What is meant by 'time of rise' in the context of a hydrograph?

'Time of rise' in the context of a hydrograph refers to the period from the start of increased flow until the peak flow is achieved. This concept is critical for understanding the dynamics of stormwater runoff and the response of a watershed to precipitation events. As rain begins to fall, it eventually contributes to increased streamflow, which is represented on a hydrograph as the rising limb leading up to the peak.

During this time of rise, factors such as land use, soil saturation, and the characteristics of the drainage area influence how quickly water travels to the stream or river system, which is why it’s useful for evaluating peak flows and the overall hydrologic response. Monitoring the time of rise helps in flood forecasting and designing effective drainage systems.

The other options address different aspects of hydrology or hydrologic processes but do not specifically capture the definition of 'time of rise' accurately. Understanding the nuances of these terms is essential for effective stormwater management and planning in landscape architecture.