What is included in the definition of stormwater according to regulations?

The definition of stormwater according to regulations encompasses a broader range of water sources than just precipitation or specific types of runoff. It includes stormwater runoff, which is the water that runs off impervious surfaces during a storm event, as well as snow melt runoff, which occurs when snow and ice melt and contribute to the overall water flow. Additionally, surface runoff, which can include water from various surfaces that flows overland rather than being absorbed into the ground, is also part of the definition.

This comprehensive definition is important for understanding how stormwater management practices need to address various types of water that can contribute to erosion, sediment transfer, and potential pollution in waterways. Proper management requires a holistic approach, considering all sources of water that may carry contaminants or sediment. The other choices are limited in scope, focusing only on specific aspects of stormwater, missing the full range of what it encompasses according to regulations.