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National Water-Quality Assessment Program

Welcome to the USGS Webinar: New Science and Online Management Tools to Help Guide Action on Nutrients in Rivers in the Upper Midwest Region of the U.S., Especially in the Great Lakes Basin. Phone Line: 712-432-0900 901183# Thanks for joining the webinar, we will be starting soon.

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National Water-Quality Assessment Program

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  1. Welcome to the USGS Webinar: New Science and Online Management Tools to Help Guide Action on Nutrients in Rivers in the Upper Midwest Region of the U.S., Especially in the Great Lakes Basin Phone Line: 712-432-0900 901183# Thanks for joining the webinar, we will be starting soon. National Water-Quality Assessment Program

  2. USGS Webinar • All phone lines will be centrally muted during the presentation. • Please submit your questions throughout the presentation using the GoToWebinar box. • Following the presentation, we will • unmute the phone lines and go • through the submitted questions.

  3. New Science and Online Management Tools to Help Guide Action on Nutrients in Rivers in Upper Midwest Region of the U.S., Especially in the Great Lakes Basin U.S. Geological Survey National Water Quality Assessment

  4. National Water Quality Assessment Program Surface Water Status and Trends Regions Pacific Northwest Pacific Northwest Missouri River Missouri River Upper Midwest Upper Midwest Northeast Northeast California Southeast Southeast Southwest Lower Midwest Lower Midwest

  5. Use of SPARROW Models to Determine the Spatial Distribution and Sources of Nutrients in Streams in the Upper Midwest By Dale M. Robertson* and David A. Saad U.S. Geological Survey Wisconsin Water Science Center *dzrobert@usgs.gov (608) 821-3867

  6. Approach - SPARROW Water-Quality Model – SPAtially Referenced Regression on Watershed Attributeshttp://water.usgs.gov/nawqa/sparrow Sources Fertilizers Manure Point Sources Atmospheric Dep. Monitoring Data Annual Loads • Mass Balance Model with spatially variable deliveries. Hybrid statistical/ mechanistic process structure. Data-driven, nonlinear estimation of parameters Land Use Y variable • Separates land and in-stream processes • Predictions of mean-annual flux reflect long-term, net effects of nutrient supply and loss processes in watersheds • Once calibrated, the model has physically interpretable coefficients; model supports hypothesis testing and uncertainty estimation Steam/Catchment Network X variables

  7. Sources Upstream Flux as qI qD qI Instream Transport and Decay Land-to-water transport SPARROW Mass Balance modeling approach: - Regress water-quality conditions (monitored load) on upstream sources and factors controlling transport Monitored load Long-term Detrended

  8. Flux from Upstream SPARROW Watersheds Load at a specific site Flux from Within a SPARROW Watershed Land-to-WaterDelivery Sources Transport Transport/Decay Calibration Coefficients Calibration of National model was based on using 425 sites with coinciding loads and GIS information for the Midwest Model ~900 sites; Regression Equation behind the SPARROW Model Mass Balance

  9. Upper Midwest SPARROW Model Calibration One Source: 2002 Farm Fertilizer TP inputs, kg One Land-to-Water Delivery: Soil Permeability Calibration Catchments based on RF1 River Network Long-term detrended Loads for 810 sites

  10. Robertson and Saad, 2011

  11. Total Phosphorus Yields (kg km-2) Total Phosphorus Yields (kg km-2) 0 – 12 0 – 12 13 - 17 13 - 17 18 - 25 18 - 25 25 - 33 25 - 33 34 - 41 34 - 41 42 - 51 42 - 51 52 - 64 52 - 64 65 - 83 65 - 83 84 - 114 84 - 114 115 - 1000 115 - 1000 1001 – 2,980 1001 – 2,980 Distribution in Incremental Phosphorus Yields Distribution in Incremental Phosphorus Yields Superior Superior Huron Huron Ontario Ontario Michigan Michigan Erie Erie Robertson and Saad, 2011

  12. Regional Sparrow Models National Link http://water.usgs.gov/nawqa/sparrow/mrb/ 2. Regional Link http://wi.water.usgs.gov/rna/9km30/index.html

  13. Methods to demonstrate results and help guide decisions Decision Support System Scientists/Managers – Capable of using to visualize SPARROW output and run various scenarios. http://water.usgs.gov/nawqa/sparrow/dss/ Booth et al., 2011

  14. Methods to demonstrate results and help guide decisions 2. SPARROW Mapper – Easy and simple way to get SPARROW results, especially by hydrologic and political boundaries. http://wim.usgs.gov/Sparrow/SparrowMapper.html#

  15. Future SPARROW Modeling in the Upper Midwest 2002 Mississippi/Atchafalaya River Basin 2002 NHD-Plus MRB3 Models Regularly Updated SPARROW Models

  16. How can I get more information? • SPARROW Information: http://water.usgs.gov/nawqa/sparrow/ • New Regional Models: • http://water.usgs.gov/nawqa/sparrow/mrb/ • MRB3 and Mississippi Basin Models: • http://wi.water.usgs.gov/rna/9km30/index.html • Decision Support System • http://water.usgs.gov/nawqa/sparrow/dss/ • MRB3 SPARROW Mapper http://wim.usgs.gov/Sparrow/SparrowMapper.html# • Contacts: • Dale Robertson (dzrobert@usgs.gov) • Dave Saad (dasaad@usgs.gov) • Steve Preston (spreston@usgs.gov)

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