Water Level and Temperature Data of the Greater Charleston Region (Ashley, Cooper, and Wando Rivers), Field Collected 2021 May-November

Water levels and temperatures were collected in the greater Charleston Harbor Region during a six-month field campaign in 2021 (Figure 1). Nine HOBO sensors were deployed at Fort Moultrie (site: H0), Elliot Cut (site: EC), and further inland along the upper Wando River (sites: W32, W38, W43, W49), the Ashley River (site: A58), and the Cooper River (site: C73 x2). Sensors recorded pressure and temperature at 15-minute intervals. They were fixed near the bed at elevations within 20cm of the lowest recorded water levels (except for H0, the sensor was approximately 2m above the bed). One HOBO sensor collected atmospheric pressure at site C73 to correct for barometric effects. Water levels were surveyed at each site with a RTK GPS to convert local observations to a common vertical datum, NAVD88. Data post-processing was completed in MatlabTM following the HOBO manufacture documentation: Using a Reference Water Level and Using a Barometric Datafile (Onset Computer Corporation, 2008). Our quality control revealed that very low water levels exposed the sensor at W43 to the air for <3 hours. These data points were replaced using a spline interpolation. This effort supports the research of Dykstra et al. (in-prep).