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  

Table 8. Calculated emergence day for each Detroit Lake model scenario based on the day at which the Accumulated Thermal Units (ATUs) for simulated release temperatures reached 1,750 degrees Fahrenheit-day, North Santiam River, Oregon. 

[ATU calculated by the difference of the average daily temperature above 32 degrees Fahrenheit from September 20 through December 31. Dates in January and February were estimated based on model results from each environmental scenario and placed in increasing order according to the hot/ dry scenarios. Bold text refers to scenarios with North Santiam and Santiam River model simulations. “7d_mmwod” prefix signifies the 7-day moving maximum of the without-dams temperature target. All other scenarios were based on the tmax temperature target] 

Scenario identifiers	Scenario description	Structural scenario?	Estimated emergence day			Rank
Scenario identifiers	Scenario description	Structural scenario?	cool/wet	normal	hot/dry	cool/wet	normal	hot/dry	Average
c3,n3,h3	_fixed_elevation	No	Dec. 19	Dec. 24	Dec. 5	20	20	20.5	20.2
c4,n4,h4	_late_refill	No	Dec. 18	Dec. 13	Dec. 5	21	21	20.5	20.8
c5,n5,h5	_early_dd	No	Jan. 14	Jan. 5	Dec. 11	19	19	19	19.0
cwod1, nwod1,hwod1	_wod_base	No	Jan. 26	Jan. 13	Dec. 13	4	9.5	17.5	10.3
c1, n1, h1	_base	No	Jan. 24	Jan. 12	Dec. 13	5	13	17.5	11.8
cwod2, nwod2, hwod2	_wod_noppmin	No	Feb. 1	Jan. 18	Dec. 17	2	2	16	6.7
c2, n2, h2	_noppmin	No	Feb. 8	Jan. 22	Dec. 18	1	1	14.5	5.5
c12, n12, h12	_pp–float_20ppmin	Yes	Jan. 19	Jan. 12	Dec. 18	12.5	13	14.5	13.3
c11, n11, h11	_pp–float_10ppmin	Yes	Jan. 21	Jan. 14	Dec. 21	11	8	12.5	10.5
c16, n16, h16	_uro–float_40ppmin	Yes	Jan. 15	Jan. 6	Dec. 21	17.5	17.5	12.5	15.8
c8, n8, h8	_delay_dd2	No	Jan. 16	Jan. 7	Dec. 22	16	16	10.5	14.2
c6, n6, h6	_delay_dd1	No	Jan. 15	Jan. 6	Dec. 22	17.5	17.5	10.5	15.2
c10, n10, h10	_pp–float_nomins	Yes	Jan. 22	Jan. 15	Dec. 23	9	6	8	7.7
c13, n13, h13	_pp–float_400fmin	Yes	22-Jan	Jan. 15	Dec. 23	9	6	8	7.7
c19, n19, h19	_slider1340–float_400f	Yes	17-Jan	Jan. 12	Dec. 23	15	13	8	12.0
c9, n9, h9	_delay_dd2_noppmin	No	Jan. 23	Jan. 13	Dec. 26	6.5	9.5	6	7.3
c7, n7, h7	_delay_dd1_noppmin	No	Jan. 29	Jan. 17	Dec. 27	3	3.5	4.5	3.7
c15, n15, h15	_uro–float_20ppmin	Yes	Jan. 19	Jan. 12	Dec. 27	12.5	13	4.5	10.0
c18, n18, h18	_delay_dd2_slider1340-float	Yes	Jan. 18	Jan. 12	Dec. 28	14	13	3	10.0
c14, n14, h14	_uro–float_400fmin	Yes	Jan. 22	Jan. 15	Dec. 29	9	6	2	5.7
c17, n17, h17	_slider1340	Yes	Jan. 23	Jan. 17	Dec. 31	6.5	3.5	1	3.7