Application of new point measurement device to quantify groundwater-surface water interactions

Abstract

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A Comparison of Tools and Methods for Estimating Groundwater‐Surface Water Exchange

“…Both devices estimate groundwater velocity using a mini‐tracer test on the probe surface, which leads to velocity estimations that are independent of Darcy's Law calculations, and therefore provide a useful complement to established methods (Labaky et al ; Devlin et al ). Early testing provided encouraging evidence that the SBPVP was a viable tool with a range of operation of at least 18 to 2700 cm/d (Cremeans and Devlin ; Cremeans et al ). The SBPVP was designed for use in unconsolidated material and is expected to be most effective in sandy sediments (Cremeans and Devlin ).…”

“…Recently, work aimed at developing and testing the SBPVP validated the new instrument against temperature profiling, and Darcy calculations based on data from minipiezometers (Cremeans and Devlin ; Cremeans et al ). That work indicated good agreement between the Darcy flow estimates and SBPVP estimates; temperature profiling resulted in pronounced underestimates of groundwater discharge rates compared to the other methods.…”

“…In this work, conducted in August, 2016, the upper layer of Quaternary sands that form the bed of the Grindsted Å were studied. The work focused on the bed nearest the north bank of the stream, along a well‐studied meander (Rønde et al ; Sonne et al ; Cremeans et al ). Each of the four methods to be compared (head measurements followed by Darcy‐based calculations, temperature profilers, seepage meters and SBPVPs) were deployed at six equidistant measurement locations, spaced 3 m apart (Figure ).…”

“…It is acknowledged that grain size analyses can only provide preliminary estimations of K , so slug test results from the immediate study area, previously reported by Cremeans et al (), were used to support all Darcy calculations (Figure ). Based on prior investigations of this site (Rønde et al ), flow rates through the streambed were expected to be about 100 cm/d on average.…”

Assessing surface water–groundwater interactions in a complex river‐floodplain wetland‐isolated lake system

“…However, all of these approaches suffer from limitations associated with their spatial and temporal scales and underlying assumptions (Cremeans, Devlin, McKnight, & Bjerg, ; Hatch et al, ). These uncertainties are mainly attributable to disturbance of the flow path, small‐scale spatial heterogeneities, and design limitations of measurement devices (Cremeans et al, ).…”