Classification of Small Watersheds in Czech Republic for Hydrological Modelling

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F17%3A00314207" target="_blank" >RIV/68407700:21110/17:00314207 - isvavai.cz</a>

Výsledek na webu

<a href="https://sgemworld.at/sgemlib/spip.php?article9496" target="_blank" >https://sgemworld.at/sgemlib/spip.php?article9496</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5593/sgem2017/31/S12.016" target="_blank" >10.5593/sgem2017/31/S12.016</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Classification of Small Watersheds in Czech Republic for Hydrological Modelling

Popis výsledku v původním jazyce

The article presents a classification of small watersheds in the Czech Republic in terms of potential hydrological response to a set of design precipitation time series. Watershed classes as well as precipitation time series were derived as a partial result of a three-year project aimed at the design of typical soil conservation measures and small water management structures. Design precipitation scenarios were derived in an analysis of both raingauge and radar measurements taking into consideration the precipitation totals, their frequency, internal intensity distribution and spatial distribution over the Czech republic. A motivation for watersheds categorization lies in the need of assessing the impacts of derived precipitation scenarios on the watersheds’ response using various hydrologic models. As representative models HEC-HMS, SMODERP, MIKE-SHE and TOPMODEL were selected. The watersheds classification is solved in a scale of small stream basins. The main parameters affecting a hydrological response were calculated for each basin. The principal characteristics involved in the evaluation are basin area, drainage density, average elevation and slope. Land cover, geological and hydrologic soil properties are reflected in the average runoff curve number (SCS-CN). In terms of parameters which affect the timing and shape of runoff response the watershed shape coefficient alpha, specific maximum flow path length and the mean surface flow path length were calculated. Dependent parameters were discarded resulting in final five parameters for the subsequent grouping analysis. For the classification a Grouping Analysis Tool using the K-means method was applied. The grouping was tested successively using from 3 to 7 classes. In the end for the final 5 classes representative watersheds were selected. These representatives will be further used in hydrologic modelling and uncertainty analyses.

Název v anglickém jazyce

Classification of Small Watersheds in Czech Republic for Hydrological Modelling

Popis výsledku anglicky

The article presents a classification of small watersheds in the Czech Republic in terms of potential hydrological response to a set of design precipitation time series. Watershed classes as well as precipitation time series were derived as a partial result of a three-year project aimed at the design of typical soil conservation measures and small water management structures. Design precipitation scenarios were derived in an analysis of both raingauge and radar measurements taking into consideration the precipitation totals, their frequency, internal intensity distribution and spatial distribution over the Czech republic. A motivation for watersheds categorization lies in the need of assessing the impacts of derived precipitation scenarios on the watersheds’ response using various hydrologic models. As representative models HEC-HMS, SMODERP, MIKE-SHE and TOPMODEL were selected. The watersheds classification is solved in a scale of small stream basins. The main parameters affecting a hydrological response were calculated for each basin. The principal characteristics involved in the evaluation are basin area, drainage density, average elevation and slope. Land cover, geological and hydrologic soil properties are reflected in the average runoff curve number (SCS-CN). In terms of parameters which affect the timing and shape of runoff response the watershed shape coefficient alpha, specific maximum flow path length and the mean surface flow path length were calculated. Dependent parameters were discarded resulting in final five parameters for the subsequent grouping analysis. For the classification a Grouping Analysis Tool using the K-means method was applied. The grouping was tested successively using from 3 to 7 classes. In the end for the final 5 classes representative watersheds were selected. These representatives will be further used in hydrologic modelling and uncertainty analyses.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10501 - Hydrology

Projekt

<a href="/cs/project/QJ1520265" target="_blank" >QJ1520265: Vliv variability krátkodobých srážek a následného odtoku v malých povodích České republiky na hospodaření s vodou v krajině</a><br>

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

SGEM2017 Conference Proceedings; Water Resources. Forest, Marine and Ocean Ecosystems

ISBN

978-619-7408-04-1

ISSN

1314-2704

e-ISSN

—

Počet stran výsledku

8

Strana od-do

121-128

Název nakladatele

International Multidisciplinary Scientific GeoConference SGEM

Místo vydání

Sofia

Místo konání akce

Albena

Datum konání akce

27. 6. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—