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USGS/Washington Water Science Center

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A vented conductivity, temperature and depth sensor (CTD, InSitu Aqua Troll) was installed at site NR1 (N 47° 04’ 16.1”/W 122° 42’ 15.5”) and continuously measured water temperature, water depth, specific conductance, and salinity at 15-minute intervals from February 11, 2016 to July 18, 2016 (159 days). The sensor was replaced with a vented water-level logger (InSitu Level Troll) on July 19, 2016 and deployed until March 19, 2018 (608 days). The site is tidally influenced and located approximately 4.1 km upstream from the mouth of the Nisqually River and within the tidal prism. The elevation (NAVD88) of the top of the deployment pipe was surveyed by RTN-GPS. Tape-down measurements from the top of the pipe to the...
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A vented conductivity, temperature and depth sensor (CTD, InSitu Aqua Troll) was installed at site NR3 (N 47° 05’ 12”/W 122° 42’ 22”) and continuously measured water level, water temperature, specific conductance, and salinity at 15-minute intervals from February 12, 2016 to August 7, 2016 (177 days) and from October 7, 2016 to February 8, 2017 (124 days). This site is tidally influenced and located approximately 2.2 km upstream from the mouth of the Nisqually River. Elevation (NAVD88) of the deployment pipe was surveyed by RTN-GPS. Elevation of pipe plus distance to sensor is included in the offset. The offset needed to convert water depth to NAVD88 water surface elevation is -0.31 meters. . Water depth of the...
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An upward-looking acoustic Doppler velocity meter (ADVM; Sontek XR, 1.5 MHz) was deployed in McAllister Creek at site MC2 (N 47° 05’ 43”/W 122° 43’ 38”) and continuously recorded water velocity, temperature and water level at 5-minute intervals from September 26, 2016 to October 14, 2016 (18 days), and at 15-minute intervals from December 2, 2016 to May 25, 2017 (174 days) except for the period of March 6 – 11, 2017 when the sensor was removed for maintenance and battery replacement. The site is tidally influenced and located approximately 0.7 km upstream from the mouth of McAllister Creek. The measurement averaging interval for the ADVM was 60 s. The blanking distance was set at 0.5 m and the cell end was set at...
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An upward-looking acoustic Doppler velocity meter (ADVM, SonTek SW, 3.0 MHz) located in a tidal channel of the Nisqually River Delta at site D2 (N 47d 05’ 37.2”/W 122d 42’ 56.4”) measured water level and current velocity at 15-minute intervals from February 16 to July 20, 2017 (104 of 154 days, accounting for missing periods). This site is in a tidal channel at a levee breach where flow is tidally influenced. The water depth of the sensor ranged from 0.04 to 4.63 m and may have been lower during periods of extreme low tide. The elevation (NAVD88) of the ADVM sensor was surveyed by RTN-GPS. The offset to convert all water depth time-series data to water surface elevation (NAVD88) is 0.06 meters. Instrument temperature...
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A vented water-level logger was installed at site MC1 (N 47° 05’ 12.2”/W 122° 43’ 36.8”) and continuously measured water depth and temperature at 15-minute intervals from Nov 22, 2016 to Sept 6, 2017 (288 days). This site is tidally influenced and located 1.12 km from the mouth of McAllister Creek. Elevation (NAVD88) of the water surface above the sensor was surveyed by RTN-GPS. The offset to convert all water depth time-series data to water surface elevation (NAVD88) is -1.052 m. Water depth ranged from 0.69 to 4.88 m. Temperature ranged from 2.8 to 22.5 degrees C.
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