What does 'travel time' refer to in drainage terminology?

In drainage terminology, 'travel time' specifically refers to the total time taken for runoff to travel from one point in a drainage area to another. This concept is essential in understanding how quickly stormwater moves through a landscape, which can significantly influence flood dynamics, water quality, and the design of drainage systems. Evaluating travel time helps engineers and planners make informed decisions about managing stormwater runoff, predicting peak flow rates, and designing effective drainage systems that mitigate flooding risks.

Analyzing travel time is critical for modeling the behavior of runoff during rainfall events, allowing for accurate predictions of when and where water will reach specific points in a drainage system. It aids in floodplain management and infrastructure design, ensuring that such systems can handle the expected flow rates and volumes effectively.