This dataset contains annual metrics quantifying low streamflows, climate, topography, land cover and geology for 325 USGS GAGES-2 watersheds within the Delaware River Basin boundary or with watershed centroids within a 25-mile buffer of the Delaware River Basin boundary.

This dataset contains mean-annual metrics quantifying intermittent streamflow, climate, topography, land cover and geology for 540 USGS GAGES-2 watersheds experiencing non-perennial flow.

This dataset contains mean-annual metrics quantifying intermittent streamflow, climate, topography, land cover and geology for 540 USGS GAGES-2 watersheds experiencing non-perennial flow.

This dataset contains four tables: (1) site, regression and weighted peak flow estimates (peak_flow_estimates.csv) (2) site, regression and weighted low flow estimates (low_flow_estimates.csv) (3) basin characteristics for peak flow sites (peak_basin_stats.csv) (4) basin characteristics for low flow sites (low_basin_stats.csv). These tables support the USGS report "Magnitude and Frequency of Peak Flows and Low Flows on Nontidal Streams in Delaware."

This dataset contains four tables: (1) site, regression and weighted peak flow estimates (peak_flow_estimates.csv) (2) site, regression and weighted low flow estimates (low_flow_estimates.csv) (3) basin characteristics for peak flow sites (peak_basin_stats.csv) (4) basin characteristics for low flow sites (low_basin_stats.csv). These tables support the USGS report "Magnitude and Frequency of Peak Flows and Low Flows on Nontidal Streams in Delaware."

The U.S. Geological Survey (USGS) collected stream samples at 19 sites in tributaries to the Upper Delaware Scenic and Recreational River during 2012-15 in cooperation with the National Park Service (NPS) through the USGS-NPS Water-Quality Partnership to provide data on existing water-quality in small watersheds not previously characterized and where there was potential for unconventional gas development. USGS discrete data consist of water-quality and discharge values for stream samples collected monthly from November 2012 to June 2015 at one site on each of 6 tributaries under a range of hydrologic conditions and twice in 2014 (April and September) at one site on each of 13 other tributaries in New York and Pennsylvania. Two of the 6 sites sampled monthly were also sampled in September 2015. Drainage areas above sampling sites ranged from 2.19 to 67.6 square miles. Water-quality data includes USGS field measurements (water temperature, pH, specific conductance, and dissolved oxygen) and results of USGS laboratory analysis for major ions and selected minor ions and trace elements, including constituents present in high concentrations in brines and unconventional gas well flow-back such as barium, chloride, lithium, and strontium. Other trace elements. including arsenic, cobalt, and molybdenum were analyzed in 4 to 5 samples at each of 6 sites sampled monthly and in both samples at the 13 sites sampled twice in 2014. One sample at each of 6 sites sampled monthly also was analyzed for uranium, radium-226, and gross alpha and beta radioactivity. Other data collected for the study includes selected continuous water-quality (water temperature, pH, specific conductance, and dissolved oxygen) measured using in-situ sondes operated by the NPS for periods of 3 to 8 months during 2013-2015 at the 6 stream sites sampled monthly and one of the 13 stream sites sampled twice in 2014.

This USGS data release contains daily-timestep and monthly-timestep estimates of baseflow at 49 reference stream gages located within 25 miles of the Delaware River basin watershed boundary. Estimates are provided for the available period of record of streamflow data at each site between 1950 and 2015. A two-parameter recursive digital filter was used to estimate baseflow at the selected stream gaging stations using U.S. Geological Survey Groundwater Toolbox (Barlow and others, 2017; Eckhardt, 2005). References cited: Barlow, P.M., Cunningham, W.L., Zhai, T., and Gray, M., 2017, U.S. Geological Survey Groundwater Toolbox version 1.3.1, a graphical and mapping interface for analysis of hydrologic data: U.S. Geological Survey Software Release, 26 May 2017, https://doi.org/10.5066/F7R78C9G. Eckhardt, K., 2005, How to construct recursive digital filters for baseflow separation: Hydrological Processes - An International Journal, v. 19, p. 50-515, https://doi.org/10.1002/hyp.5675.

This USGS data release contains daily-timestep and monthly-timestep estimates of baseflow at 49 reference stream gages located within 25 miles of the Delaware River basin watershed boundary. Estimates are provided for the available period of record of streamflow data at each site between 1950 and 2015. A two-parameter recursive digital filter was used to estimate baseflow at the selected stream gaging stations using U.S. Geological Survey Groundwater Toolbox (Barlow and others, 2017; Eckhardt, 2005). References cited: Barlow, P.M., Cunningham, W.L., Zhai, T., and Gray, M., 2017, U.S. Geological Survey Groundwater Toolbox version 1.3.1, a graphical and mapping interface for analysis of hydrologic data: U.S. Geological Survey Software Release, 26 May 2017, https://doi.org/10.5066/F7R78C9G. Eckhardt, K., 2005, How to construct recursive digital filters for baseflow separation: Hydrological Processes - An International Journal, v. 19, p. 50-515, https://doi.org/10.1002/hyp.5675.

This data set contains U.S. Geological Survey (USGS) streamgage identification numbers, begin and end years of the periods of streamflow record tested, Sen slope trends in the annual minimum 7-day streamflow for the period of record tested, the p-values (significance) of the trends, and the trend Sen slopes standardized by the standard deviations of the residual errors defined as the difference between observations and the Sen slope lines, for 174 USGS streamgages with 56 to 75 years of record in the Chesapeake Bay watershed, Mid-Atlantic U.S.

This data set contains U.S. Geological Survey (USGS) streamgage identification numbers, begin and end years of the periods of streamflow record tested, Sen slope trends in the annual minimum 7-day streamflow for the period of record tested, the p-values (significance) of the trends, and the trend Sen slopes standardized by the standard deviations of the residual errors defined as the difference between observations and the Sen slope lines, for 174 USGS streamgages with 56 to 75 years of record in the Chesapeake Bay watershed, Mid-Atlantic U.S.