Skip Links

USGS - science for a changing world

Scientific Investigations Report 2013–5135


Modeling the Water-Quality Effects of Changes to the Klamath River Upstream of Keno Dam, Oregon


Table 6. Number of days chronic ammonia toxicity was greater than criteria (and average amount greater 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.


[2007 runs were bracketed by also using TIC calculated with pH during low-bloom conditions (leftmost values when a range is given) for the Link River, Lost River Diversion Channel, and Klamath Straits Drain inputs. Abbreviations: TMDL, total maximum daily load; segment, model segment; N, nitrogen; WWTP, wastewater treatment plant; mg/L, milligram per liter]


Scenario Days greater than chronic ammonia toxicity criteria
(and average greater than the criteria, as ammonia, in mg/L N)
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) 111 (0.19) 101 (0.21) 98 (0.29) 79 (0.29) 68 (0.28)
3(1b) Sources at TMDL allocations 111 (0.19) 102 (0.20) 97 (0.28) 78 (0.28) 70 (0.27)
3(2a) Link River at TMDL target 122 (0.12) 117 (0.10) 119 (0.14) 109 (0.16) 101 (0.15)
3(2b) Link River and sources at TMDL 123 (0.12) 119 (0.10) 118 (0.13) 110 (0.14) 114 (0.11)
2007
3(1a) Base case (current conditions) 84 (0.21) 74 (0.32) 69 (0.35) 54 (0.33) 60 (0.34)
3(1b) Sources at TMDL allocations 85 (0.21) 74 (0.32) 70 (0.35) 50–53
(0.33–0.32)
62–62
(0.33–0.32)
3(2a) Link River at TMDL target 11–110
(0.02–0.07)
20–76
(0.05–0.12)
29–83

(0.09–0.16)
33–86
(0.08–0.20)
83–91
(0.09–0.12)
3(2b) Link River and sources at TMDL 12–111
(0.02–0.07)
19–81
(0.05–0.12)
38–85
(0.08–0.16)
28–87
(0.08–0.18)
65–86
(0.07–0.08)
2008
3(1a) Base case (current conditions) 118 (0.16) 82 (0.23) 71 (0.35) 49 (0.37) 47 (0.34)
3(1b) Sources at TMDL allocations 118 (0.16) 87 (0.23) 73 (0.34) 49 (0.35) 46 (0.34)
3(2a) Link River at TMDL target 137 (0.08) 134 (0.09) 149 (0.12) 134 (0.15) 109 (0.17)
3(2b) Link River and sources at TMDL 136 (0.08) 144 (0.09) 158 (0.12) 151 (0.13) 133 (0.12)
2009
3(1a) Base case (current conditions) 118 (0.19) 110 (0.22) 94 (0.26) 43 (0.21) 27 (0.20)
3(1b) Sources at TMDL allocations 119 (0.19) 112 (0.22) 95 (0.26) 44 (0.20) 28 (0.18)
3(2a) Link River at TMDL target 129 (0.13) 124 (0.14) 119 (0.16) 98 (0.20) 95 (0.18)
3(2b) Link River and sources at TMDL 129 (0.13) 125 (0.15) 121 (0.16) 98 (0.18) 96 (0.15)

First posted July 24, 2013

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

Part or all of this report is presented in Portable Document Format (PDF); the latest version of Adobe Reader or similar software is required to view it. Download the latest version of Adobe Reader, free of charge.

Accessibility FOIA Privacy Policies and Notices

USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: https://pubs.usgs.gov/sir/2013/5135/table6.html
Page Contact Information: Contact USGS
Page Last Modified: Monday, July 22, 2013, 07:31:24 PM