Snow tracer - Observation and model simulations for laboratory and field experiments

Metadata

Other contributing persons, institutions or organisations	dfg - Funder
Other contributing persons, institutions or organisations	Liedl, Rudolf - TUD - ProjectLeader
Other contributing persons, institutions or organisations	Diana, Burghardt - TU Dresden - WorkPackageLeader
Other contributing persons, institutions or organisations	Tritschler, Felix - TU Dresden, UFZ Leipzig - ProjectMember
Other contributing persons, institutions or organisations	Händel, Falk - TU Dresden, UFZ Leipzig - RelatedPerson
Other contributing persons, institutions or organisations	Dietrich, Peter - UFZ Leipzig - WorkPackageLeader
Person(s) who is (are) responsible for the content of the research data	Binder, Martin
Abstract	The dataset includes several observation and model data used for figures 3 to 6 in the manuscript 'Application of snowmelt as an active dual isotope groundwater tracer' sent to Journal 'Water Resources Research'. This includes 1.) observation data from two 1D laboratory column displacement tests and model simulations using CXT-Fit as well as 2.) observation data from a push-pull tracer experiment in Pirna, Saxony, Germany and model simulations using MT3D-MS
Table of contents	data for Figure 3a, 3b, 4a and 4b is stored in 'laboratory_test_1D_columns.xlsx'; data for Figure 5 and 6 is stored in 'field_scale_test_push_pull.xlsx'; the figures itself are not included
Counties, the data is referencing	GERMANY	de
Coordinates of places, the data is referencing	Pirna
Additional keywords	tracer test
Additional keywords	snowmelt
Additional keywords	deuterium
Additional keywords	oxygen-18
Additional keywords	groundwater
Language	eng
Year or period of data production	2017-2018
Publication year	2018
Publisher	Technische Universität Dresden
Publisher	Helmholtz Centre for Environmental Research, UFZ Leipzig
Content of the research data	Dataset, Model: laboratory column experiment, tracer experiment at field site Pirna, Pratzschwitzer Str. 15, Germany
Other specification of usage rights
Holder of usage rights	Technische Universität Dresden
Usage rights of the data	CC-BY-NC-SA-4.0
Additional precise description of discipline	Groundwater Management
Discipline(s)	Environmental Science and Ecology	de
Title of the dataset	wrr_snowtracer_datasets_for_figures_3_to_6

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Name:: field_scale_test_push_pull.xlsx
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Name:: laboratory_test_1D_columns.xlsx
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Application of snowmelt as an active and inexpensive dual isotope groundwater tracer [1]
Stable isotope analysis is widely used in environmental tracer studies, e.g. for groundwater flow and discharge quantification. In this context, this study presents an inexpensive approach for the combined use of deuterium (2H) and oxygen-18 (18O) as active semiartificial groundwater tracers by a direct injection of snowmelt into aquifers. This dual isotope approach takes advantage of isotope signature differences between typical groundwater and precipitation water. Aim of this study is the experimental demonstration on laboratory- and field-scale. For this, two column flow experiments were performed using δ2H and δ18O values of snowmelt for breakthrough detection. The differences of the isotope signature between the snowmelt and groundwater were ∆(δ2H) ≈ 61.0 ‰ and ∆(δ18O) ≈ 8.2 ‰. Breakthrough was observed to be almost congruent to a sodium chloride tracer, indicating conservative transport. The low electrical conductivity (EC) of snowmelt (45 µS/cm, i.e. ∆EC ≈ 486 µS/cm to groundwater) was used as an additional easy-to-measure breakthrough indicator. However, the snowmelt EC breakthrough suffered from a slight retardation due to ion exchange. Based on these results, a push-drift-pull tracer test with snowmelt, additionally labeled with uranine, was realized at the field site Pirna, Germany. In the pull phase, a significant isotopic depletion was observed with peak differences of ∆Peak(δ2H) ≈ 24.2 ‰ and ∆Peak(δ18O) ≈ 3.2 ‰, which equals approx. 40 % of the initial difference. The isotope breakthrough was observed to be almost the same as the breakthrough of uranine indicating conservative behavior, while EC breakthrough was affected by ion exchange again.

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