Table 4. Number of days pH was simulated to be greater than the 9.0 criteria (and the 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 input total inorganic carbon 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; WWTP, wastewater treatment plant]
| Scenario |
Days out of compliance with pH criteria (and average amount greater than the criteria) |
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) |
90 (0.30) |
69 (0.21) |
53 (0.19) |
28 (0.13) |
8 (0.10) |
| 3(1b) |
Sources at TMDL allocations |
90 (0.30) |
74 (0.22) |
55 (0.20) |
29 (0.14) |
14 (0.11) |
| 3(2a) |
Link River at TMDL target |
112 (0.51) |
93 (0.40) |
94 (0.37) |
73 (0.28) |
62 (0.23) |
| 3(2b) |
Link River and sources at TMDL |
112 (0.51) |
101 (0.41) |
104 (0.38) |
86 (0.30) |
79 (0.30) |
| 2007 |
| 3(1a) |
Base case (current conditions) |
52 (0.44) |
32 (0.55) |
24 (0.72) |
21 (0.58) |
24 (0.55) |
| 3(1b) |
Sources at TMDL allocations |
53 (0.43) |
33 (0.55) |
24 (0.72) |
22–23
(0.58–0.57) |
26–27
(0.52–0.55) |
| 3(2a) |
Link River at TMDL target |
7–105
(0.08-0.46) |
9–77
(0.08–0.54) |
23–78
(0.15–0.51) |
18–64
(0.24–0.47) |
52–93
(0.23–0.50) |
| 3(2b) |
Link River and sources at TMDL |
6–106
(0.07–0.46) |
8–78
(0.06–0.54) |
23–79
(0.13–0.50) |
19–71
(0.22–0.46) |
78–102
(0.23–0.57) |
| 2008 |
| 3(1a) |
Base case (current conditions) |
102 (0.44) |
69 (0.39) |
49 (0.36) |
24 (0.18) |
9 (0.11) |
| 3(1b) |
Sources at TMDL allocations |
103 (0.44) |
71 (0.39) |
49 (0.36) |
29 (0.18) |
15 (0.12) |
| 3(2a) |
Link River at TMDL target |
142 (0.65) |
127 (0.54) |
110 (0.51) |
73 (0.43) |
61 (0.38) |
| 3(2b) |
Link River and sources at TMDL |
143 (0.65) |
135 (0.53) |
119 (0.51) |
92 (0.38) |
79 (0.39) |
| 2009 |
| 3(1a) |
Base case (current conditions) |
90 (0.45) |
68 (0.35) |
43 (0.27) |
13 (0.27) |
13 (0.23) |
| 3(1b) |
Sources at TMDL allocations |
91 (0.44) |
70 (0.35) |
45 (0.27) |
15 (0.31) |
15 (0.29) |
| 3(2a) |
Link River at TMDL target |
106 (0.74) |
101 (0.69) |
98 (0.63) |
83 (0.45) |
82 (0.40) |
| 3(2b) |
Link River and sources at TMDL |
106 (0.74) |
101 (0.70) |
99 (0.64) |
88 (0.48) |
90 (0.48) |
|
First posted July 24, 2013
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U.S. Department of the Interior |
U.S. Geological Survey