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| Titel |
Analysis of flow signatures and catchment similarity indices for catchment classification in Yesilirmak Basin |
| VerfasserIn |
Batuhan Soyugur, Koray K. Yilmaz |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250145340
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| Publikation (Nr.) |
 EGU/EGU2017-9274.pdf |
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| Zusammenfassung |
| Catchment classification schemes aim to identify groups of hydrologically similar
catchments to enable a mapping between catchment physical characteristics and
hydro-climatic conditions with the catchment functioning. This mapping, together with the
quantified uncertainties, potentially facilitates improved process understanding, transfer
of this understanding to ungauged catchments, model parameter regionalization
and hence improve operational applications and watershed management. Although
many studies focusing on the topic of catchment classification exist in the literature,
there is yet no general consensus on the number and type of similarity metrics that
should be included in such analysis. The aim of this study is to first carefully derive
hydrologically relevant similarity metrics from catchment physical (elevation, area, slope,
geology, soils, land use etc.), climatic (seasonality, temperature, aridity index etc.)
and hydrologic response characteristics (flow signatures) and then utilize Affinity
Propagation clustering algorithm to determine the optimal number of groupings based on
individual as well as a combination of these similarity metrics. The study area is
comprised of 24 sub-catchments located in the Yesilirmak Basin, Turkey, where daily
streamflow and meteorological variables are available. The metrics that are based on flow
signatures summarize a number of behavioral functions of the watershed system
including those derived from flow duration curve (overall water balance, vertical
redistribution) as well as temporal redistribution of flow (seasonality etc.). Our initial results
indicated that inclusion of information on geology and seasonality (climate and flow)
appears to be promising in delineating the hydrologic functioning of the catchments. |
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