What does it mean when rivers are affected by season?

When rivers are affected by season, it refers to the variations in water flow, temperature, and ecological conditions that occur throughout the year due to seasonal changes. For instance, during spring and early summer, snowmelt and increased rainfall can lead to higher water levels and stronger currents, while in winter, lower temperatures may reduce flow rates and freeze sections of the river. These seasonal fluctuations can impact aquatic habitats, fish migration patterns, and water quality, influencing the overall health of the river ecosystem.