IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 34th Congress - Brisbane (2011) : THEME 3: Water and Carbon: Climate Change Impact : Battling hydrological monsters: insights into numerical approximations, data uncertainty and structu...
Battling hydrological monsters: insights into numerical approximations, data uncertainty and structural errors
Author : Dmitri Kavetski1 , Guillaume Evin1 , Martyn P. Clark2 , Mark A. Thyer3 , George Kuczera1 , Benjamin Renard4 , Fabrizio Fenicia5 and Narendra Tuteja6
Confronted with poor model performance, the Hydrologist has blamed data errors, non- Gaussianities, model nonlinearities, parameter uncertainty, and just about everything else from Pandorra's box. Moreover, recent work has suggested astonishing numerical artefacts may arise from poor model implementation. Yet progress in hydrology requires reducing predictive errors and disentangling individual sources of uncertainty. How can this be accomplished? First, robust and efficient numerical methods are needed to avoid unnecessary artefacts. Second, the formidable interaction between data and structural errors, irresolvable in the absence of independent knowledge, can be approached using statistical analysis of rain- and stream- gauge networks. Structural errors, a key unresolved challenge, can then be explored using flexible model configurations, paving the way for more stringent hypothesis-testing. Importantly, informative diagnostic measures are available for each component of the analysis. This paper surveys recent developments along these research directions in conceptual hydrological modelling and indicates areas of ongoing and future interest.
File Size : 434,355 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 34th Congress - Brisbane (2011)
Article : THEME 3: Water and Carbon: Climate Change Impact
Date Published : 01/07/2011
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