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by Pete Steeves

Rainy River and Lake of the Woods (RRLOW) StreamStats. Rainy-Lake of the Woods Watershed Forum March 13, 2014. by Pete Steeves. U.S. Geological Survey Northboro, MA 508-490-5054 psteeves@usgs.gov. What is StreamStats?.

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by Pete Steeves

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  1. Rainy River and Lake of the Woods (RRLOW) StreamStats Rainy-Lake of the Woods Watershed Forum March 13, 2014 by Pete Steeves U.S. Geological Survey Northboro, MA 508-490-5054 psteeves@usgs.gov

  2. What is StreamStats? • A map-based Web application that provides information that can be used by engineers, managers, planners, and others to make informed decisions on water-related activities • Primary product is regression-based streamflow statistics

  3. Example Regression Equation • Q100 = 5.39DA0.874(E/1000)-1.13P1.18 where • Q100 is the 100-year flood, in feet3/second • DA is Drainage Area, in square miles • E is mean basin elevation, in feet • P is mean annual precipitation, in inches Citation: Berenbrock, Charles, 2002, Estimating the Magnitude of Peak Flows at Selected Recurrence Intervals for Streams in Idaho: U.S. Geological Survey Water-Resources Investigations Report 02–4170, 59 p.

  4. How is StreamStats Information Used? • Engineering Design—Bridges, culverts, flood-plain management • Water and Land Management—Water rights adjudications; water & land-use planning; in-stream flow, fish passage, & habitat studies • Water Quality Regulation—Low flows, perennial vs. intermittent streams (TMDL’s, NPDES Permits) • Design of Sampling Networks—Cover a range of desired flows

  5. State Implementation Process • Usually funded through cooperative agreements with local agencies • Local USGS Water Science Centers • Prepare GIS datasets • Populate database of statistics for USGS gages • Development team sets up internal test site • WSC evaluates accuracy of internal test site • Development team and/or WSC makes any needed changes • Site is made available to public

  6. Fully Implemented Delineation and basin characteristics only Undergoing final testing StreamStats Status March 2014 Undergoing Implementation Not participating • 31 states fully implemented • 1 state partly implemented • 9 states in implementation process • Regional Studies * Connecticut River Basin implemented * Delaware River Basin partly implemented * Rainy River Basin in development Regional study

  7. RRLOW StreamStats Cooperators • USGS • Project Lead and GIS: Pete Steeves (MA WSC) • Regression Analysis: Erich Kessler (MN WSC) • International Joint Commission (IJC) • RRLOW River Board • Ontario Ministry of Natural Resources (OMNR) • Environment Canada • Regional Stewards of framework datasets (‘harmonized’ watersheds and hydrography)

  8. Framework Datasets • Drainage Areas • Coding • Edgematching • Standardizing • Sub-dividing • Hydrography (NHD/NHN) • Includes lakes, ponds, rivers, reservoirs, dams • Edgematching • Networking (connectivity for tracing) • Attribute crosswalk

  9. GIS Data Preparation • Data preparation and watershed characteristics measurements done using the ESRI ArcHydro Data Model and USGS Tools • Data for boundary delineation • DEM – National Elevation Dataset (NED) • Stream network – National Hydrography Dataset (NHD) • Basin boundaries – Watershed Boundary Dataset (WBD) • DEM forced to conform with stream network and basin boundary datasets • Standard data processing is done by 8-digit WBD (HUC)

  10. Rainy River and Lake of the Woods

  11. International Souris River Basin

  12. StreamStats Components • USGS Station Statistics site • National site that provides information for data-collection stations only • State Applications • Separate application for each state • All raster (watershed) and vector (network) analysis performed here • Functionality varies • ArcGIS Server 9.2 based (soon to be 10.1 platform)

  13. National Site Capabilities Provides ability to locate any USGS streamflow data-collection station in the Nation and get: • Descriptive information about the station • Previously published basin (physical and/or climatic) characteristics • Previously published streamflow statistics • Displays digital topographic maps and aerial imagery as base map

  14. State-Application Capabilities • For data-collection stations, same as national site • For user-selected ungaged sites: • Delineates drainage basin (watershed) boundaries • Editing of basin boundaries, if necessary • Computes basin characteristics • Provides estimates of streamflow statistics based on regression equations • Download of basin boundary shapefiles • Printing of maps shown in user interface • Much more (i.e. network navigation tools)

  15. StreamStats Home Pagehttp://streamstats.usgs.gov

  16. State Applications

  17. Massachusetts Introductory Page Special notices about application Lists statistics estimated by regression equations Gives report citations Describes limits of applicability Link to application Other issues, cooperative statement

  18. User Interface with NHD Gages and Dams

  19. Note: Scale must be at least 1:24,000 Click on Point Delineation button Select Ungaged Site

  20. Delineated Basin

  21. Click on Estimate Flows Using Regression Equations Flow Statistics from Regression Equations Regression equation estimates assume natural flow conditions at the selected site

  22. RRLOW Status: GIS • Watershed delineations can be performed from any point on any stream location in the study area • A number of basin characteristics can be readily summarized including mean-annual precipitation, temperature and runoff; drainage area, channel slope, land cover, wetlands, and storage • These characteristics have been computed for all gage drainage areas of interest (computing regressions relies on fixed site summaries)

  23. RRLOW Status: Flow Statistics • Of the 60 Canadian flow stations with computed values of discharge, 15 can possibly be used for a regional analysis since they are not regulated, and contain the required 10 years of flow record. • 6 of these sites were analyzed in the Ministry of Natural Resources of Ontario Report "Flood Flow Statistics" January 2013. • The remaining 9 sites had data that would be considered inadequate to perform the standard Bulletin 17B analysis as per USGS Standards; mainly that the flow record was only complete for the spring-summer months. After an analysis of the gages on the MN side of the boarder, it was determined that this wouldn't be a problem since more than 95% of the peak flows occurring in MN fell within the period of record that the Canadian gages would have recorded. 

  24. Regional Skew Red = negative skew Green = positive skew (Mean and Standard Deviation have also been computed)

  25. Red = negative skew Green = positive skew

  26. Contact Information • URL • http://streamstats.usgs.gov • Team email • GS-W StreamStats@usgs.gov • This presentation • Provided upon request • User Manual • http://streamstats.usgs.gov

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