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Spatial Moments of Catchment Rainfall: Rainfall Spatial Organisation, Basin Morphology, and Flood Response : Volume 8, Issue 3 (21/06/2011)

By Zoccatelli, D.

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Book Id: WPLBN0004012951
Format Type: PDF Article :
File Size: Pages 37
Reproduction Date: 2015

Title: Spatial Moments of Catchment Rainfall: Rainfall Spatial Organisation, Basin Morphology, and Flood Response : Volume 8, Issue 3 (21/06/2011)  
Author: Zoccatelli, D.
Volume: Vol. 8, Issue 3
Language: English
Subject: Science, Hydrology, Earth
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2011
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Viglione, A., Chirico, G. B., Blöschl, G., Zoccatelli, D., & Borga, M. (2011). Spatial Moments of Catchment Rainfall: Rainfall Spatial Organisation, Basin Morphology, and Flood Response : Volume 8, Issue 3 (21/06/2011). Retrieved from http://ebook.worldlibrary.net/


Description
Description: Department of Land and Agroforest Environment, University of Padova, Italy. This paper provides a general analytical framework for assessing the dependence existing between spatial rainfall organisation, basin morphology and runoff response. The analytical framework builds upon a set of spatial rainfall statistics (termed spatial moments of catchment rainfall) which describe the spatial rainfall organisation in terms of concentration and dispersion statistics as a function of the distance measured along the flow routing coordinate. The introduction of these statistics permits derivation of a simple relationship for the quantification of storm velocity at the catchment scale. The paper illustrates the development of the analytical framework and explains the conceptual meaning of the statistics by means of application to five extreme flash floods occurred in various European regions in the period 2002–2007. High resolution radar rainfall fields and a distributed hydrologic model are employed to examine how effective are these statistics in describing the degree of spatial rainfall organisation which is important for runoff modelling. This is obtained by quantifying the effects of neglecting the spatial rainfall variability on flood modelling, with a focus on runoff timing. The size of the study catchments ranges between 36 to 982 km2. The analysis reported here shows that the spatial moments of catchment rainfall can be effectively employed to isolate and describe the features of rainfall spatial organization which have significant impact on runoff simulation. These statistics provide essential information on what space-time scales rainfall has to be monitored, given certain catchment and flood characteristics, and what are the effects of space-time aggregation on flood response modeling.

Summary
Spatial moments of catchment rainfall: rainfall spatial organisation, basin morphology, and flood response

Excerpt
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