DBPapers
DOI: 10.5593/SGEM2016/HB33/S02.006

ASSESSMENT OF THE PERFORMANCE OF A HYDROLOGICAL MODEL IN RELATION TO SELECTED CLIMATIC CHARACTERISTICS

P. Sleziak, J. Szolgay, K. Hlavcova, J. Parajka
Friday 11 November 2016

References: 16th International Multidisciplinary Scientific GeoConference SGEM 2016, SGEM Vienna GREEN Extended Scientific Sessions, www.sgemviennagreen.org, SGEM2016 Conference Proceedings, ISBN 978-619-7105-81-0 / ISSN 1314-2704, 2 - 5 November, 2016, Book 3 Vol. 3, 43-52pp, DOI: 10.5593/SGEM2016/HB33/S02.006

ABSTRACT

The performance of hydrological models in changing climate conditions is a frequent topic of recent scientific studies. There are many calibration procedures and strategies, but reaching clear conclusions on this topic is not easily achievable. In this paper we investigate the performance of a conceptual-rainfall runoff model (TUW model) under changing climate conditions. The TUW model was calibrated for three climatically contrasting periods between 1981-2010 in different groups of Austrian catchments (snow, runoff, and soil catchments). A combination of the Nash-Sutcliffe coefficient (NSE) and the logarithmic Nash-Sutcliffe coefficient (logNSE) was used for the parametrization of the model. In the first part of the study we assessed the model’s performance in terms of NSE. We found that the model reached higher values of NSE in snow/runoff catchments. To the contrary, lower values of NSE were reached in soil catchments. These findings are demonstrated on the cumulative distribution function curves calculated for the catchments, which represent different climate and physiographic conditions of Austria.
Next, we analyzed the relationship between the model’s performance in validation and the changes in the selected climatic characteristics (precipitation and air temperature) for three different groups of Austrian catchments. The results indicate that some of the changes in the climatic characteristics correspond to the changes in NSE. They showed that when the change in climatic characteristics was higher, the NSE achieved lower values. To the contrary, when the change in climatic characteristics was lower, the NSE achieved higher values. The uncertainties of the model’s performance in the context of climate change are discussed.

Keywords: TUW model, climate change, Nash-Sutcliffe coefficient, logarithmic Nash-Sutcliffe coefficient

PAPER DOI: 10.5593/SGEM2016/HB33/S02.006, ASSESSMENT OF THE PERFORMANCE OF A HYDROLOGICAL MODEL IN RELATION TO SELECTED CLIMATIC CHARACTERISTICS

35 EURO ADD TO CART


Your cart ( items)

Subtotal:
Tax cost ():
Shipping cost:
Total:
Checkout Empty