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Runoff and focused groundwater recharge response to flooding rains in the arid zone of Australia

Acworth, R. Ian; Rau, Gabriel C. 1; Cuthbert, Mark O.; Leggett, Keith; Andersen, Martin S.
1 Institut für Angewandte Geowissenschaften (AGW), Karlsruher Institut für Technologie (KIT)

A groundwater recharge investigation in the arid zone of Australia is presented. The investigation used a wide range of hydrogeological techniques including geological mapping, surface and borehole geophysics, groundwater hydraulics, streambed temperature and pressure monitoring, and hydrogeochemical and environmental tracer sampling, and it was complemented by analysis of rainfall intensity from 18 tipping-bucked rain gauges, climate data and stream runoff measurements. Run-off and recharge from a 200-mm rainfall event in January 2015, the largest daily rainfall in the local 50-year record, were investigated in detail. While this major storm provided substantial run-off as a potential source for focused, indirect recharge, it only produced enough actual recharge to the shallow aquifer to temporarily halt a long-term groundwater recession. A series of smaller rainfall-runoff events in 2016 produced a similar recharge response. The results suggest that the total magnitude of a flood event is not the main control on indirect groundwater recharge at this location. A deeper aquifer shows no hydraulic response to surface-water flow events and is isolated from the shallow system, consistent with its Pleistocene groundwater age. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000127132
Veröffentlicht am 21.03.2021
DOI: 10.1007/s10040-020-02284-x
Zitationen: 4
Web of Science
Zitationen: 4
Zitationen: 5
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Geowissenschaften (AGW)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 0941-2816, 1431-2174
KITopen-ID: 1000127132
Erschienen in Hydrogeology journal
Verlag Springer
Band 29
Heft 2
Seiten 737–764
Vorab online veröffentlicht am 07.01.2021
Schlagwörter Groundwater recharge/water budget, Rainfall/runoff, Equipment/field techniques, Geophysical methods, Australia
Nachgewiesen in Web of Science
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