Groundwater level data for Watershed-9 (W-9) in the Sleepers River Research Watershed (Vermont)

Depth to groundwater has been monitored since 1991 in Watershed 9 (W-9) of the Sleepers River Research Watershed (SRRW) in Vermont, with measurements made at many different locations. This data publication includes monthly water levels that are manually measured (1991-2018), daily and breakpoint water levels (1993-2009), and 30-minute water level data (2002-2004). There is a network of 39 wells, 3 recording wells, and 6 piezometers wells throughout W-9. Monthly (sometimes more frequent) water table elevation data have been measured in 48 different wells or piezometers since 1991. Daily data are reported for three positions (toeslope, mid hillslope, and upper hillslope) along a transect in the W-9B catchment (a sub-basin of W-9) since 1992. The 30-minute data are reported for 18 various wells in the W-9 catchment, but only for a relative short duration from 2002 to 2004 when measured during a particular study.The Sleepers River Research Watershed (SRRW) was established during the 1960s to study the hydrology of mixed-use, mountainous landscapes in Vermont. The SRRW contained up to 17 research watersheds and 31 meteorological stations, though those numbers have fluctuated over time as different Federal Agencies or academic institutions operated the site and research program. From 1992 to 2011, the SRRW has been part of the Water, Energy, and Biogeochemical Budgets (WEBB) Program of the U.S. Geological Survey (USGS), Department of Interior (Glynn et al. 2009). Since 2011, the site has been part of the Land Change Science Program of the USGS. Groundwater elevation has been monitored since 1991 in the 40.5 hectare (ha) W-9 catchment as part of the long-term research and monitoring program. Water level was measured in each well or piezometer on a monthly or more frequent basis since 1991. In a sub-basin (W-9B) of the W-9 catchment, a transect of recording wells was established at three different hillslope positions (toeslope, mid hillslope, and upper hillslope; 1992 to present) for long-term monitoring. For particular studies that may have lasted for up to three years, water table levels were measured at various wells throughout the W-9 catchment.Additional information about the Sleepers River Research Watershed and the W-9 catchment, in particular, can be found in many publications, with the following being particularly relevant to the research program description, data, and metadata: Glynn et al. (2009), Shanley et al. (2015), Shanley et al. (2003), and Shanley et al. (1995). These data were published on 02/19/2019. Minor metadata updates were made on 05/02/2022.