Seasonal runoff refers to the flow of water that occurs during specific times of the year, primarily due to melting snow or increased rainfall. This phenomenon is most common in regions with distinct seasons, where winter snowpack melts in spring, leading to higher river and stream levels. The amount and timing of seasonal runoff can significantly impact ecosystems, agriculture, and water supply. For example, rivers may experience flooding during peak runoff periods, while reservoirs can benefit from the influx of water, helping to replenish supplies for irrigation and drinking water.