Implementation of the Fourier series model to study impact of evapotrans- piration on runoff.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41210%2F15%3A%230000117" target="_blank" >RIV/60460709:41210/15:#0000117 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60460709:41310/15:#0000031 RIV/60460709:41330/15:#0000093

Výsledek na webu

<a href="http://www.iugg2015prague.com/" target="_blank" >http://www.iugg2015prague.com/</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Implementation of the Fourier series model to study impact of evapotrans- piration on runoff.

Popis výsledku v původním jazyce

Catchments are dynamic systems where evapotranspiration data can be assessed either by measurements of climate-meteorology output data, or by measurements of stream-flow fluctuation and free water evaporation. The latter procedure is connected with the recent development of high resolution (sensing) equipment for measuring discharges. Using a short time step (DT = 60 min) on small catchments enables the measurement of stream-flow fluctuation diurnally during 24 hours (day/night) in a harmonic wave, taking also into consideration the impact of actual evapotranspiration of a vegetation cover. In parallel, we have measured the water evaporation as well as the soil moisture content nearby. We have implemented a harmonic analysis of the discharges by the Fourier series model (FSM). This model provides computed discharges data estimated through the harmonic coefficients, as assessed by FSM. Such a procedure can be used also for supplementing missing data when stream-flow series are incomplete. By using measured data of water evaporation and soil moisture content we can compute the actual evapotranspiration from the catchment vegetation as the final output of the FSM model. When jagged, the measured series of discharges can also be smoothened by the Fourier approximation, or by the polynomial approximation.

Název v anglickém jazyce

Implementation of the Fourier series model to study impact of evapotrans- piration on runoff.

Popis výsledku anglicky

Catchments are dynamic systems where evapotranspiration data can be assessed either by measurements of climate-meteorology output data, or by measurements of stream-flow fluctuation and free water evaporation. The latter procedure is connected with the recent development of high resolution (sensing) equipment for measuring discharges. Using a short time step (DT = 60 min) on small catchments enables the measurement of stream-flow fluctuation diurnally during 24 hours (day/night) in a harmonic wave, taking also into consideration the impact of actual evapotranspiration of a vegetation cover. In parallel, we have measured the water evaporation as well as the soil moisture content nearby. We have implemented a harmonic analysis of the discharges by the Fourier series model (FSM). This model provides computed discharges data estimated through the harmonic coefficients, as assessed by FSM. Such a procedure can be used also for supplementing missing data when stream-flow series are incomplete. By using measured data of water evaporation and soil moisture content we can compute the actual evapotranspiration from the catchment vegetation as the final output of the FSM model. When jagged, the measured series of discharges can also be smoothened by the Fourier approximation, or by the polynomial approximation.

Druh

O - Ostatní výsledky

CEP obor

DA - Hydrologie a limnologie

OECD FORD obor

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Projekt

<a href="/cs/project/TA02020402" target="_blank" >TA02020402: OPTIMALIZACE VODNÍHO REŽIMU KRAJINY KE SNIŽOVÁNÍ DOPADŮ HYDROLOGICKÝCH EXTRÉMŮ</a><br>

Návaznosti

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

Rok uplatnění

2015

Kód důvěrnosti údajů

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