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NHDPlus Applications—What is this good for?

The NHDPlus Applications provide critical tools for water protection and habitat modeling. A notable example is the Incident Command Tool for Drinking Water Protection (ICWater), used during the West Virginia chemical spill to manage and warn downstream suppliers effectively. By utilizing NHDPlus flows and real-time data, accurate travel-time estimates safeguarded water supplies for over 60 agencies. Additionally, the NorWest Stream Temperature/Habitat Modeling enhances our understanding of climate impacts on habitats, aiding in strategic habitat restoration efforts.

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NHDPlus Applications—What is this good for?

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  1. NHDPlus Applications—What is this good for? • Two examples for today: • West Virginia Chemical Spill • NorWest Stream Temperature/Habitat Modeling • More application examples:http://www.horizon-systems.com/NHDPlus/applications.php

  2. West Virginia Chemical Spill • Spill one mile upstream from water treatment plant • Incident Command Tool for Drinking Water Protection (ICWater) used to warn downstream water suppliers • Uses NHDPlus flows and velocities • Adjusts with real-time gage data • Provided accurate travel-time estimates • Protected Cincinnati water supply and others

  3. Measured velocity Intake Spill site Model velocity

  4. Downstream trace Spill site

  5. Intakes near Cincinnati 120 hours

  6. >45,000,000 hourly records >15,000 unique stream sites >60 agencies $10,000,000

  7. Statistically Valid, Unbiased Information from Stream Databases Non-spatial Stream Temp = – 0.0064*Elevation (m) + 0.0104*Radiation + 0.39*AirTemp (°C) – 0.17*Flow (m3/s) Spatial Stream Temp = – 0.0045*Elevation (m) + 0.0085*Radiation + 0.48*AirTemp(°C) – 0.11*Flow(m3/s) Mean Summer Stream Temp 1:1 line r2 = 0.68; RMSE = 1.54°C Parameter estimates are different because of autocorrelation in database Non-spatial Model Predicted (°C) 1:1 line r2 = 0.93; RMSE = 0.74°C Spatial Model Observed (°C) Isaak et al. 2010. Ecol. Apps. 20:1350-1371

  8. Climate Effects on Bull Trout Thermal Habitat Historic (1993-2011 Average August) Suitable Lochsa R. Clearwater R. Unsuitable < 11.0˚C Selway R. Salmon R.

  9. Climate Effects on Bull Trout Thermal Habitat +1.50˚C Stream Temp (~2040s) Suitable Lochsa R. Clearwater R. Unsuitable < 11.0˚C Selway R. Salmon R.

  10. Climate Effects on Bull Trout Thermal Habitat +3.00˚C Stream Temp (~2080s) Suitable Lochsa R. Clearwater R. Unsuitable < 11.0˚C Selway R. Salmon R.

  11. StrategicPrioritization of Habitat Restoration Lots of things we can do… • Maintaining/restoring flow… • Maintaining/restoring riparian… • Restoring channel form/function… • Prescribed burns limit wildfire risks… • Non-native species control… • Improve/impede fish passage… But where to do it? Low Priority High Priority

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