What is the maximum load that can be transported for a given discharge called?

The maximum load that can be transported for a given discharge is termed 'stream transport capacity.' This concept refers to the ability of a stream or river to carry sediment and other materials as water flows through it. Transport capacity is influenced by factors such as the speed of the water, the size and type of sediment, and the gradient of the streambed. It essentially indicates how much material can be moved downstream by the flowing water before it settles due to lack of energy.

Other terms provided, while related to stream dynamics, do not specifically denote the maximum load that can be carried for a specific discharge. Stream load generally refers to the actual amount of sediment being transported at a given time, not the capacity. Stream discharge value quantifies the volume of water flowing through a section of the stream per unit of time and does not directly reflect the sediment it can carry. Stream energy level relates to the kinetic energy available in the water flow but does not explicitly define the transport capacity. Hence, the term 'stream transport capacity' aptly encapsulates the concept of maximum potential load transport for a defined discharge scenario.