What is Runoff?
Runoff
Runoff is the water that flows over the ground surface when it rains or when snow melts. This water can carry pollutants and nutrients into rivers, lakes, and oceans, affecting water quality and ecosystems.
Overview
Runoff occurs when precipitation, such as rain or melting snow, falls onto the ground and cannot be absorbed by the soil. Instead of soaking in, the water flows across the surface, gathering speed and volume as it moves. This process is significant because it can lead to erosion, transport pollutants, and contribute to flooding in certain areas. The water that runs off can pick up various substances from the land, including chemicals from fertilizers, oil from roads, and trash. These pollutants can end up in nearby water bodies, harming aquatic life and degrading water quality. For example, when heavy rains wash fertilizers from farms into rivers, it can lead to algal blooms that deplete oxygen in the water, making it difficult for fish and other organisms to survive. Understanding runoff is important for managing water resources and protecting ecosystems. By implementing practices such as creating rain gardens or using permeable materials in urban areas, we can reduce the amount of runoff and its negative effects. This not only helps maintain cleaner water in our rivers and oceans but also supports healthier environments for wildlife.