What is the main feature that differentiates shallow flooding from riverine flooding?

The main feature that distinguishes shallow flooding from riverine flooding is the absence of a defined channel or identifiable flow path. In shallow flooding scenarios, water can spread over large areas and may not follow a specific course; it generally occurs when water overflows its banks and inundates surrounding land in a sheet-like manner. This flooding can be influenced by various factors, such as stormwater runoff or localized heavy rainfall, but it does not rely on established riverbanks or channels to dictate how the water flows.

In contrast, riverine flooding is characterized by water that rises in a defined channel or river system, following the course of the riverbanks. Therefore, recognizing this key difference helps in understanding how each type of flooding develops and impacts specific areas, which is crucial for floodplain management and mitigation strategies.