BOHNER_HYDRO_DAILY English utf8 dataset McMurdo Dry Valleys LTER Information Manager im@mcmlter.org pointOfContact 2021-04-26 ISO 19115-2 Geographic Information - North American Profile Metadata - Data with Biological Extensions ISO 19115-2:2009(E) Daily summarized seasonal measurements of discharge, water temperature, and specific conductivity from Bohner Stream at B5, McMurdo Dry Valleys, Antarctica (2011-2023, ongoing) 2021-04-26 publication Michael Gooseff University of Colorado Boulder http://www.colorado.edu/ michael.gooseff@colorado.edu http://goosefflab.weebly.com pointOfContact Diane McKnight University of Colorado Boulder http://www.colorado.edu/ diane.mcknight@colorado.edu pointOfContact documentDigital As part of the Long Term Ecological Research (LTER) project in the McMurdo Dry Valleys of Antarctica, a systematic sampling program has been undertaken to monitor the glacial meltwater streams in that region. This package contains daily summaries derived from 15-minute measurements of water quality and quantity parameters measured with automatic recording devices on streams in this region. Specifically, this metadata record describes the daily hydrological summaries for the McMurdo Dry Valleys' Bohner Stream at the B5 streamgage, located in the Bonney Basin of Taylor Valley. Measurements commenced during the 2011-12 austral summer and are ongoing. Gage control was constructed on 27 Jan 2011 at -77.696302 62.558285. This dataset extends through the first half of the 2022-23 field season. Name: Anna T. Wright Role: field technician Name: Renée F. Brown Role: data manager Name: Sam Beane Role: former field crew completed McMurdo Dry Valleys LTER Information Manager im@mcmlter.org pointOfContact unknown No data were collected during the 20-21 austral summer due to the COVID-19 pandemic. disturbance theme LTER Core Areas English Bohner at B5. Near Bohner at lower. Started Jan 2011. Parent Stream: Bohner Stream Provenance : Coordinates from Steve Crisp (email to Inigo San Gil) 162.558142000000 162.558142000000 -77.696332000000 -77.696332000000 ground condition 2011-11-29 2023-01-21 Codes Qe - Flow estimated by averaging adjacent 15-minute intervalsQmf - Flow data Missing â flow present â either observed or suggested by water temperature and specific conductance dataQmnf - Flow data Missing â no flow - either observed or suggested by water temperature and specific conductance dataQmu - Flow data Missing or flow status unknownQno - No Flow all seasonQsed - Sediment build up on orifice line - may lead to recorded stage measurements corresponding to higher than actual discharge valuesWtx - No water temperature probe at stationWTexp - temperature probe may have been exposed to air because of low flowsSCx - No specific conductance probe at station https://mcm.lternet.edu/sites/default/files/data/mcmlter-strm-b5_bohner-daily-20240108.csv BOHNER_HYDRO_DAILY eng; US McMurdo Dry Valleys LTER BOHNER_HYDRO_DAILY Data Source Definition : Bohner Stream at B5 (Daily) Number of Header Lines : 1 Number of Footer Lines : 1 Orientation : Column Quote Character : "Field Delimiter : , false STRMGAGEID Code representing the stream gage DATE_TIME Date on which the measurements were made Date Time Format: MM/DD/YYYY AVG_DISCHARGE Average daily stream discharge, measured in liters per second. STDDEV_DISCHARGE Standard deviation of daily stream discharge MIN_DISCHARGE Minimum daily discharge rate MAX_DISCHARGE Maximum daily discharge rate. N_DISCHARGE Number of discharge observations per day. TDAILY_DISCHARGE Total daily stream discharge. AVG_TEMP Average daily water temperature in celsius. STDDEV_TEMP Standard deviation of daily water temperature. MIN_TEMP Minimum daily water temperature. MAX_TEMP Maximum daily water temperature. N_TEMP Number of daily water temperature observations. AVG_COND Mean daily specific conductivity. STDDEV_COND Standard deviation of daily specific conductivity. MIN_COND MIN_COND MAX_COND Maximum daily specific conductivity. N_COND Number of daily specific conductivity observations. DBF https://mcm.lternet.edu/sites/default/files/data/mcmlter-strm-b5_bohner-daily-20240108.csv dataset Campbell CR10 dataloggers were used to record stream stage, water temperature, and conductivity in a network of stream gages. Stage is monitored with pressure transducers; PSS-1 and PS-2 models form Paroscientific Corporation, and Accubars from Sutron Corporation. The pressure transducers measure the backpressure in orifice lines set into or above controls in the stream channel. In addition, some of the sites monitor water temperature and conductivity with either USGS minimonitor probes, or Campbell temperature/conductivity probes. Ratings are developed for the stage/discharge relationship at each site by measuring streamflow with current meters or portable flumes, according to standard USGS methods. Datum corrections to the stage are determined by periodically surveying the elevation of the orifice line to the control and nearby reference marks. Calibrations for the temperature and conductivity are assessed by measuring these parameters with portable field meters while simultaneously noting the readings from the gage probes. Data is downloaded into Campbell storage modules, and retrieved into pcs. From there, the data is sent to a USGS computer, where time discrepancies are resolved, and the data is loaded into Aquarius, a database system developed in the USGS for maintaining and processing water data. A determination for each site as to when the stream was flowing and when it was not is made. For water temperature and conductivity, bad data is deleted. Variable shifts are determined based on field calibration measurements, and other indicators. The shifts are applied to the remaining good data inside of Aquarius. The data is pulled out of Aquarius, and reformatted for input into ORACLE. Cases of water temperature below reasonable values are set to lower limits. A quality code is assigned to every value. The resulting data is uploaded into the ORACLE and the McMurdo database. For stage/discharge, bad data is deleted. Survey data is reviewed to compute weir elevations and datum corrections. A rating curve is developed graphically, based on available data, and entered into Aquarius. All applicable shifts and datum corrections are entered into Aquarius. All corrections and ratings are run against the good stage data to compute the discharge at each recording interval. The data is pulled out of Aquarius, and reformatted for input into ORACLE. A quality code is assigned to every value. The resulting data is uploaded into ORACLE and the McMurdo database. Metadata Access Constraints: none Metadata Use Constraints: none annually McMurdo Dry Valleys LTER http://mcmlter.org/ pointOfContact