

ISBN

978-619-7105-13-1

ISSN

1314-2704

e-ISSN

—

Number of pages

8

Pages from-to

479-486

Publisher name

STEF92 Technology Ltd.

Place of publication

Sofia

Event location

Albena

Event date

Jun 17, 2014

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000371595200062