Estimation of flow rate calculation errors on the example of five rapid response catchments in the Mecsek Hills
Today flash floods are one of the most significant extreme weather-related natural hazards. Due to the global climate change and altered land use, intense runoff and flash floods may exert catastrophic hydrologic impacts on developed areas. To measure and observe runoff - affecting environmental fac...
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Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences
2013-12-01
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doaj-018aa6c677534fe1905e6e37b7f0986c2020-11-25T03:05:17ZengResearch Centre for Astronomy and Earth Sciences, Hungarian Academy of SciencesHungarian Geographical Bulletin2064-50312064-51472013-12-016243313502968Estimation of flow rate calculation errors on the example of five rapid response catchments in the Mecsek HillsPéter Hegedűs0Szabolcs Czigány1Ervin Pirkhoffer2László Balatonyi3Levente Ronczyk4 Doctoral School of Earth Sciences, University of Pécs, Hungary Department of Physical and Environmental Geography, Institute of Geography, University of Pécs, Hungary Department of Physical and Environmental Geography, Institute of Geography, University of Pécs, HungaryDoctoral School of Earth Sciences, University of Pécs, Hungary Institute of Geography, University of Pécs, HungaryToday flash floods are one of the most significant extreme weather-related natural hazards. Due to the global climate change and altered land use, intense runoff and flash floods may exert catastrophic hydrologic impacts on developed areas. To measure and observe runoff - affecting environmental factors we have calculated characteristic flow values (CFV) with five empirical equations for five selected watersheds in the Mecsek Hills, SW Hungary. CFV’s were then compared with measured characteristic Qmax values of 5, 10, 20, 33 and 100-year return period. From the empirical equations the Rational method was the most accurate while the largest differences between the calculated and measured values was observed for the Csermák-method. Nonetheless, determination of the input parameters for the Rational and Virág methods is rather challenging, thus, for practical applications, the Korismethod was found to be the most applicable equation to determine CFVs. Additionally, the median Koris errors showed a strong exponential correlation with the 5% specific runoff . If specific runoff could be estimated for any given outflow point, then error-specific runoff functions could be used to increase the accuracy of the Koris calculation method. To further increase the accuracy of CFVs for selected outflow points and cross sections, area and watershed-specific variables need to be included in the equation to account for topography, land use and soil properties.https://ojs.mtak.hu/index.php/hungeobull/article/view/2968flash floodrunoff calculationcfvcalculation error |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Péter Hegedűs Szabolcs Czigány Ervin Pirkhoffer László Balatonyi Levente Ronczyk |
spellingShingle |
Péter Hegedűs Szabolcs Czigány Ervin Pirkhoffer László Balatonyi Levente Ronczyk Estimation of flow rate calculation errors on the example of five rapid response catchments in the Mecsek Hills Hungarian Geographical Bulletin flash flood runoff calculation cfv calculation error |
author_facet |
Péter Hegedűs Szabolcs Czigány Ervin Pirkhoffer László Balatonyi Levente Ronczyk |
author_sort |
Péter Hegedűs |
title |
Estimation of flow rate calculation errors on the example of five rapid response catchments in the Mecsek Hills |
title_short |
Estimation of flow rate calculation errors on the example of five rapid response catchments in the Mecsek Hills |
title_full |
Estimation of flow rate calculation errors on the example of five rapid response catchments in the Mecsek Hills |
title_fullStr |
Estimation of flow rate calculation errors on the example of five rapid response catchments in the Mecsek Hills |
title_full_unstemmed |
Estimation of flow rate calculation errors on the example of five rapid response catchments in the Mecsek Hills |
title_sort |
estimation of flow rate calculation errors on the example of five rapid response catchments in the mecsek hills |
publisher |
Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences |
series |
Hungarian Geographical Bulletin |
issn |
2064-5031 2064-5147 |
publishDate |
2013-12-01 |
description |
Today flash floods are one of the most significant extreme weather-related natural hazards. Due to the global climate change and altered land use, intense runoff and flash floods may exert catastrophic hydrologic impacts on developed areas. To measure and observe runoff - affecting environmental factors we have calculated characteristic flow values (CFV) with five empirical equations for five selected watersheds in the Mecsek Hills, SW Hungary. CFV’s were then compared with measured characteristic Qmax values of 5, 10, 20, 33 and 100-year return period. From the empirical equations the Rational method was the most accurate while the largest differences between the calculated and measured values was observed for the Csermák-method. Nonetheless, determination of the input parameters for the Rational and Virág methods is rather challenging, thus, for practical applications, the Korismethod was found to be the most applicable equation to determine CFVs. Additionally, the median Koris errors showed a strong exponential correlation with the 5% specific runoff . If specific runoff could be estimated for any given outflow point, then error-specific runoff functions could be used to increase the accuracy of the Koris calculation method. To further increase the accuracy of CFVs for selected outflow points and cross sections, area and watershed-specific variables need to be included in the equation to account for topography, land use and soil properties. |
topic |
flash flood runoff calculation cfv calculation error |
url |
https://ojs.mtak.hu/index.php/hungeobull/article/view/2968 |
work_keys_str_mv |
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