Table 4 Summary of the minimum adequate models of factors influencing the receiver performance i.e., detection probability in the fluvial and lower estuary
Parameter | χ2-value/F (Df, Fisher scoring index) | Effect direction | p-Value | Correlation with (correlation factor ρ) | |
|---|---|---|---|---|---|
DPF | Water temperature [°C] | χ2(1,5) = 13.52 | − | < 0.001*** | O2-Conc. (− 0.78) |
Water level [cm] | χ2(1,5) = 343.82 | + | < 0.001*** | ||
Current velocity [m/s] | χ2(1,5) = 247.11 | − | < 0.001*** | ||
Wind speed [m/s] | χ2(1,5) = 47.77 | − | < 0.001*** | ||
Precipitation [mm] | χ2(1,5) = 4.28 | + | 0.038* | ||
Water level difference [cm] | χ2(1,5) = 1296.44 | − | < 0.001*** | ||
Azimuth | χ2(1,5) = 759 | + | 0.033* | ||
Tilt [°] | χ2(1,5) = 5.85 | − | 0.016* | ||
Noise [dB] | χ2(1,5) = 632.23 | − | < 0.001*** | ||
DPL | Water temperature [°C] | χ2(1,8) = 103 | + | < 0.001*** | El. Conductivity (0.87) O2-Conc. (− 0.91) |
Water level [cm] | χ2(1,8) = 64 | − | < 0.001*** | ||
Current velocity [m/s] | χ2(1,8) = 502 | − | < 0.001*** | ||
Wind speed [m/s] | χ2(1,8) = 3133 | − | < 0.001*** | ||
Precipitation [mm] | χ2(1,8) = 4 | − | 0.038* | ||
Water level difference [cm] | χ2(1,8) = 685 | − | < 0.001*** | ||
Distance [m] | χ2(1,8) = 43,173 | − | < 0.001*** | ||
Noise [dB] | χ2(1,8) = 1256 | − | < 0.001*** | ||
Tilt [°] | χ2(1,8) = 120 | − | < 0.001*** | ||
Azimuth | χ2(1,8) = 2 | + | 0.189 | ||
Azimuth*Tilt [°] | χ2(1,8) = 25 | − | < 0.001*** | ||
Distance [m] *Noise [dB] | χ2(1,8) = 86 | − | < 0.001*** |