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What can we learn from the projections of changes of flow patterns? Results from Polish case studies

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/persons/resource/Piniewski.Mikolaj

Piniewski,  Mikolaj
Potsdam Institute for Climate Impact Research;

Kidane Meresa,  H.
External Organizations;

Romanowicz,  R.
External Organizations;

Osuch,  M.
External Organizations;

Szczesniak,  M.
External Organizations;

Kardel,  I.
External Organizations;

Okruszko,  T.
External Organizations;

Mezghani,  A.
External Organizations;

/persons/resource/zbyszek

Kundzewicz,  Zbigniew W.
Potsdam Institute for Climate Impact Research;

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Zitation

Piniewski, M., Kidane Meresa, H., Romanowicz, R., Osuch, M., Szczesniak, M., Kardel, I., Okruszko, T., Mezghani, A., Kundzewicz, Z. W. (2017): What can we learn from the projections of changes of flow patterns? Results from Polish case studies. - Acta Geophysica, 65, 4, 809-827.
https://doi.org/10.1007/s11600-017-0061-6


Zitierlink: https://publications.pik-potsdam.de/pubman/item/item_21777
Zusammenfassung
River flow projections for two future time horizons and RCP 8.5 scenario, generated by two projects (CHASE-PL and CHIHE) in the Polish-Norwegian Research Programme, were compared. The projects employed different hydrological models over different spatial domains. The semi-distributed, process-based, SWAT model was used in the CHASE-PL project for the entire Vistula and Odra basins area, whilst the lumped, conceptual, HBV model was used in the CHIHE project for eight Polish catchments, for which the comparison study was made. Climate projections in both studies originated from the common EURO-CORDEX dataset, but they were different, e.g. due to different bias correction approaches. Increases in mean annual and seasonal flows were projected in both studies, yet the magnitudes of changes were largely different, in particular for the lowland catchments in the far future. The HBV-based increases were significantly higher in the latter case than the SWAT-based increases in all seasons except winter. Uncertainty in projections is high and creates a problem for practitioners.