What best defines static water?

The definition of static water refers to water that is not flowing or moving. It is characterized by being confined within a specific area without any downstream movement. This means that the water remains essentially still, differentiating it from flowing water, such as that found in rivers or streams. Static water varies in size, from small ponds to larger lakes, but the key characteristic is its lack of movement.

In contrast, the other options represent different forms or states of water. Moving water, such as that in a stream, is characterized by its continuous flow, which is not consistent with the definition of static water. Water that is frozen would not be considered static in the context of aquatic pest control, as the term generally relates to water that is in a liquid state and available for pest activity. While a reservoir contains water, it can also include elements of flow and management that do not strictly align with the concept of static water.

Thus, the best definition of static water is indeed water confined within a known area with no downstream movement, emphasizing its stillness and the absence of flow.