Technical note: testing an improved index for analysing storm nutrient hysteresis
Technical note: testing an improved index for analysing storm nutrient hysteresis
Analysis of hydrochemical behaviour during storm events can provide new insights into the process controls on nutrient transport in catchments. The examination of storm behaviours using hysteresis analysis has increased in recent years, partly due to the increased availability of high temporal resolution data sets for discharge and water quality parameters. A number of these analyses involve the use of an index to describe the characteristics of a hysteresis loop in order to compare storm behaviours both within and between catchments. This technical note reviews the methods for calculation of the hysteresis index (HI) and explores a new more effective methodology. Each method is systematically tested and the impact of the chosen calculation on the results is examined. Recommendations are made regarding the most effective method of calculating a HI which can be used for comparing data between storms and between different water quality parameters and catchments.
7875-7892
Lloyd, C. E. M.
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Freer, J. E.
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Johnes, P. J.
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Collins, A. L.
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13 August 2015
Lloyd, C. E. M.
55b165eb-f156-42b4-9ef5-b84881a640ed
Freer, J. E.
338b5dd6-83a7-43a3-901d-d8ed2b00233b
Johnes, P. J.
dd7c0c67-9deb-45bd-80e9-2362f5fb2294
Collins, A. L.
0ab4072f-a112-48e5-9625-1d229aa63660
Lloyd, C. E. M., Freer, J. E., Johnes, P. J. and Collins, A. L.
(2015)
Technical note: testing an improved index for analysing storm nutrient hysteresis.
Hydrology and Earth System Sciences Discussions, 12 (8), .
(doi:10.5194/hessd-12-7875-2015).
Abstract
Analysis of hydrochemical behaviour during storm events can provide new insights into the process controls on nutrient transport in catchments. The examination of storm behaviours using hysteresis analysis has increased in recent years, partly due to the increased availability of high temporal resolution data sets for discharge and water quality parameters. A number of these analyses involve the use of an index to describe the characteristics of a hysteresis loop in order to compare storm behaviours both within and between catchments. This technical note reviews the methods for calculation of the hysteresis index (HI) and explores a new more effective methodology. Each method is systematically tested and the impact of the chosen calculation on the results is examined. Recommendations are made regarding the most effective method of calculating a HI which can be used for comparing data between storms and between different water quality parameters and catchments.
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Published date: 13 August 2015
Organisations:
Geography & Environment
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Local EPrints ID: 389600
URI: http://eprints.soton.ac.uk/id/eprint/389600
ISSN: 1812-2116
PURE UUID: 72b123ee-ca79-48ea-9ef9-a76afc033ab0
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Date deposited: 09 Mar 2016 13:29
Last modified: 14 Mar 2024 23:05
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Author:
C. E. M. Lloyd
Author:
J. E. Freer
Author:
P. J. Johnes
Author:
A. L. Collins
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