English utf8 dataset McMurdo Dry Valleys LTER http://mcmlter.org/ 2016-01-08 ISO 19115-2 Geographic Information - North American Profile Metadata - Data with Biological Extensions ISO 19115-2:2009(E) Streamflow and hyporheic thermal regimes influence on hyporheic storage and exchange at Von Guerard Stream, 2006 2016-01-08 publication Karen Cozzetto University of Colorado Boulder http://www.colorado.edu/ kcozzetto@colorado.edu pointOfContact documentDigital We describe the modeling data created and used to study the influence of stream and hyporheic thermal regimes on hyporheic storage and exchange, as well as the field data used in the study. Models and methodologies are also described, along with the physical details of the data. In streams, such as those in the McMurdo Dry Valleys, that experience large daily fluctuations in temperature, associated changes in water density and dynamic viscosity could affect hyporheic characteristics.  Figure: Longitudinal view of stream and hyporheic temperatures at each of the 11 temperature proble locations at two different times. One time, 8:30, was in the middle of the cool morning experiment, the second time, 15:00 was in the middle of the warm afternoon experiment.  Open circles represent stream temperatures.  Filled diamonds, squares, and triangles represent temperatures at 5, 10, and 20 cm depths below the streambed surface, respectively The purpose of this study was to quantify the combined effects of stream and hyporheic temperature regimes and thermal gradients on hyporheic exchange coefficients and storage zone cross-sectional areas.   Name: Inigo San Gil Role: data manager completed McMurdo Dry Valleys LTER http://mcmlter.org/ English Von Guerard Stream at F21. Id: uvg_f21.This was an ill-fated upstream gage on Von Guerard, 2.5 kilometers upstream from F6.  It was installed during the lowest season of record (00-01) and then promptly destroyed during the 01-02 season.  It's parts were stripped and it never generated a hydrology database, but was certainly sampled. 163.301254272461 163.301254272461 -77.626380920410 -77.626380920410 2006-01-16 https://mcm.lternet.edu/sites/default/files/data/Cl_Stream_FieldData.zip Cl Stream Field Data eng; US McMurdo Dry Valleys LTER Cl Stream Field Data Data Source Definition : This archive contain spreadsheets with the tracer of Chloride injected on the stream at several points in the stream.  The concentration units is parts per million. The date and time is provided as well as the relative distance in meters in the stream Number of Header Lines : 1 Orientation : Column Field Delimiter : , false DBF https://mcm.lternet.edu/sites/default/files/data/Cl_Stream_FieldData.zip https://mcm.lternet.edu/sites/default/files/data/Cl_Wells_FieldData.zip Cl Wells Field Data eng; US McMurdo Dry Valleys LTER Cl Wells Field Data Data Source Definition : Zip container for the Cl Wells Field Data Orientation : Column Field Delimiter : , false DBF https://mcm.lternet.edu/sites/default/files/data/Cl_Wells_FieldData.zip https://mcm.lternet.edu/sites/default/files/data/Br_Stream_FieldData.zip Br Stream Field Data eng; US McMurdo Dry Valleys LTER Br Stream Field Data Data Source Definition : This archive contain spreadsheets with the measured concentration of the tracer of Bromide injected on the stream at several wells.  The concentration units is parts per million. The date and time is provided as well as the depth and characteristics of the well. Number of Header Lines : 0 Orientation : Column Field Delimiter : , false DBF https://mcm.lternet.edu/sites/default/files/data/Br_Stream_FieldData.zip https://mcm.lternet.edu/sites/default/files/data/Br_Wells_FieldData.zip Br Wells Field Data eng; US McMurdo Dry Valleys LTER Br Wells Field Data Data Source Definition : This archive contain spreadsheets with the tracer of Bromide injected on the stream, and the concentration measured at several wells.  The concentration units is parts per million. The date and time is provided as well as the depth and characteristics of the well Number of Header Lines : 1 Orientation : Column Field Delimiter : , false DBF https://mcm.lternet.edu/sites/default/files/data/Br_Wells_FieldData.zip https://mcm.lternet.edu/sites/default/files/data/HZTemps_Stream_FieldData.zip Stream temperature field data. eng; US McMurdo Dry Valleys LTER Stream temperature field data. Data Source Definition : An archive of the files containing the tabulated stream water temperatures at the different locations relative to the tracer injection, in celsius. Number of Header Lines : 1 Orientation : Column Field Delimiter : , false DBF https://mcm.lternet.edu/sites/default/files/data/HZTemps_Stream_FieldData.zip https://mcm.lternet.edu/sites/default/files/data/OTIS_input_Exp1.zip OTIS input files experiment 1 eng; US McMurdo Dry Valleys LTER OTIS input files experiment 1 Data Source Definition : The input files for the OTIS modeling streamflow program, with the parameters of experiment 1. Number of Header Lines : 1 Orientation : Column Field Delimiter : , false DBF https://mcm.lternet.edu/sites/default/files/data/OTIS_input_Exp1.zip https://mcm.lternet.edu/sites/default/files/data/OTIS_input_Exp2.zip OTIS input files experiment 2 eng; US McMurdo Dry Valleys LTER OTIS input files experiment 2 Data Source Definition : The archive of the input files used to simulate streamflow with OTIS for experiment 2 Number of Header Lines : 0 Orientation : Column Field Delimiter : , false DBF https://mcm.lternet.edu/sites/default/files/data/OTIS_input_Exp2.zip https://mcm.lternet.edu/sites/default/files/data/OTIS_output_start.zip OTIS output files at start eng; US McMurdo Dry Valleys LTER OTIS output files at start Data Source Definition : The archive of the OTIS simulation output files at start conditions. Number of Header Lines : 0 Orientation : Column Field Delimiter : , false DBF https://mcm.lternet.edu/sites/default/files/data/OTIS_output_start.zip https://mcm.lternet.edu/sites/default/files/data/OTIS_output_end.zip OTIS output files at end eng; US McMurdo Dry Valleys LTER OTIS output files at end Data Source Definition : The archive of OTIS output simulation data files at end conditions Number of Header Lines : 1 Orientation : Column Field Delimiter : , false DBF https://mcm.lternet.edu/sites/default/files/data/OTIS_output_end.zip dataset Field data collection: Two conservative, NaCl tracer injection experiments were conducted in the reach on January 16, 2006.  The first injection took place in the morning between 7:30 and 9:30 when stream and hyporheic temperatures were cooler, and the second took place in the afternoon between 14:00 and 16:00 when stream and hyporheic temperatures were warmer.  The times were selected so that both experiments would occur after the previous day’s peak flow had receded and before the current day’s peak flow had arrived so that flows during the two experiments would be similar.  The reach was instrumented with Campbell Scientific 107-L temperature probes and thermocouples at 11 stations.   At each station, stream temperatures and thalweg streambed temperatures at 5, cm,10 cm, and 20 cm below the surface were measured every minute for the duration of the experiments. Stream and hyporheic water samples were collected at a site 3 m upstream of the injection and at sites located 5, 51, 137, and 142 m downstream of the injection.  The hyporheic water wells were located next to one another in the thalweg  and screened depths of 8 to 12 cm and 23 to 27 cm, and are thus referred to as the shallow/10 cm wells and the deep/25 cm wells, respectively.  Background stream and hyporheic samples were collected once every 15-30 minutes.  Other stream samples were collected every five minutes for the first hour of the injection, every 15 minutes during the second hour of the injection, and every five minutes again during the hour after the injection was stopped.  Well samples were collected every 15 to 30 minutes during the injections and for one hour after the injections stopped.  Samples were filtered through 0.45 μm Pall Gelman filter capsules, collected in HDPE plastic bottles, and kept chilled until analysis.  Field sample analysis: Analysis for chloride was done on a Dionex ion chromatograph by the University of Colorado’s Laboratory for Environmental and Geological Studies.   Model approach: The One-Dimensional Transport with Inflow and Storage model, OTIS-P (Runkel et al., 1998) was used to model chloride data from the tracer experiments.  Four parameters, the transient storage area (As), dispersion (D), the hyporheic exchange coefficient (α), and the main channel cross-sectional area (A) were optimized to simulate chloride concentrations at the 142 m stream site.  Because the reach contained few surficial dead water areas, we assumed that the modeled transient storage represented the hyporheic zone. We used background stream samples at the sites 3 m above and 5 m below the NaCl injection to determine the upstream pre- and post-injection stream chloride concentrations in the model.  Background well concentrations all along the reach were used to determine chloride concentrations in the model’s inflow water.  To estimate upstream flows for the two experiments, we used a mass balance approach that took into account the known injectate concentrations and flow rates.  Because upstream flows were variable, the experiments were modeled under low, medium, and high steady-state flow scenarios with the low and high flow scenarios corresponding to the minimum and maximum of the measured flows, and the medium flow scenario corresponding to the average.  Average inflow rates were estimated based on the chloride tracer dilution and then optimized using the OTIS-P model. Model code used: The One-Dimensional Transport with Inflow and Storage model, OTIS-P (Runkel et al., 1998) was used to model chloride data from the tracer experiments.   Metadata Access Constraints: none Metadata Use Constraints: none annually McMurdo Dry Valleys LTER http://mcmlter.org/ pointOfContact