Table 2 Theil–Sen Median-Mann–Kendall trend test category table.
From: Analysis of ecological quality changes and influencing factors in Xiangjiang River Basin
β | Z | Trend characteristics |
|---|---|---|
β > 0 | Z > 1.96 | Significant degradation |
Z < 1.96 | Slight degradation | |
β = 0 | Z | No change |
β < 0 | Z < 1.96 | Slight improvement |
Z > 1.96 | Significant improvement |
