Table 2. Tidal rating curve model coefficients (k1, k2, k3, k4, standard errors, and t-statistics) for the validation and test sites under baseflow conditions.
| Site | k1 ± SE (tStat) |
k2 ± SE (tStat) |
k3 ± SE (tStat) | k4 ± SE (tStat) | Calibration Adj. R2 | Validation R2 |
|---|---|---|---|---|---|---|
| Tidal USGS Model Validation Sites | ||||||
| CON | -2408.66 ± 32.63 | 1784.70 ± 28.36 | 7.20 ± 0.52 | -99.22 ± 1.14 | 0.82 | 0.82 |
| (-73.83) | (62.94) | (13.78) | (-87.32) | |||
| PLU | 1.69 ± 0.55 | 2.02 ± 0.61 | 0.06 ± 0.00 | -4.82 ± 0.04 | 0.92 | 0.86 |
| (3.09) | (3.34) | (16.76) | (-129.99) | |||
| MUR | -140.95 ± 7.96 | 53.54 ± 10.78 | 1.14 ± 0.06 | -12.60 ± 0.17 | 0.79 | 0.72 |
| (-17.71) | (4.97) | (18.79) | (-74.53) | |||
| MID | 62.20 ± 2.48 | -99.29 ± 2.64 | 1.05 ± 0.02 | -21.87 ± 0.21 | 0.90 | 0.74 |
| (25.06) | (-37.63) | (63.66) | (-106.60) | |||
| SAV | 690.80 ± 34.86 | -2937.24 ± 28.13 | 4.82 ± 0.24 | -444.94 ± 2.30 | 0.97 | 0.96 |
| (19.82) | (-104.40) | (19.86) | (-193.05) | |||
| OGE | -55.68 ± 3.62 | 0.00 | 2.79 ± 0.08 | -43.15 ± 0.49 | 0.85 | 0.69 |
| (-15.39) | (34.80) | (-88.61) | ||||
| STM | 82.77 ± 11.05 | -771.16 ± 5.93 | 2.87 ± 0.08 | -67.99 ± 0.48 | 0.96 | 0.89 |
| (7.49) | (-130.03) | (37.40) | (-142.39) | |||
| CHA | -100.89 ± 3.13 | 57.69 ± 1.72 | 0.00 | -9.30 ± 0.11 | 0.85 | 0.81 |
| (-32.25) | (33.49) | (-88.57) | ||||
| HAL | -73.56 ± 4.89 | 13.88 ± 1.31 | 1.21 ± 0.12 | -5.24 ± 0.07 | 0.85 | 0.59 |
| (-15.05) | (10.59) | (10.38) | (-79.84) | |||
| CRY | -20.50 ± 0.56 | 82.46 ± 2.21 | -1.62 ± 0.11 | -41.17 ± 0.21 | 0.97 | 0.96 |
| (-36.33) | (37.31) | (-14.79) | (-200.16) | |||
| MOB | -3740.80 ± 75.28 | 2079.38 ± 43.20 | -9.20 ± 3.36 | -113.23 ± 2.84 | 0.74 | 0.52 |
| (-49.69) | (48.13) | (-2.74) | (-39.81) | |||
| SHA | -1230.88 ± 36.00 | -919.98 ± 16.40 | -9.10 ± 0.26 | -22.94 ± 0.60 | 0.85 | 0.71 |
| (-34.19) | (-56.09) | (-34.81) | (-38.08) | |||
| Aransas and Mission River Model Application Sites | ||||||
| A1 | 0.67 ± 0.15 | -1.06 ± 0.27 | 0.00 | -2.59 ± 0.38 | 0.44 | n/a |
| (4.44) | (-4.00) | (-6.73) | ||||
| A2 | 0.00 | 0.39 ± 0.10 | -2.22 ± 0.92 | -1.11 ± 0.27 | 0.50 | n/a |
| (3.96) | (-2.42) | (-4.09) | ||||
| A3 | -3.43 ± 0.37 | 7.39 ± 0.85 | 0.00 | -8.76 ± 0.32 | 0.94 | n/a |
| (-9.20) | (8.73) | (-27.05) | ||||
| A4 | -2.22 ± 0.62 | 5.63 ± 1.50 | 4.40 ± 1.60 | -10.47 ± 0.63 | 0.83 | n/a |
| (-3.6) | (3.74) | (2.75) | (-16.67) | |||
| A5 | * | * | * | * | * | n/a |
| M1 | -0.30 ± 0.03 | 0.00 | 0.00 | 0.00 | 0.17 | n/a |
| (-8.90) | ||||||
| M2 | ** | ** | ** | ** | ** | n/a |
| M3 | 0.63 ± 0.15 | -1.01 ± 0.24 | -4.35 ± 0.48 | 0.00 | 0.69 | n/a |
| (4.22) | (-4.28) | (-9.10) | ||||
| M4 | 0.28 ± 0.05 | 0.00 | 0.00 | -5.58 ± 0.80 | 0.81 | n/a |
| (5.48) | (-7.00) | |||||
| M5 | -6.23 ± 1.29 | 18.84 ± 3.92 | 0.00 | 0.00 | 0.51 | n/a |
| (-4.83) | (4.81) | |||||
Coefficient p-values were all between 0.00 and 1.85 x 10−2. Values of ki = 0.00 indicate terms not included in a site’s final model (see section 2.4.1).
* No ADP transects were collected for calibration at site A5 due to safety concerns.
** Insufficient monitoring data were collected at site M2 for calibration due to instrumentation issues.