Table 3. Number of days dissolved oxygen was simulated to be less than the 30-day criteria (and the average amount less than the criteria) at selected Oregon Department of Environmental Quality compliance locations for scenario 3 under the base case and Total Maximum Daily Load scenarios, Klamath River, Oregon, for years 2006–09.


[30-day criteria is based on Oregon Department of Environmental Quality regulations (Oregon Department of Environmental Quality, 2011). Abbreviations: segment, model segment; TMDL, total maximum daily load; WWTP, wastewater treatment plant; mg/L, milligram per liter]


Scenario		Days less than 30-day dissolved oxygen criteria (and average less than the criteria, in mg/L)
		Klamath River at WWTP inflows (segments 4, 8)	Klamath River at Lost River Diversion Channel inflow	Klamath River at Miller Island	Klamath River at Klamath Straits Drain inflow	Klamath River at Keno
		Segment 8	Segment 19	Segment 38	Segment 69	Segment 95
2006
3(1a)	Base case (current conditions)	101 (1.2)	119 (1.8)	124 (2.7)	127 (2.8)	128 (2.7)
3(1b)	Sources at TMDL allocations	101 (1.2)	118 (1.7)	124 (2.6)	125 (2.6)	124 (2.4)
3(2a)	Link River at TMDL target	0	0	16 (0.1)	85 (0.3)	27 (0.5)
3(2b)	Link River and sources at TMDL	0	0	0	69 (0.2)	0
2007
3(1a)	Base case (current conditions)	98 (1.8)	111 (2.5)	123 (3.1)	122 (3.1)	108 (2.3)
3(1b)	Sources at TMDL allocations	98 (1.8)	110 (2.5)	121 (3.1)	114 (3.2)	102 (2.1)
3(2a)	Link River at TMDL target	0	0	9 (0.1)	69 (0.4)	0
3(2b)	Link River and sources at TMDL	0	0	0	62 (0.3)	0
2008
3(1a)	Base case (current conditions)	97 (2.3)	119 (3.1)	138 (3.3)	143 (3.1)	142 (3.2)
3(1b)	Sources at TMDL allocations	97 (2.3)	119 (3.1)	137 (3.3)	141 (3.0)	140 (3.0)
3(2a)	Link River at TMDL target	0	4 (0.2)	22 (0.2)	41 (0.1)	82 (0.3)
3(2b)	Link River and sources at TMDL	0	3 (0.2)	20 (0.2)	19 (0.1)	0
2009
3(1a)	Base case (current conditions)	104 (2.3)	122 (3.3)	136 (3.7)	142 (3.4)	140 (3.5)
3(1b)	Sources at TMDL allocations	103 (2.3)	122 (3.3)	136 (3.6)	140 (3.4)	136 (3.4)
3(2a)	Link River at TMDL target	0	0	0	86 (0.1)	78 (0.3)
3(2b)	Link River and sources at TMDL	0	0	0	57 (0.1)	0

First posted July 24, 2013