Scale‐Free Structure of Surface‐Water Connectivity Within a Lowland River‐Floodplain Landscape

2020 ◽  
Vol 47 (16) ◽  
Author(s):  
Cesar R. Castillo ◽  
İnci Güneralp ◽  
Billy Hales ◽  
Burak Güneralp
Keyword(s):  
Surface Water ◽  
Lowland River ◽  
River Floodplain ◽  
Scale Free

scholarly journals Phosphorus Load to Surface Water from Bank Erosion in a Danish Lowland River Basin

2012 ◽  
Vol 41 (2) ◽  
pp. 304-313 ◽  
Author(s):  
Brian Kronvang ◽  
Joachim Audet ◽  
Annette Baattrup-Pedersen ◽  
Henning S. Jensen ◽  
Søren E. Larsen
Keyword(s):  
Surface Water ◽  
River Basin ◽  
Bank Erosion ◽  
Lowland River ◽  
Phosphorus Load

scholarly journals Investigating patterns and controls of groundwater up-welling in a lowland river by combining Fibre-optic Distributed Temperature Sensing with observations of vertical hydraulic gradients

2012 ◽  
Vol 16 (6) ◽  
pp. 1775-1792 ◽  
Author(s):  
S. Krause ◽  
T. Blume ◽  
N. J. Cassidy
Keyword(s):  
Surface Water ◽  
Water Exchange ◽  
Structural Heterogeneity ◽  
Temperature Sensing ◽  
Small Scale ◽  
Lowland River ◽  
Fibre Optic ◽  
Distributed Temperature Sensing ◽  
Hydraulic Gradients ◽  
Cold Spots

Abstract. This paper investigates the patterns and controls of aquifer–river exchange in a fast-flowing lowland river by the conjunctive use of streambed temperature anomalies identified with Fibre-optic Distributed Temperature Sensing (FO-DTS) and observations of vertical hydraulic gradients (VHG). FO-DTS temperature traces along this lowland river reach reveal discrete patterns with "cold spots" indicating groundwater up-welling. In contrast to previous studies using FO-DTS for investigation of groundwater–surface water exchange, the fibre-optic cable in this study was buried in the streambed sediments, ensuring clear signals despite fast flow and high discharges. During the observed summer baseflow period, streambed temperatures in groundwater up-welling locations were found to be up to 1.5 °C lower than ambient streambed temperatures. Due to the high river flows, the cold spots were sharp and distinctly localized without measurable impact on down-stream surface water temperature. VHG patterns along the stream reach were highly variable in space, revealing strong differences even at small scales. VHG patterns alone are indicators of both, structural heterogeneity of the stream bed as well as of the spatial heterogeneity of the groundwater–surface water exchange fluxes and are thus not conclusive in their interpretation. However, in combination with the high spatial resolution FO-DTS data we were able to separate these two influences and clearly identify locations of enhanced exchange, while also obtaining information on the complex small-scale streambed transmissivity patterns responsible for the very discrete exchange patterns. The validation of the combined VHG and FO-DTS approach provides an effective strategy for analysing drivers and controls of groundwater–surface water exchange, with implications for the quantification of biogeochemical cycling and contaminant transport at aquifer–river interfaces.

scholarly journals Impacts of hydrological restoration on lowland river floodplain plant communities

2020 ◽  
Vol 28 (3) ◽  
pp. 403-417
Author(s):  
Daniel R. Richards ◽  
Helen L. Moggridge ◽  
Philip H. Warren ◽  
Lorraine Maltby
Keyword(s):  
Plant Communities ◽  
Lowland River ◽  
River Floodplain

scholarly journals Correction to: Impacts of hydrological restoration on lowland river floodplain plant communities

2020 ◽  
Vol 28 (3) ◽  
pp. 419-419
Author(s):  
Daniel R. Richards ◽  
Helen L. Moggridge ◽  
Philip H. Warren ◽  
Lorraine Maltby
Keyword(s):  
Plant Communities ◽  
Lowland River ◽  
River Floodplain

scholarly journals Restoring dissolved organic carbon subsidies from floodplains to lowland river food webs: a role for environmental flows?

2016 ◽  
Vol 67 (9) ◽  
pp. 1387 ◽  
Author(s):  
Darren S. Baldwin ◽  
Matthew J. Colloff ◽  
Simon M. Mitrovic ◽  
Nick R. Bond ◽  
Ben Wolfenden
Keyword(s):  
Food Webs ◽  
Environmental Flows ◽  
Ecological Condition ◽  
Lowland River ◽  
River Channels ◽  
Apparent Lack ◽  
River Floodplain ◽  
Main River ◽  
Main River Channel ◽  
Terrestrial Subsidies

Environmental flows are managed events in river systems designed to enhance the ecological condition of aquatic ecosystems. Although not traditionally seen as important in lowland rivers, there is mounting evidence that terrestrial subsidies can be an important energy source in aquatic metazoan food webs. We argue that the apparent lack of importance of terrestrial subsidies to many lowland river food webs may reflect an artefact resulting from historical anthropogenic changes to lowland river–floodplain ecosystems, including the loss of lateral connectivity between rivers and their floodplains, changes in floodplain land use and carbon stores, and loss of sites of transformation within the main channel. The loss of floodplain subsidies to the main river channel can be partially redressed using environmental flows; however, this will require mimicking important aspects of natural high-flow events that have hitherto been overlooked when targeting environmental flows to a limited suite of biota. We suggest that key biotic targets for environmental flow releases may not be achievable unless river–floodplain subsidies are sufficiently restored. Environmental flows can go some way to addressing this shortfall, but only if floodplain subsidies to river channels are explicitly included in the design and management of environmental flows.

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