<scp>1DTempPro V2</scp>: New Features for Inferring Groundwater/Surface‐Water Exchange

Koch, Franklin W.; Voytek, Emily B.; Day‐Lewis, Frederick D.; Healy, Richard W.; Briggs, Martin A.; Lane, John W.; Werkema, D. Dale

doi:10.1111/gwat.12369

Cited by 55 publications

(40 citation statements)

References 15 publications

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“…Voytek et al (2013) developed the free, stand-alone GUI 1DTempPro, which is based on the 2D Code VS2DH (Healy & Ronan, 1996) to estimate one vertical fluid flux for the given temperature time series based on a manual parameter optimization. 1DTempPro has been augmented to include automated parameter estimation, layer heterogeneity, and time-varying fluid flux estimation (Koch et al, 2015). However, the functionality of 1DTempPro to estimate variable fluid flux requires manual adjustment of fluid flux with time by point and click via a simple graphical interface or alternatively initial estimates of time-varying exchange flux (Koch et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…1DTempPro has been augmented to include automated parameter estimation, layer heterogeneity, and time-varying fluid flux estimation (Koch et al, 2015). However, the functionality of 1DTempPro to estimate variable fluid flux requires manual adjustment of fluid flux with time by point and click via a simple graphical interface or alternatively initial estimates of time-varying exchange flux (Koch et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Estimation of vertical water fluxes from temperature time series by the inverse numerical computer program FLUX‐BOT

Munz

Schmidt

2017

Hydrological Processes

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The application of heat as a hydrological tracer has become a standard method for quantifying water fluxes between groundwater and surface water. The typical application is to estimate vertical water fluxes in the shallow subsurface beneath streams or lakes. For this purpose, time series of temperatures in the surface water and in the sediment are measured and evaluated by a vertical 1D representation of heat transport by advection and conduction. Several analytical solutions exist to calculate the vertical water flux from the measured temperatures. Although analytical solutions can be easily implemented, they are restricted to specific boundary conditions such as a sinusoidal upper temperature boundary. Numerical solutions offer higher flexibility in the selection of the boundary conditions. This, in turn, reduces the effort of data preprocessing, such as the extraction of the diurnal temperature variation from the raw data. Here, we present software to estimate water fluxes based on temperatures—FLUX‐BOT. FLUX‐BOT is a numerical code written in MATLAB that calculates vertical water fluxes in saturated sediments based on the inversion of measured temperature time series observed at multiple depths. FLUX‐BOT applies a centred Crank–Nicolson implicit finite difference scheme to solve the one‐dimensional heat advection–conduction equation. FLUX‐BOT includes functions for the inverse numerical routines, functions for visualizing the results, and a function for performing uncertainty analysis. We present applications of FLUX‐BOT to synthetic and to real temperature data to demonstrate its performance.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Estimation of vertical water fluxes from temperature time series by the inverse numerical computer program FLUX‐BOT

Munz

Schmidt

2017

Hydrological Processes

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“…While we acknowlege that there are generally more scientific papers being published on many topics every year, Figure 3 demonstrates the sharp resurgance in academic interest on this topic following the review paper by Anderson (2005). These concepts have been built into free, downloadable software packages, such as VFLUX 2 (Irvine et al 2015) that use analytical approaches or numerical solutions such as those applied in 1DTempPro (Koch et al 2016). Most post-2005 academic studies that focused on the use of heat as a groundwater tracer were groundwater-surface water interaction studies that relied on temperaturetime approaches (Figure 2c and 2d).…”

Section: Heat As a Groundwater Tracermentioning

confidence: 99%

Heat: An Overlooked Tool in the Practicing Hydrogeologist's Toolbox

Kurylyk¹,

Irvine

2019

Groundwater

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“…In general, either homogeneous (Bredehoeft & Papadopulos, 1965) or multilayer (Shan & Bodvarsson, 2004) steady state methods can be employed depending on whether the thermal conductivity profile obtained from the heat pulse decay exhibits pronounced heterogeneity. If the domain is both transient and heterogeneous, a numerical thermal tracing model should be employed (Koch et al, 2016;Munz & Schmidt, 2017;Wilson et al, 2016). Options for using ocean sediment temperature profiles to trace submarine groundwater flow based on the timescale of data availability are shown in Figure 3.…”

Section: Temporal Considerations For Data Collection and Appropriate mentioning

confidence: 99%

Rethinking the Use of Seabed Sediment Temperature Profiles to Trace Submarine Groundwater Flow

Kurylyk

Irvine

Mohammed

et al. 2018

Water Resources Research

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Submarine groundwater fluxes across the seafloor facilitate important hydrological and biogeochemical exchanges between oceans and seabed sediment, yet few studies have investigated spatially distributed groundwater fluxes in deep‐ocean environments such as continental slopes. Heat has been previously applied as a submarine groundwater tracer using an analytical solution to a heat flow equation assuming steady state conditions and homogeneous thermal conductivity. These assumptions are often violated in shallow seabeds due to ocean bottom temperature changes or sediment property variations. Here heat tracing analysis techniques recently developed for terrestrial settings are applied in concert to examine the influences of groundwater flow, ocean temperature changes, and seabed thermal conductivity variations on deep‐ocean sediment temperature profiles. Temperature observations from the sediment and bottom ocean water on the Scotian Slope off eastern Canada are used to demonstrate how simple thermal methods for tracing groundwater can be employed if more comprehensive techniques indicate that the simplifying assumptions are valid. The spatial distribution of the inferred groundwater fluxes on the slope suggests a downward groundwater flow system with recharge occurring over the upper‐middle slope and discharge on the lower slope. We speculate that the downward groundwater flow inferred on the Scotian Slope is due to density‐driven processes arising from underlying salt domes, in contrast with upward slope systems driven by geothermal convection. Improvements in the design of future submarine hydrogeological studies are proposed for thermal data collection and groundwater flow analysis, including new equations that quantify the minimum detectable flux magnitude for a given sensor accuracy and profile length.

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1DTempPro V2: New Features for Inferring Groundwater/Surface‐Water Exchange

Cited by 55 publications

References 15 publications

Estimation of vertical water fluxes from temperature time series by the inverse numerical computer program FLUX‐BOT

Estimation of vertical water fluxes from temperature time series by the inverse numerical computer program FLUX‐BOT

Heat: An Overlooked Tool in the Practicing Hydrogeologist's Toolbox

Rethinking the Use of Seabed Sediment Temperature Profiles to Trace Submarine Groundwater Flow

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