| Sampling station | Season | Data period | Kendall’s tau | S | Var (S) | p-value (Two-tailed) | alpha | Sen’s slope | Sen’s Intercept | Significant Trend | Trend Tendency | ||||
| Slope | Lower bound (95%) | Upper bound (95%) | Intercept | Lower bound (95%) | Upper bound (95%) | ||||||||||
| Intake | Wet | 2004-2018 | 0.201 | 801 | 292934 | 0.139 | 0.05 | 0.001 | 0.000 | 0.002 | −33.423 | −48.34 | −17.76 | No | |
| Dry | 0.238 | 948 | 240327 | 0.053 | 0.05 | 0.001 | 0.000 | 0.001 | −29.701 | −38.77 | −18.33 | No | |||
| Node | Wet | 2004-2018 | 0.027 | 107 | 175056 | 0.800 | 0.05 | 0.000 | 0.000 | 0.000 | 0.404 | −2.87 | 1.05 | No | |
| Dry | −0.136 | −542 | 124308 | 0.125 | 0.05 | 0.000 | 0.000 | 0.000 | 1.868 | 1.226 | 2.638 | No | |||
| FIPAG | Wet | 2004-2018 | −0.022 | −89 | 138757 | 0.813 | 0.05 | 0.000 | 0.000 | 0.000 | 0.045 | 0.005 | 0.093 | No | |
| Dry | 0.105 | 419 | 257889 | 0.410 | 0.05 | 0.000 | 0.000 | 0.000 | −0.045 | −0.083 | −0.003 | No | |||
| Lionde | Wet | 2004-2018 | 0.236 | 944 | 220382 | 0.045 | 0.05 | 0.001 | 0.000 | 0.001 | −26.340 | −34.92 | −17.473 | Yes | Increasing |
| Dry | 0.217 | 869 | 246839 | 0.081 | 0.05 | 0.001 | 0.000 | 0.001 | −25.726 | −32.99 | −15.914 | No | |||
| Massawasse | Wet | 2004-2018 | 0.089 | 355 | 180426 | 0.405 | 0.05 | 0.000 | 0.000 | 0.000 | −0.906 | −2.41 | 0.425 | No | |
| Dry | 0.227 | 907 | 197864 | 0.042 | 0.05 | 0.000 | 0.000 | 0.000 | −1.759 | −2.40 | −1.116 | Yes | Increasing | ||
| Conhane | Wet | 2004-2018 | 0.064 | 254 | 137904 | 0.496 | 0.05 | 0.000 | 0.000 | 0.000 | −0.343 | −1.153 | 0.376 | No | |
| Dry | 0.126 | 502 | 168236 | 0.222 | 0.05 | 0.000 | 0.000 | 0.000 | −0.403 | −0.775 | −0.075 | No | |||
| Nico | Wet | 2004-2018 | −0.290 | −1161 | 397295 | 0.066 | 0.05 | 0.000 | 0.000 | 0.000 | 0.516 | 0.393 | 0.665 | No | |
| Dry | 0.084 | 336 | 99476 | 0.288 | 0.05 | 0.000 | 0.000 | 0.000 | −0.019 | −0.064 | 0.021 | No | |||
| Muianga | Wet | 2004-2018 | −0.219 | −877 | 181831 | 0.040 | 0.05 | 0.000 | 0.000 | 0.000 | 0.446 | 0.285 | 0.621 | Yes | Decreasing |
| Dry | −0.170 | −681 | 161245 | 0.090 | 0.05 | 0.000 | 0.000 | 0.000 | 0.206 | 0.134 | 0.266 | No | |||
| Marrambajane | Wet | 2004-2018 | −0.388 | −1549 | 579754 | 0.042 | 0.05 | 0.000 | 0.000 | 0.000 | 4.367 | 3.732 | 5.202 | Yes | Decreasing |
| Dry | −0.486 | −1946 | 1056049 | 0.058 | 0.05 | 0.000 | 0.000 | 0.000 | 4.626 | 4.091 | 5.133 | No | |||