4/30/13, Boise State University, Dept of Geosciences, Hydrologic Sciences, Jim McNamara Research Director (1999-present), Pam Aishlin site maintenance and data management. Data provided herein is for the Treeline (TL) stream measurement site of Dry Creek Experimental Watershed, Boise, Idaho. DATA STREAM: 1. A weir was installed at the Treeline catchment outlet by Boise State University, late 2007. The weir is rectangular with a v notch outlet. Three ft wide, 6 ft long, 2 ft deep. Instruments installed vary year to year and may include a conductivity-temperature sensor, water level pressure transducer and/or additional instruments for measuring water level in the weir. Stream flow has been monitored at this catchment prior to 2007 using a variety of methods, including dilution gaging, for which data is available by request. Data collection and site maintenance is provided by Boise State University Hydrologic Sciences. 2. Data files are provided by Campbell Scientific dataloggers and/or self logging instruments, and retrieved either via site visit or telemetry. Files are archived at Boise State University, Hydrologic Sciences, Dept of Geosciences. These raw data files occur at varied data collection intervals, e.g. 10 minute, 30 minute or hourly. ***NOTE: Raw data files are level 0, raw data (CUAHSI HIS standards). (CUAHSI HIS standards, 0 = raw data, 1 = Quality controlled data that have passed quality assurance procedures such as routine estimation of timing and sensor calibration or visual inspection and removal of obvious errors, 2 = Derived products that require scientific and technical interpretation and may include multiple-sensor data. An example is basin average precipitation derived from rain gages using an interpolation procedure.) 3. Select data files are quality checked and post processed for gapfilling, noise filtering and/or corrected according to established instrument calibrations. For stage data, random noise and negative values occuring over short time intervals are replaced with proximate average stage values. During the winter months ice may affect data accuracy, for obvious ice-induced noise (> 5cfs change per time increment occurring in conjunction with freezing temperatures), values are replaced with time range before/after average values. For electrical conductivity, in some instances, negative values are reported when stream is dry, wires are disconnected or other failure occurs. These noise values are replaced with -6999, no data values. Stage-discharge rating curves are applied to continuous stream stage data for output of continuous discharge time series. Where feasible, gaps occuring in the discharge timeseries due to sensor failure/error may be filled via interpolation/regression from same site supplementary instruments or other sites within the same watershed. Raw data timestamps may vary from final output timestamps, in which case raw data will be interpolated for output on the hour. 4. Data as collected and provided is, by protocol, in mountain standard time, year-round. SITE NOTES: Data provided herein is for the Treeline catchment of Dry Creek Experimental Watershed, Boise, Idaho. Streamflow at this small 0.02 km2,catchment is intermittent. Typically, water flow begins in late December or early January and flows intermittently, especially under freezing conditions during January. Stream flow typically ceases by late June. DATA/INSTRUMENT NOTES: Capacitance logger - Capacitance loggers used prior to 2007 were Trutrack (manufactured in New Zealand) water level sensors that also provided water temperature and air temperature. Capacitance loggers used since 2007 at our stream sites have been purchased from Odyssey, also based in New Zealand. These sensors provide waterlevel data only, precision 0.001 ft. Solinst - Post 2007, secondary stream sensors installed are solinst water level sensors paired with solinst barometric measurement sensors. These sensors are self-logging instruments acquired from the Canada-based Solinst company. Both sensors provide stream or air temperature and pressure data. The Solinst Levellogger Gold Model 3001 0-15 ft and the Solinst Barologger Gold Model 3001 are utilized at our sites. Level logger +/- .01 ft accuracy-typical, .001% FS resolution; barologger +/- .003 ft accuracy-typical, .002% FS resolution. Barologgers applied to solinst total pressure data are installed at this site or at upstream and/or downstream site locations. Pressure transducer - Pressures transducers employed at our stream sites 1999-2013 include Global and Druck water level sensors. These sensors include atmospheric pressure compensation via vent tubing encased within the sensor cable to which a vented dessicant capsule is attached at cable end (within the datalogger box). The sensors are wired and programmed using Campbell Scientific dataloggers, CR10x prior to 2013. LG 2013, CR10x. Sensor precision is 0.01 to 0.001 ft. Models employed at our sites are selected for expected maximum water depth <10 ft. A lower precision, higher range Druck pressure tranducer was temporarily employed at LG late 2003 till mid 2006. Druck models employed include PDCR 940, 1230 and 1830 series. Global models used include WL300 and GL300. 2012 Stevens SDX freeze resistent pressure transducer is installed however, performance has not been reliable in field installations though OK in lab tests 2012-2018. Conductivity-Temperature sensor - Campbell Scientific conductivity sensors employed at our sites include CS547A probes which require the Campbell A547 datalogger interface device. Older 247 models were employed prior to 2004. ANNUAL ERRORS/GAPS/UPDATES: NOTE - SENSORS ARE COMMONLY REMOVED FROM THIS TL SITE DURING THE SUMMER-FALL MONTHS. 1999 - 2006 Streamflow measurement conducted at temporary upper, middle and lower weirs in the Treeline Catchment. Data available by request. 2007 Capacitance rod emplaced at the temporary lower weir to provide stage data on February 17, 2007. Streamflow assumed zero in January under observed frozen conditions. V notch weir installed at the Treeline catchment outlet late 2007. Rating curve applied to calculate discharge, based on staff gage referenced water level and physical discharge measurement at the lower weir(s). Water level stage recorded at 37 minutes after the hour, linearly interpolated to values on the hour. Middle Weir data available by request. 2008 V notch weir installed at the Treeline catchment outlet late 2007. Streamflow measurement at the weir initiated January 18, 2008. Solinst and Capacitance water level loggers installed. Data provided herein for streamflow is based on the solinst water level data. Rating curve applied to calculate discharge. Solinst Water level stage and temperature recorded at 40 minutes after the hour, linearly interpolated to values on the hour. Dates of download and possible solinst offset: 2008: 2/13, 2/21, 3/12 3/27,4/14, 5/5; On 3/19 and 4/13 peaks appear to be valid. 4/13 peak verified onsite. Data gap from 5/5/08. No flow on 6/4/08, sensors removed. Druck Pressure Transducer and Campbell Scientific electrical conductivity-temperature sensor installed in weir, data, however, is assessed as invalid due to freezing. 12/29/2008 weir filling occurred in conjuction with rainfall, warm temperatures and melting snow. 2009 Druck Pressure Transducer and Campbell Scientific electrical conductivity - temperature sensor are installed in weir. Data is recorded on the hour. A site based rating curve is applied to calculate discharge from pressure transducer water level data. Streamflow is recorded from Jan 2009 till sensors were removed for maintenance in Jy 2009. Additional data is available upon request for a June weir-filling streamflow event, June 2nd-6th, 2009. Weir filling discharge is calculated for water year 2010, occurring 11/19/2009 through 1/12/2010 at an average rate of 0.000056 L/m- This data is available upon request. 2010 Druck Pressure Transducer and Campbell Scientific electrical conductivity - temperature sensor installed in weir. Data is recorded every 30 minutes till 6/30/10. Data from 12/16/10 is 15 min. Vnotch equation applied to calculate discharge from pressure transducer water level data. For prior years, vnotch equations were not utilized due to poor match with physical discharge measurements from the weir. Comparison of 2009 discharge calculated via rating curve vs. presently employed vnotch equation indicate approx 18% lower discharge calculation via rating curve as assessed for 2009. Weir filling discharge is calculated for water year 2010, occurring 11/19/2009 through 1/12/2010 at an average rate of 0.000056 L/m. On 1/12/2010 weir began to fill rapidly from 0.16 ft stage to 0.59 ft stage. The max fill rate during this period on1/12/10 was 1.585 L/m, .0009 cfs, avg rate 0.72 L/m, compared to discharge at 4.185 L/m once flowing. Data gap 5/7 to 5/18 and 6/1/10-6/5/10. Data resumes on 12/16/10, at which time flow has already occurred; Weir filling occurred early to mid December 2010, as noted with site visits, discharge for weir fill not calculated. 2011 Druck Pressure Transducer and Campbell Scientific electrical conductivity- temperature sensor installed in weir. Data is recorded every 15 minutes. Vnotch equation applied to calculate discharge from pressure transducer water level data. Early 2011 data avail from 1/1/11 to 6/30/11. Streamflow is minor as 2011 begins. 01/17/11 2 pm to 5 pm RAIN ON SNOW EVENT. Sensor redeployed 10/18/2011 1000. Press Tran is damaged by freezing 12/5/11. EC data is suspect as well due to potential freeze damage to sensor. Capacitance logger is used to provide stage-discharge data. No discharge occurred fall 2011. T and ec are measured in non-flowing water 10/18/11 to end of 2011. 2012 winter-spring 2011-2012 water level data is provided by Odyssey capacitance water level logger. Conductivity sensor was damaged by freezing, intermittently. However, stream temperature data is available. Stream stage data is not available till Jan 22, 2012, at time of Odyssey capacitance sensorinstallation. However, site visits confirmed zero discharge prior to 1/22/12, under frozen conditions. Weir-filling discharge after 1/22/12 was not calculated due to frozen conditions grossly affecting stage data. Odyssey sensor minor gap occurs 2/9/2012 1130 - 1240, filled by interpolation. additional minor gaps in odyssey output for discharge have been filled. Temperature data is avail 1/17/12 to 4/26/12, gapfilled to 1/17/12, filled with -6999, and 4/16/12 10-1200 and 4/25/12 3-1130; end of spring record as of 4/26/12 0600. NO streamflow occurred at the end of 2012. Water level logger data is provided at 10 minute intervals. Cond-T sensor provided at 30 minute data. 2012 - 2013 New Stevens freeze resistant pressure transducer was installed fall 2012, as well as a new conductivity-temperature sensor. Odyssey capacitance water level logger remains in place as a second water level sensor at the weir installation. New sensors performance is deemed unreliable for 2013, thus, stream discharge provided is based on capacitance logger water level data, assessed as reliable. Cap logger data gap 021513-022013 due to download failure. Conductivity and temperature data output is sporadic, yet presented herein, with numerous -6999 values due to sensor-logger error and/or solid ice encasement of the sensors. 2013 - 2014 Stream discharge provided is based on capacitance logger water level data, assessed as reliable. Conductivity and temperature data output is sporadic, yet presented herein, with numerous -6999 values due to sensor-logger error and/or solid ice encasement of the sensors. 2015 spring - PT failed. Gaps occur in T, ec. used cap rod for stage-discharge. fall - PT with ec-T installed 12/11, incurred failure late Dec. Temp, ec gap 12/20-12/27. Flow initiated 12/7. Cap logger data is used for stage-discharge Dec 2015. Early Dec comparison between PT and caprod data indicates that caprod may produce lower discharge values (peak flow 0.28 L/s vs. 0.39 L/s). 2016 Flow continued minimally through Jan, Peak in Feb, end in April. Capacitance logger remains as the reliable sensor for stage, discharge. The weir equation continues to be used to calculate discharge from stage values. Stream Temperature and electrical conductivity are provided via the Campbell logger Jan - April. The pressure transducer for stage, however, did not engage until early March. PT values were noisy compared to cap logger values. This Stevens PT has thus remained problematic. 2017 Sensors installed post-freeze, 2/16/2017, stream not yet flowing. 2/24/2017 stream observed flowing. 5/12 and 5/18/2017 observed barely flowing. 6/2/17 observed no flow. No flow observed for the remainder of the year. 2018 Sensors not installed Jan- Feb due to frozen conditions in weir. Pressure transducer, even through rated freeze tolerant, can be damaged by freezing. 2/27/2018 frozen water level indicates that some flow may have occurred within the Jan-Feb period. Sensors installed 3/12/2018, water flowing at time of installation. No data values are provided for Jan 1, 2018 to date of installation as flow conditions are not verified during this time. Conductivity and Temperature are provided via Campbell Sci logger. Stevens PT provides water level, but is determined suspect per drift. Odyssey Capacitance Logger is used to provide streamflow data. Weir equation applied. Weir filling mid through late December indicates initial streamflow, zero discharge from weir. 2019 Weir filling continues into January, with rapid weir fill Jan 8th till flow indicated by data on Jan 11th. Caplogger swapped for new on Jan 24th. Errors occur w/ campbell sensors installed, data valid from 3/25/2019 until early June at water depletion in weir. 2020 Echo sonic water level sensor and conductivity probes via campbell logger emplaced Feb 25/2020. Echo sensor performed well. Cap water level used herein due to longer record, installed 2/17/20. 2021 As of 2/13/21 no verfied streamflow. Capacitance water level in use. Errors occurring in Campbell sensors.