Could be hydrological model parameters inferred from a soil texture?

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F19%3A00336507" target="_blank" >RIV/68407700:21110/19:00336507 - isvavai.cz</a>

Výsledek na webu

<a href="https://meetingorganizer.copernicus.org/EGU2019/EGU2019-13921.pdf" target="_blank" >https://meetingorganizer.copernicus.org/EGU2019/EGU2019-13921.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Could be hydrological model parameters inferred from a soil texture?

Popis výsledku v původním jazyce

Hydrological modelling of the runoff response to the causal rainfall on the small catchment or individual plotscale is an important part of designing the water management measures in the landscape. Classic methods basedon CN and unit hydrograph are implemented in number of models (HEC-HMS, WMS, etc.). This approach is alsobeing implemented in the Atlas environment. Expanding the use of physically-based approach still faces numberof ambiguities. Obtaining parameters of hydrological models may be a difficult task. Measurement of physicallybased parameters is often time consuming and costly. On the other side, obtaining parameters by calibrationrequire long term time series of data which are often not available in appropriate quality. In contrast to other soilproperties, soil texture is relatively easy to obtain. In this contribution we present an attempt to link soil texture tosurface runoff model parameters. Serie of artificial rainfall experiments on 4 m2 plot with disturbed soil of varioustexture was undertaken. Besides soil texture the experiments differ in terms of rainfall intensity and slope. Episodicrainfall-runoff model smoderp2d was used to model those experiments. Parameters of Philip’s infiltration, requiredby the model, were calculated directly for each single experiment. Manning-Strickler formula is used in simplifiedsolution of the kinematic wave equation to express the momentum. Manning-Strickler (MS) formula, which isusually used to 1D channel flow calculations, is used to model the surface sheet flow. Roughness coefficient,which express the effect of current state of soil aggregates, texture and vegetation, is important parameter of MSformula. Roughness coefficient and other two parameters, related to surface slope and water level height wereoptimised. Response sensitivity... The research has been supported by the research grants SGS17/173/OHK1, TJ01000270 and QK1910029.

Název v anglickém jazyce

Could be hydrological model parameters inferred from a soil texture?

Popis výsledku anglicky

Hydrological modelling of the runoff response to the causal rainfall on the small catchment or individual plotscale is an important part of designing the water management measures in the landscape. Classic methods basedon CN and unit hydrograph are implemented in number of models (HEC-HMS, WMS, etc.). This approach is alsobeing implemented in the Atlas environment. Expanding the use of physically-based approach still faces numberof ambiguities. Obtaining parameters of hydrological models may be a difficult task. Measurement of physicallybased parameters is often time consuming and costly. On the other side, obtaining parameters by calibrationrequire long term time series of data which are often not available in appropriate quality. In contrast to other soilproperties, soil texture is relatively easy to obtain. In this contribution we present an attempt to link soil texture tosurface runoff model parameters. Serie of artificial rainfall experiments on 4 m2 plot with disturbed soil of varioustexture was undertaken. Besides soil texture the experiments differ in terms of rainfall intensity and slope. Episodicrainfall-runoff model smoderp2d was used to model those experiments. Parameters of Philip’s infiltration, requiredby the model, were calculated directly for each single experiment. Manning-Strickler formula is used in simplifiedsolution of the kinematic wave equation to express the momentum. Manning-Strickler (MS) formula, which isusually used to 1D channel flow calculations, is used to model the surface sheet flow. Roughness coefficient,which express the effect of current state of soil aggregates, texture and vegetation, is important parameter of MSformula. Roughness coefficient and other two parameters, related to surface slope and water level height wereoptimised. Response sensitivity... The research has been supported by the research grants SGS17/173/OHK1, TJ01000270 and QK1910029.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10501 - Hydrology

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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