KIT | KIT-Bibliothek | Impressum | Datenschutz

Mobilisation or dilution? Nitrate response of karst springs to high rainfall events

Huebsch, M.; Fenton, O.; Horan, B.; Hennessy, D.; Richards, K. G.; Jordan, P.; Goldscheider, N.; Butscher, C.; Blum, P.

Abstract:
Nitrate (NO3-) contamination of groundwater associated with agronomic activity is of major concern in many countries. Where agriculture, thin free draining soils and karst aquifers coincide, groundwater is highly vulnerable to nitrate contamination. As residence times and denitrification potential in such systems are typically low, nitrate can discharge to surface waters unabated. However, such systems also react quickest to agricultural management changes that aim to improve water quality. In response to storm events, nitrate concentrations can alter significantly, i.e. rapidly decreasing or increasing concentrations. The current study examines the response of a specific karst spring situated on a grassland farm in South Ireland to rainfall events utilising high-resolution nitrate and discharge data together with on-farm borehole groundwater fluctuation data. Specifically, the objectives of the study are to formulate a scientific hypothesis of possible scenarios relating to nitrate responses during storm events, and to verify this hypothesis using additional case studies from the literature. This elucidates the controlling key factors that lead to mobilisation and/or dilution of nitrate concentrations during storm events. ... mehr

Open Access Logo


Verlagsausgabe §
DOI: 10.5445/IR/1000046048
Veröffentlicht am 21.12.2018
Originalveröffentlichung
DOI: 10.5194/hess-18-4423-2014
Scopus
Zitationen: 28
Web of Science
Zitationen: 26
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Geowissenschaften (AGW)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2014
Sprache Englisch
Identifikator ISSN: 1027-5606, 1607-7938
urn:nbn:de:swb:90-460488
KITopen-ID: 1000046048
HGF-Programm 35.14.01 (POF II, LK 01)
Erschienen in Hydrology and earth system sciences
Band 18
Heft 11
Seiten 4423-4435
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Nachgewiesen in Scopus
Web of Science
Relationen in KITopen
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page