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  Information - HS47 Regional Prediction of Hydrological Extremes at Ungauged Sites (co-listed in NH)

Event Information
A large group of researchers and hydrologists from all around the world is dedicating a great deal of attention to the problem of predictions in ungauged basins. Evidence of the liveliness of this research sector can be found in the initiative titled: Decade on Prediction in Ungauged Basins (PUB), a wide research project promoted by the International Association of Hydrological Sciences (IAHS) [e.g., Sivapalan et al., Hydrol. Sci. J., 48(6), 2003]. A fundamental branch of this broad topic is represented by the estimation of design events at ungauged sites. There is a general consensus among researchers that Regional Frequency Analysis (RFA) of hydrological extremes (i.e., flood flows, droughts and rainstorms) represents one of the most viable approaches for pursuing this task. Among the most interesting issues concerning RFA of hydrological extremes, the scientific literature points out several priority problems, three of which are specifically addressed by the present session: i) development of objective and process-based classification criteria (or pooling techniques) to form hydrologically homogeneous pooling groups of sites (i.e., catchments for regional frequency analysis of floods and low-flows; raingauges for regional frequency analysis of rainstorms); ii) identification of effective procedures for testing the homogeneity of pooling groups; iii) assessment of the impact of intersite correlation on the information content of regional samples and uncertainty associated with regional estimates. Contributions addressing one or more of these points are welcome. Session format: Poster session introduced by a compact oral session including a few solicited contributions addressing the session's keynotes (30 min. each), a series of short oral presentations of posters (5 min. each), and an open discussion.

Preliminary List of Solicited Speakers
Günter Blöschl and Ralf Merz
"Process information in operational flood regionalisation"
(Institute of Hydraulic and Water Resources Engineering Vienna University of Technology)

Donald H. Burn
"Focused on the ungauged: focused pooling approaches for estimating extremes at ungauged catchments"
(University of Waterloo, Canada)

Henrik Madsen
(DHI Water & Environment, Denmark)


General Statement
The information contained hereafter has been compiled and uploaded by the Session Organizers via the "Organizer Session Form". The Session Organizers have therefore the sole responsibility that this information is true and accurate at the date of publication, and the conference organizer cannot accept any legal responsibility for any errors or omissions that may be made, and he makes no warranty, expressed or implied, with regard to the material published.

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