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Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Types Map Service (3) OGC WFS Layer (3) OGC WMS Layer (3) OGC WMS Service (3) Contacts U.S. Geological Survey - ScienceBase Jennifer L. Rapp U.S. Geological Survey U.S. Geological Survey - ScienceBase USGS Virginia and West Virginia Water Science Center Categories Data (2) Tag Types Place (3) Theme (3) Tag Schemes none (3) View Results as: JSON ATOM CSV

Ecological Flow Statistics at USGS Streamgages within the Chesapeake Bay Watershed (1940-2018) Ecological flow (EFlow) statistics have been designated to characterize the magnitude, frequency, and duration of extreme high- and low-flows, the timing of seasonal flows, and the consistency of the historic regime. This Child Item contains a table of 178 EFlows for the time periods 1940-1969, 1970-1999, and 2000-2018, with absolute and percent change between periods, where applicable. Statistics were computed by Water Year (WY) for all 178 metrics and absolute and percent change were calculated by comparing metrics between combinations of two of the three time periods (1940-1969 and 1970-1999; 1940-1969 and 2000-2018; 1970-1999 and 2000-2018). Streamgages from the original dataset (n = 409) were excluded from... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Chesapeake Bay Watershed, Delaware, EFlow, EFlow statistics, EGRET, All tags... Maryland, New York, Pennsylvania, United States, Virginia, Washington DC, West Virginia, ecological flows, streamflow, trends, Fewer tags Streamflow Statistic Trends at USGS Streamgages within the Chesapeake Bay Watershed (1940-2018) This Child Item contains (1) a table of trends in eight annual streamflow statistics for the time periods 1940-1969, 1970-1999, and 2000-2018, and (2) a .zip file of plots of the eight statistical trends for the three time periods. The annual streamflow statistics and their trends were computed by Climate Year (CY) for 1-,7- and 30-day minima and by Water Year (WY) for 1-,7- and 30-day maxima, median and mean. Streamgages from the original dataset (n = 409) were excluded from one or more time periods of analysis because of extensive data gaps that would interrupt trend lines; therefore, streamgages were indexed into the earliest possible time period relative to their installation date (for example, a streamgage... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Chesapeake Bay Watershed, Delaware, EGRET, Maryland, New York, All tags... Pennsylvania, United States, Virginia, Washington DC, West Virginia, flow, stream flow trends, time series, Fewer tags USGS Streamgages active within the Chesapeake Bay Watershed through Water Year 2018 This Child Item contains a shapefile (ArcGIS Pro version 2.5.0) of the original 409 USGS streamgage locations active within the Chesapeake Bay Watershed (CBWS) through September 30, 2018. Streamflow trends and EFlow statistics tables from this data release may be joined to the shapefile by either the "Streamgage_ID" or "Streamgage_Name" attributes to aid in spatial analysis within a GIS. Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: ArcPro, Chesapeake Bay Watershed, Delaware, EFlows, ESRI, All tags... GIS, Maryland, New York, Pennsylvania, United States, Virginia, Washington DC, West Virginia, rivers, streamflow, trends, Fewer tags