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Velocities, celerities and the basin of attraction in catchment response
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL. Univ Lancaster, Lancaster Environm Ctr, Lancaster LA1 4YQ, England.;Univ Lausanne, IDYST, Lausanne, Switzerland..
Univ Lancaster, Lancaster Environm Ctr, Lancaster LA1 4YQ, England..
2015 (English)In: Hydrological Processes, ISSN 0885-6087, E-ISSN 1099-1085, Vol. 29, no 25, 5214-5226 p.Article in journal (Refereed) PublishedText
Abstract [en]

Catchment systems are interestingly nonlinear, but their dynamics are constrained from being unduly chaotic by mass and energy balance requirements. There have been no attempts in hydrology that we know of that have tried to map both the flow and transport dynamics of a catchment in any form of phase space. In part, this is because of the high dimensionality of the space-time patterns of response; in part because there is sufficient uncertainty about the input and output fluxes estimated by measurement that this might be expected to obscure any attractor-like behaviour. In this study we explore the basin of the catchment attractor for the Multiple Interacting Pathway (MIPs) model that in previous papers has been shown to give good results for the small Gardsjon catchment in Sweden. MIPs is based on particle tracking techniques and gives results for both the flow responses and for the travel and residence time responses of water in the catchment. Here it is used to provide consistent values of fluxes, total storage, travel time distributions and residence time distributions for a long simulation period. The nature of those responses in storage and input dimensions is then investigated. The results suggest that the range of behaviours is hysteretic in interesting ways and constrained by the forcing inputs, with space filling of trajectories in the basin of attraction as should be expected of a forced dissipative system. The range of behaviours exhibited defines a space that the responses of any simpler emulator model will need to span.

Place, publisher, year, edition, pages
2015. Vol. 29, no 25, 5214-5226 p.
Keyword [en]
nonlinearity, basin of attraction, travel times, residence times, hysteresis, storage-discharge
National Category
Oceanography, Hydrology, Water Resources
URN: urn:nbn:se:uu:diva-276877DOI: 10.1002/hyp.10699ISI: 000368277500007OAI: oai:DiVA.org:uu-276877DiVA: diva2:903698
Available from: 2016-02-16 Created: 2016-02-16 Last updated: 2016-02-16Bibliographically approved

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