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| Titel |
A process-based typology of hydrological drought |
| VerfasserIn |
A. F. Loon, H. A. J. Lanen |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 16, no. 7 ; Nr. 16, no. 7 (2012-07-06), S.1915-1946 |
| Datensatznummer |
250013357
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| Publikation (Nr.) |
 copernicus.org/hess-16-1915-2012.pdf |
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| Zusammenfassung |
| Hydrological drought events have very different causes and
effects. Classifying these events into distinct types can be useful
for both science and management. We propose a
hydrological drought typology that is based on governing drought
propagation processes derived from catchment-scale drought analysis.
In this typology six hydrological drought
types are distinguished, i.e. (i) classical rainfall deficit
drought, (ii) rain-to-snow-season drought, (iii) wet-to-dry-season drought, (iv) cold snow season
drought, (v) warm snow season drought, and (vi)
composite drought. The processes underlying these drought
types are the result of the interplay of temperature and precipitation
at catchment scale in different seasons. As a test case, about 125
groundwater droughts and 210 discharge droughts in five
contrasting headwater catchments in Europe have been classified. The
most common drought type in all catchments was the classical rainfall
deficit drought (almost 50% of all events), but in the selected
catchments these were mostly minor events. If only the five most severe
drought events of each catchment are considered, a shift towards more
rain-to-snow-season droughts, warm snow season
droughts, and composite droughts was found. The occurrence of
hydrological drought types is determined by climate and catchment
characteristics. The drought typology is transferable to other catchments,
including outside Europe, because it is generic and based upon processes
that occur around the world. A general framework is proposed to
identify drought type occurrence in relation to climate and catchment
characteristics. |
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