Alternative Calculation of Chlorophyll a to Total Phosphorus Ratio

Alternative Calculation of Chlorophyll a to TP Ratio

Reservoirs with a Low Level of Concern

Segment Lake/Reservoir Name TP Mean Chlorophyll a -0.01[ln(mg/L Chl a)]/ No. (mg/L) Mean (mg/L) (mg/L TP) 0208 Lake Crook 0.170 0.00477 0.31 0212 Lake Arrowhead 0.119 0.00539 0.44 0213 Lake Kickapoo 0.067 0.00368 0.84 0219 Lake Wichita 0.164 0.03323 0.21 0229 Lake Tanglewood 1.081 0.01994 0.04 0302 Wright Patman Lake 0.087 0.01251 0.50 0509 Murvaul Lake 0.047 0.01972 0.84 0603 B. A. Steinhagen Lake 0.065 0.00675 0.77 0803 Lake Livingston 0.156 0.01704 0.26 0815 Bardwell Reservoir 0.046 0.01046 0.99 0818 Cedar Creek Reservoir 0.057 0.01639 0.72 0823 Lewisville Lake 0.047 0.01077 0.96 0827 White Rock Lake 0.086 0.02055 0.45 0830 Benbrook Lake 0.055 0.01604 0.75 1002 Lake Houston 0.189 0.00628 0.27 (1208) Millers Creek Reservoir 0.062 0.01034 0.74 1212 Somerville Lake 0.053 0.02073 0.73 1222 Proctor Lake 0.048 0.01800 0.84 1225 Waco Lake 0.064 0.00634 0.79 1228 Lake Pat Cleburne 0.060 0.01049 0.76 1235 Lake Stamford 0.057 0.01043 0.80 (1241) Buffalo Springs Lake 0.122 0.03549 0.27 1422 Lake Nasworthy 0.045 0.01169 0.99 1425 O.C. Fisher Lake 0.051 0.01025 0.90 2103 Lake Corpus Christi 0.151 0.00816 0.32 (2454) Cox Creek Lake 0.265 0.00785 0.18

- 1 - Reservoirs with a Moderate Level of Concern

Segment Lake/Reservoir Name TP Mean Chlorophyll a -0.01[ln(mg/L Chl a)]/ No. (mg/L) Mean (mg/L) (mg/L TP) 0203 Lake Texoma 0.044 0.00654 1.14 0401 Caddo Lake 0.042 0.00682 1.19 0507 Lake Tawakoni 0.039 0.01260 1.12 0510 Lake Cherokee 0.048 0.00569 1.08 0512 Lake Fork Reservoir 0.033 0.00838 1.45 0817 Navarro Mills Lake 0.042 0.00800 1.15 0826 Grapevine Lake 0.034 0.00753 1.44 0832 Lake Weatherford 0.038 0.00586 1.35 0836 Richland-Chambers Reservoir 0.033 0.01030 1.39 1012 Lake Conroe 0.032 0.00922 1.46 1205 Lake Granbury 0.035 0.01376 1.22 1230 Lake Palo Pinto 0.050 0.00337 1.14 1236 Fort Phantom Hill Reservoir 0.044 0.00532 1.19 1247 Granger Lake 0.036 0.00665 1.39 1252 Lake Limestone 0.033 0.01165 1.35 1254 Aquilla Reservoir 0.034 0.00836 1.41 (1412) Lake Colorado City 0.035 0.01021 1.31 (1416) Brady Reservoir 0.030 0.01462 1.41 2116 Choke Canyon Reservoir 0.044 0.00777 1.10 2303 International Falcon Reservoir 0.038 0.00943 1.23 2312 Red Bluff Reservoir 0.034 0.01197 1.30

- 2 - Reservoirs with a High Level of Concern

Segment Lake/Reservoir Name TP Mean Chlorophyll a -0.01[ln(mg/L Chl a)]/ No. (mg/L) Mean (mg/L) (mg/L TP) 0102 Lake Meredith 0.019 0.00246 3.16 0209 Pat Mayse Lake 0.029 0.00764 1.68 0210 Farmers Creek Reservoir/ 0.024 0.00317 2.40 Lake Nocona 0215 Diversion Lake 0.031 0.00534 1.69 0217 Lake Kemp 0.027 0.00517 1.95 0223 Greenbelt Lake 0.017 0.00259 3.50 0228 Mackenzie Reservoir 0.019 0.00264 3.12 0403 Lake O' the Pines 0.027 0.00664 1.86 0405 Lake Cypress Springs 0.026 0.00741 1.89 0504 Toledo Bend Reservoir 0.033 0.00621 1.54 0605 Lake Palestine 0.029 0.00914 1.62 0610 Sam Rayburn Reservoir 0.024 0.00436 2.26 0613 Lake Tyler East 0.022 0.00772 2.21 0613 Lake Tyler 0.018 0.00502 2.94 0614 Lake Jacksonville 0.017 0.00302 3.41 0807 Lake Worth 0.030 0.00638 1.68 0809 Eagle Mountain Reservoir 0.022 0.01132 2.04 0811 Bridgeport Reservoir 0.031 0.00357 1.82 0813 Houston County Lake 0.022 0.00502 2.41 0816 Lake Waxahachie 0.032 0.00473 1.67 0828 Lake Arlington 0.024 0.01599 1.72 0834 Lake Amon G. Carter 0.035 0.00416 1.57 1203 Whitney Lake 0.018 0.00473 2.97 1207 Possum Kingdom Lake 0.029 0.00628 1.75 1216 Stillhouse Hollow Lake 0.015 0.00150 4.33 1220 Belton Lake 0.016 0.00347 3.54 1224 Leon Reservoir 0.021 0.00504 2.52 1231 Lake Graham 0.034 0.00390 1.63 1233 Hubbard Creek Reservoir 0.029 0.00368 1.93

- 3 - Segment Lake/Reservoir Name TP Mean Chlorophyll a -0.01[ln(mg/L Chl a)]/ No. (mg/L) Mean (mg/L) (mg/L TP) 1234 Lake Cisco 0.016 0.00175 3.97 1237 Lake Sweetwater 0.031 0.00849 1.54 1240 White River Lake 0.019 0.00265 3.12 1249 Lake Georgetown 0.014 0.00263 4.24 1403 Lake Austin 0.014 0.00237 4.32 1404 Lake Travis 0.012 0.00206 5.15 1405 Marble Falls Lake 0.021 0.00496 2.53 1406 Lake Lyndon B. Johnson 0.019 0.00443 2.85 1407 Inks Lake 0.019 0.00664 2.64 1408 Lake Buchanan 0.014 0.00421 3.91 1411 E. V. Spence Reservoir 0.023 0.00681 2.17 1418 Lake Brownwood 0.017 0.00263 3.49 1419 Lake Coleman 0.016 0.00364 3.51 1423 Twin Buttes Reservoir 0.024 0.00577 2.15 (1426) Oak Creek Reservoir 0.023 0.00436 2.36 1429 Town Lake/Lady Bird Lake 0.028 0.00274 2.11 1433 O. H. Ivie Reservoir 0.022 0.00445 2.46 1805 Canyon Lake 0.038 0.00191 1.65 1904 Medina Lake 0.016 0.00204 3.87 2305 International Amistad Reservoir 0.014 0.00144 4.67

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