What is the likely effect of unmanaged stormwater runoff?

Unmanaged stormwater runoff typically leads to soil erosion and the degradation of water quality. When rainwater runs off impervious surfaces such as roads and parking lots, it can carry pollutants such as sediments, chemicals, and debris directly into nearby water bodies without any treatment. This can lead to several negative environmental impacts.

The physical force of the water can erode soil. When topsoil is washed away, the land loses its nutrient-rich layer, which is essential for healthy plant growth and soil structure. Additionally, this erosion can lead to sedimentation in rivers and streams, further impacting aquatic habitats.

Moreover, pollutants that accompany stormwater runoff can lead to a decline in water quality in lakes, rivers, and coastal areas. Nutrient loading from fertilizers, for example, can cause harmful algal blooms, which deplete oxygen and harm aquatic life. These consequences highlight the critical need for effective stormwater management practices to mitigate the risks associated with unmanaged runoff.