USGS Scientific Investigations Report 2012–5231  - Simulating Potential Structural and Operational Changes for Detroit Dam on the North Santiam River, Oregon, for Downstream Temperature Management  

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Scientific Investigations Report 2012–5231 

Prepared in cooperation with the U.S. Army Corps of Engineers 
Version 1.1, June 2013

Simulating Potential Structural and Operational Changes for Detroit Dam on the North Santiam River, Oregon, for Downstream Temperature Management  

By Norman L. Buccola, Stewart A. Rounds, Annett B. Sullivan, and John C. Risley

Figures

Figure 1. Location of Detroit Lake, Detroit Dam, and Big Cliff Dam in the North Santiam River basin in western Oregon.

Figure 2. North Santiam and Santiam Rivers and the North Santiam River basin in western Oregon.

Figure 3. Locations of point-source and tributary inflows, withdrawals, and USGS streamflow-gaging stations in the North Santiam and Santiam Rivers downstream of Big Cliff Dam, Oregon.

Figure 4. Monthly mean discharge in the North Santiam River below Boulder Creek (USGS station 14178000) under three scenarios, North Santiam River, Oregon.

Figure 5. Monthly mean stream temperature in the North Santiam River below Boulder Creek (USGS site 14178000) under three scenarios, North Santiam River, Oregon.

Figure 6. Estimated without-dam water temperatures (labeled “wod”) at the Detroit Dam site (DET) compared to measured (USGS station 14181500) hourly water temperatures for the three environmental scenarios, North Santiam River, Oregon.

Figure 7. Comparison of existing structural scenarios with base operational scenarios (scenarios c1, n1, h1) total inflows, total outflows, and modeled water-surface elevation and rule curve, North Santiam River, Oregon.

Figure 8. Modeled water temperature and percent spill for existing structural scenarios with base operational scenarios, and max temperature targets (scenarios c1, n1, h1), North Santiam River, Oregon.

Figure 9. Modeled water temperature, and percent spill for existing structural scenarios with noppmin operational scenarios, and max temperature targets (scenarios c2, n2, h2), North Santiam River, Oregon.

Figure 10. Modeled water temperature and percent spill for existing structural scenarios with base operational scenarios and wo_dams7dADMax temperature targets (scenarios cwod1, nwod1, hwod1), North Santiam River, Oregon.

Figure 11. Modeled water temperature and percent spill for existing structural scenarios with noppmin operational scenarios and wo_dams7dADMax temperature targets (scenarios cwod2, nwod2, hwod2), North Santiam River, Oregon.

Figure 12. Comparison of fixed_elevation operational scenarios (scenarios c3, n3, h3), total inflows, total outflows, modeled water-surface elevation, North Santiam River, Oregon.

Figure 13. Modeled water temperature and percent spill for existing structural scenarios with fixed elevation operational scenarios and max temperature targets (scenarios c3, n3, h3), North Santiam River, Oregon.

Figure 14. Comparison of delay_dd1 operational scenarios (scenarios c6, n6, h6), total inflows, total outflows, modeled water-surface elevation, North Santiam River, Oregon.

Figure 15. Modeled water temperature and percent spill for existing structural scenarios with delay_dd1 operational scenarios and max temperature targets (scenarios c6, n6, h6), North Santiam River, Oregon.

Figure 16. Modeled water temperature and percent spill for existing structural scenarios with delay_dd1_noppmin operations and max temperature targets (scenarios c7, n7, h7), North Santiam River, Oregon.

Figure 17. Comparison of delay_dd2 operational scenarios (scenarios 8, 9, and 18), total inflows; total outflows, modeled water-surface elevation, North Santiam River, Oregon.

Figure 18. Modeled water temperature and percent spill for existing structural scenarios with delay_dd2 operations and max temperature targets (scenarios c8, n8, h8), North Santiam River, Oregon.

Figure 19. Modeled water temperature and percent spill for existing structural scenarios with delay_dd2_noppmin operations and max temperature targets (scenarios c9, n9, h9), North Santiam River, Oregon.

Figure 20. Modeled water temperature and sliding-gate elevation for slider1340 structural scenarios with base operations and max temperature targets (scenarios c17, n17, h17), North Santiam River, Oregon.

Figure 21. Results from pp-float structural scenarios with nomins operations and max temperature targets (scenarios c10, n10, h10), modeled water temperature, outflow from fixed outlet, and outflow from floating outlet, North Santiam River, Oregon.

Figure 22. Results from pp-float structural scenarios with 20ppmin operations and max temperature targets (scenarios c12, n12, h12), modeled water temperature, outflow from fixed outlet, and outflow from floating outlet, North Santiam River, Oregon.

Figure 23. Results from pp-float structural scenarios with 400fmin operations and max temperature targets (scenarios c13, n13, h13), modeled water temperature, outflow from fixed outlet, and outflow from floating outlet, North Santiam River, Oregon.

Figure 24. Results from uro-float structural scenarios with 400fmin operations and max temperature targets (scenarios c14, n14, h14), modeled water temperature, outflow from fixed outlet, and outflow from floating outlet, North Santiam River, Oregon.

Figure 25. Results from uro-float structural scenarios with 20ppmin operations and max temperature targets (scenarios c15, n15, h15), modeled water temperature, outflow from fixed outlet, and outflow from floating outlet, North Santiam River, Oregon.

Figure 26. Results from uro-float structural scenarios with 40ppmin operations and max temperature targets (scenarios c16, n16, h16), modeled water temperature, outflow from fixed outlet, and outflow from floating outlet, North Santiam River, Oregon.

Figure 27. Results from slider1340-float structural scenarios with 400f operations and max temperature targets (scenarios c19, n19, h19), modeled water temperature, outflow from fixed outlet, and sliding outlet elevation, North Santiam River, Oregon.

Figure 28. Computed progression of Accumulated Thermal Units (ATUs) for selected model scenarios, showing the different likely rates of egg incubation over the autumn months, North Santiam River, Oregon. Spring Chinook salmon are likely to hatch when the ATU reaches 1,750 degrees Fahrenheit-day.

Figure 29. Simulated 7-day moving average of the daily maximum water temperature from the North Santiam and Santiam River model under hot/dry environmental conditions and base operations.

Figure 30. Difference between the 7-day moving average of the daily maximum water temperature from the North Santiam and Santiam River model scenarios h8 (existing structures, delay_dd2 operations, and hot/dry conditions) and h1 (existing structures and base operations).

Figure 31. Difference between the 7-day moving average of the daily maximum water temperature from the North Santiam and Santiam River model scenarios h10 (pp-float structures, nomins operations, and hot/dry conditions) and h1 (existing structures and base operations).

Figure 32. Difference between the 7-day moving average of the daily maximum water temperature from the North Santiam and Santiam River model scenarios h17 (slider1340 structures, base operations, and hot/dry conditions) and h1 (existing structures and base operations).

Figure 33. Difference between the 7-day moving average of the daily maximum water temperature from the North Santiam and Santiam River model scenarios h19 (slider1340-float structures, 400f operations, and hot/dry conditions) and h1 (existing structures and base operations).

First posted October 30, 2012

Revised June 11, 2013

Report PDF (5.6 MB)

For additional information contact:
Director, Oregon Water Science Center
U.S. Geological Survey
2130 SW 5th Avenue
Portland, Oregon 97201
http://or.water.usgs.gov

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