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| Titel |
Understanding processes that generate flash floods in the arid Judean Desert
to the Dead Sea - a measurement network |
| VerfasserIn |
Hanna Hennig, Tino Rödiger, Jonathan B. Laronne, Stefan Geyer, Ralf Merz |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250126177
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| Publikation (Nr.) |
 EGU/EGU2016-5867.pdf |
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| Zusammenfassung |
| Flash floods in (semi-) arid regions are fascinating in their suddenness and can be harmful for
humans, infrastructure, industry and tourism. Generated within minutes, an early
warning system is essential. A hydrological model is required to quantify flash
floods. Current models to predict flash floods are often based on simplified concepts
and/or on concepts which were developed for humid regions. To more closely relate
such models to local conditions, processes within catchments where flash floods
occur require consideration. In this study we present a monitoring approach to
decipher different flash flood generating processes in the ephemeral Wadi Arugot on
the western side of the Dead Sea. To understand rainfall input a dense rain gauge
network was installed. Locations of rain gauges were chosen based on land use,
slope and soil cover. The spatiotemporal variation of rain intensity will also be
available from radar backscatter. Level pressure sensors located at the outlet of major
tributaries have been deployed to analyze in which part of the catchment water is
generated. To identify the importance of soil moisture preconditions, two cosmic
ray sensors have been deployed. At the outlet of the Arugot water is sampled and
level is monitored. To more accurately determine water discharge, water velocity is
measured using portable radar velocimetry. A first analysis of flash flood processes
will be presented following the FLEX-Topo concept .(Savenije, 2010), where each
landscape type is represented using an individual hydrological model according
to the processes within the three hydrological response units: plateau, desert and
outlet.
References:
Savenije, H. H. G.: HESS Opinions "Topography driven conceptual modelling
(FLEX-Topo)", Hydrol. Earth Syst. Sci., 14, 2681–2692, doi:10.5194/hess-14-2681-2010,
2010. |
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