Anatomy of extraordinary rainfall and flash flood in a Dutch lowland catchment

C. C. Brauer, A. J. Teuling, A. Overeem, Y. Van Der Velde, P. Hazenberg, P. M.M. Warmerdam, R. Uijlenhoet

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

On 26 August 2010 the eastern part of The Netherlands and the bordering part of Germany were struck by a series of rainfall events lasting for more than a day. Over an area of 740 km2 more than 120 mm of rainfall were observed in 24 h. This extreme event resulted in local flooding of city centres, highways and agricultural fields, and considerable financial loss. In this paper we report on the unprecedented flash flood triggered by this exceptionally heavy rainfall event in the 6.5 km2 Hupsel Brook catchment, which has been the experimental watershed employed by Wageningen University since the 1960s. This study aims to improve our understanding of the dynamics of such lowland flash floods. We present a detailed hydrometeorological analysis of this extreme event, focusing on its synoptic meteorological characteristics, its space-time rainfall dynamics as observed with rain gauges, weather radar and a microwave link, as well as the measured soil moisture, groundwater and discharge response of the catchment. At the Hupsel Brook catchment 160 mm of rainfall was observed in 24 h, corresponding to an estimated return period of well over 1000 years. As a result, discharge at the catchment outlet increased from 4.4 × 10-3 to nearly 5 m3 s-1. Within 7 h discharge rose from 5 × 10-2 to 4.5 m3 s -1. The catchment response can be divided into four phases: (1) soil moisture reservoir filling, (2) groundwater response, (3) surface depression filling and surface runoff and (4) backwater feedback. The first 3 5 mm of rainfall were stored in the soil without a significant increase in discharge. Relatively dry initial conditions (in comparison to those for past discharge extremes) prevented an even faster and more extreme hydrological response.

Original languageEnglish (US)
Pages (from-to)1991-2055
Number of pages65
JournalHydrology and Earth System Sciences
Volume15
Issue number6
DOIs
StatePublished - Dec 1 2011
Externally publishedYes

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flash flood
anatomy
catchment
rainfall
extreme event
soil moisture
hydrological response
groundwater
backwater
return period
gauge
flooding
radar
watershed
runoff
road
weather
soil

ASJC Scopus subject areas

  • Water Science and Technology
  • Earth and Planetary Sciences (miscellaneous)

Cite this

Brauer, C. C., Teuling, A. J., Overeem, A., Van Der Velde, Y., Hazenberg, P., Warmerdam, P. M. M., & Uijlenhoet, R. (2011). Anatomy of extraordinary rainfall and flash flood in a Dutch lowland catchment. Hydrology and Earth System Sciences, 15(6), 1991-2055. https://doi.org/10.5194/hess-15-1991-2011

Anatomy of extraordinary rainfall and flash flood in a Dutch lowland catchment. / Brauer, C. C.; Teuling, A. J.; Overeem, A.; Van Der Velde, Y.; Hazenberg, P.; Warmerdam, P. M.M.; Uijlenhoet, R.

In: Hydrology and Earth System Sciences, Vol. 15, No. 6, 01.12.2011, p. 1991-2055.

Research output: Contribution to journalArticle

Brauer, CC, Teuling, AJ, Overeem, A, Van Der Velde, Y, Hazenberg, P, Warmerdam, PMM & Uijlenhoet, R 2011, 'Anatomy of extraordinary rainfall and flash flood in a Dutch lowland catchment', Hydrology and Earth System Sciences, vol. 15, no. 6, pp. 1991-2055. https://doi.org/10.5194/hess-15-1991-2011
Brauer, C. C. ; Teuling, A. J. ; Overeem, A. ; Van Der Velde, Y. ; Hazenberg, P. ; Warmerdam, P. M.M. ; Uijlenhoet, R. / Anatomy of extraordinary rainfall and flash flood in a Dutch lowland catchment. In: Hydrology and Earth System Sciences. 2011 ; Vol. 15, No. 6. pp. 1991-2055.
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