Water Data for Nisqually River Delta at Site D2

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 ranged from 4.6 [...]