其中变化最为明显的是流域 III 级河流指标增加速率均达到 20以上其次为 I 级河流达到 15以上最后为 II 级河流基本小于 4。

The most significant changes are observed in the third-level river basins, with growth rates exceeding 20% for the indicators. The first-level river basins show an increase of over 15%, while the second-level river basins exhibit a growth rate of less than 4%.