Preprints
https://doi.org/10.5194/hess-2016-683
https://doi.org/10.5194/hess-2016-683

  09 Jan 2017

09 Jan 2017

Review status: this discussion paper is a preprint. It has been under review for the journal Hydrology and Earth System Sciences (HESS). The manuscript was not accepted for further review after discussion.

Scaling down hyporheic exchange flows: from catchments to reaches

Chiara Magliozzi1, Robert Grabowski1, Aaron I. Packman2, and Stefan Krause3 Chiara Magliozzi et al.
  • 1Cranfield Water Science Institute, Cranfield University, Cranfield, MK43 0AL, UK
  • 2Department of Civil and Environmental Engineering, Northwestern University, Evanston, Illinois, USA
  • 3School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK

Abstract. Rivers are not isolated systems but continuously interact with the subsurface from upstream to downstream. In the last few decades, research on the hyporheic zone (HZ) from many perspectives has increased appreciation of the hydrological importance and ecological significance of connected river and groundwater systems. Although recent reviews, modelling and field studies have explored hydrological, biogeochemical and ecohydrological processes in the HZ at relatively small scales (bedforms to reaches), a comprehensive understanding of the factors driving the hyporheic exchange flows (HEF) at larger scales is still missing. To date, there is fragmentary information on how hydroclimatic, hydrogeologic, topographic, anthropogenic and ecological factors interact to drive hyporheic exchange flows at large scales. Further evidence is needed to link hyporheic exchange flows across scales. This review aims to conceptualize interacting factors at catchment, valley and reach scales that control spatial and temporal variations in hyporheic exchange flows. The implications of these drivers are discussed for each scale, and co-occurrences across scale are highlighted in a case of study. By using a multi-scale perspective, this review connects field observations and modelling studies to identify broad and general patterns of HEF in different catchments. This multi-scale perspective is useful to devise approaches to interpret hyporheic exchange across multiscale heterogeneities, to infer scaling relationships, and to inform watershed management decisions.

Chiara Magliozzi et al.

 
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Chiara Magliozzi et al.

Chiara Magliozzi et al.

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Short summary
A critical review of recent literature details how drivers operating at catchment, valley and reach scales are responsible of variations in space and time in the hyporheic exchange. It is based on cross-disciplinary understanding of environmental topics from published reviews and field studies placed within a hierarchical framework. The outcomes will benefit hyporheic research and catchment managers by providing an integrated approach of the drivers of hyporheic exchange in space and time.