Tidal levels in Nine Marshes on the Virginia Coast, 2018-2019

To determine the tidal range at each marsh, water depth was measured using Onset HOBO Water Level Data Loggers for a period of approximately 30 days. There are two data tables. One contains the water level data, adjusted for air pressure. The second contains the elevations of each well relative to NAVD88. Water depth was measured using Onset HOBO Water Level Data Loggers (Part #U20L-04) for a period of approximately 30 days within each marsh at the boundary of tall-form Spartina alterniflora and short-form S. alterniflora. Three HOBO loggers were available for use in this study; thus, water levels in all nine marshes could not be made at the same time. Water levels were measured in sets of three marshes, simultaneously, by placing one logger in each of three marshes. After about one month, the loggers were removed from a marsh, the data downloaded, and the loggers moved to another set of three marshes. Thus, for the nine sites in this study, three HOBO water-level-logger deployments were made: GATR Tract, Cushman's Landing, and Steelman's Landing from July 6th to August 6th, 2018; Oyster Harbor, Indiantown, and Box Tree from October 8th to November 4th, 2018; and Upper Phillip's Creek, Woodland Farm, and Green's Creek from November 4th to December 4th, 2018.