Advances in Geosciences
www.adv-geosci.net
1680-7340
1680-7359
9
Integration of hydrological models on different spatial and temporal scales
2006
10.5194/adgeo-9-25-2006
http://www.adv-geosci.net/9/25/2006/
http://www.adv-geosci.net/9/25/2006/adgeo-9-25-2006.html
http://www.adv-geosci.net/9/25/2006/adgeo-9-25-2006.pdf
25
29
2006-09-26
Radar rainfall estimates in an alpine environment using inverse hydrological modelling
A. Marx
andreas.marx@imk.fzk.de
H. Kunstmann
A. Bárdossy
J. Seltmann
Karlsruhe Research Center, Institute for Meteorology and Climate Research, Garmisch-Partenkirchen, Germany
University of Stuttgart, Institute of Hydraulic Engineering, Germany
German Weather Service, Meteorological Observatory Hohenpeissenberg, Germany
The quality of hydrological modelling is limited due to the restricted
availability of high resolution temporal and spatial input data such as
temperature, global radiation, and precipitation. Radar-based rain
measurements provide good spatial information. On the other hand, using radar
data is accompanied by basic difficulties such as clutter, shielding,
variations of <i>Z/R</i>-relationships, beam-resolution and attenuation. Instead of
accounting for all errors involved separately, a robust <i>Z/R</i>-relationship is
estimated in this study for the short range (up to 40 km distance)
using inverse hydrological modelling for a continuous period of three months
in summer 2001. River gauge measurements from catchment sizes around
100 km<sup>2</sup> are used to estimate areal precipitation and finally
<i>Z/R</i>-relationships using a calibrated hydrological model. The study is
performed in the alpine Ammer catchment with very short reaction times of the
river gauges to rainfall events.
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