Uncertainty of modelled flow regime for flow-ecological assessment in Southern Europe

The Science of the Total Environment
Olga VigiakA Pistocchi

Abstract

Sustainable water basin management requires characterization of flow regime in river networks impacted by anthropogenic pressures. Flow regime in ungauged catchments under current, future, or natural conditions can be assessed with hydrological models. Developing hydrological models is, however, resource demanding such that decision makers might revert to models that have been developed for other purposes and are made available to them ('off-the-shelf' models). In this study, the impact of epistemic uncertainty of flow regime indicators on flow-ecological assessment was assessed at selected stations with drainage areas ranging from about 400 to almost 90,000km2 in four South European basins (Adige, Ebro, Evrotas and Sava). For each basin, at least two models were employed. Models differed in structure, data input, spatio-temporal resolution, and calibration strategy, reflecting the variety of conditions and purposes for which they were initially developed. The uncertainty of modelled flow regime was assessed by comparing the modelled hydrologic indicators of magnitude, timing, duration, frequency and rate of change to those obtained from observed flow. The results showed that modelled flow magnitude indicators at medium and hig...Continue Reading

Citations

Aug 7, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·B S ChoudriMushtaque Ahmed
Mar 25, 2018·The Science of the Total Environment·Gabriele ChiognaYe Tuo
Jul 6, 2021·Ecological Indicators·Olga VigiakBruna Grizzetti
Aug 29, 2021·The Science of the Total Environment·Luke M BowerMark C Scott

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