Classification of Small Watersheds in Czech Republic for Hydrological Modelling
Result description
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.
Keywords
small watershedclassificationhydrologic modellinguncertainty analysisrainfall temporal distribution
The result's identifiers
Result code in IS VaVaI
Result on the web
DOI - Digital Object Identifier
Alternative languages
Result language
angličtina
Original language name
Classification of Small Watersheds in Czech Republic for Hydrological Modelling
Original language description
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.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
10501 - Hydrology
Result continuities
Project
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
SGEM2017 Conference Proceedings; Water Resources. Forest, Marine and Ocean Ecosystems
ISBN
978-619-7408-04-1
ISSN
1314-2704
e-ISSN
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Number of pages
8
Pages from-to
121-128
Publisher name
International Multidisciplinary Scientific GeoConference SGEM
Place of publication
Sofia
Event location
Albena
Event date
Jun 27, 2017
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
—
Basic information
Result type
D - Article in proceedings
OECD FORD
Hydrology
Year of implementation
2017