Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The Washington State Department of Ecology has conducted monthly water quality monitoring at hundreds of freshwater and marine water quality stations throughout the state since 1959. Ecology monitors about 80 stations each year, some on a one-year basis, some on a five-year rotation, and some are monitored continuously. This spatial data set shows the location of these monitoring stations.</SPAN></P></DIV></DIV></DIV>
Copyright Text: Washington State Department of Ecology, Environmental Assessment Program
Color: [0, 112, 255, 255] Background Color: N/A Outline Color: N/A Vertical Alignment: bottom Horizontal Alignment: center Right to Left: false Angle: 0 XOffset: 0 YOffset: 0 Size: 8 Font Family: Arial Font Style: normal Font Weight: normal Font Decoration: none
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>A geodatabase of 387,237 points statistically chosen from the February 2005 version of the Washington DNR Hydrography layer representing stream site locations. For details, see the Design Documentation created by 3/18/2006 by Tony Olsen (U.S. EPA) and Janelle Black (NW Indian Fisheries Commission). The design document is available from the Washington State Department of Ecology at https://fortress.wa.gov/ecy/gispublic/DataDownload/documents/EPA_ENV_MasterSampleDesign.pdf.</SPAN></P></DIV></DIV></DIV>
Copyright Text: Washington State Department of Ecology, United States Environmental Protection Agency (EPA), and Northwest Indian Fisheries Commission
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Automated hydrograph separation techniques were used to evaluate the groundwater contribution to total streamflow (baseflow) at active and inactive stream gauging stations throughout Washington State. Discharge records for 582 gauging stations, with at least three complete water years of daily mean streamflow data, were downloaded from the U.S. Geological Survey (USGS) National Water Information System. Station characteristics were compiled for each gauge, including period of streamflow record, type and degree of regulation affecting the gauge, watershed drainage area, USGS station number, station name, and gauge location. Summary statistics were calculated for annual mean streamflow and annual 7-day low flow for all 582 stations. Monthly, and in some cases annual, statistics for baseflow were then estimated using a USGS hydrograph separation software program called HYSEP (Sloto and Crouse, 1996) for those stations judged to be free of significant snowmelt or regulation effects.</SPAN></P></DIV></DIV></DIV>
Copyright Text: Washington State Department of Ecology, U.S. Geological Survey (USGS)
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>These data represent the point locations of streamflow stations maintained and monitored by the Washington State Department of Ecology. This dataset is maintained </SPAN></P></DIV></DIV></DIV>
Copyright Text: Washington State Department of Ecology, Environmental Assessment Program
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Streams where populations of New Zealand Mudsnails have been confirmed. Created as a featureclass and linear event table based on the current version of the National Hydrography Dataset (NHD).</SPAN></P></DIV></DIV></DIV>
Copyright Text: Jenifer Parsons, Washington Sate Department of Ecology
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Rivers and Lakes in Washington where known populations of New Zealand mudsnails (Potamopyrgus antipodarum) exist upstream or in the immediate watershed. Originally created from Washington Rivers polygon layer in 2010. Addtional polygons imported from NHDArea and NHDWaterbody beginning in 2014.</SPAN></P></DIV></DIV></DIV>
Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Watersheds where populations of the New Zealand mudsnail (Potamopyrgus antipodarum) have been found or are likely to be found due to proximity to known populations. Based on HUC12 WBD Watersheds from USGS.</SPAN></P></DIV></DIV></DIV>