sonometer
channel is the path through which water flows,while flow is the transfer of water in channels,on the land surface called suface runoff, or in the soil and ground namely,throughflow,interflow,baseflowrespectively.
Channel flow is how much water flows through a channel.
small channel
Rivers, lakes, canals, even sewers are bodies of water that flow downhill in a channel.
A channel is any natural or artificially constructed water course or pathway through which something can flow.
A flow of water in a channel or bed, as a brook, rivulet, or small river.
the movements of water are called buyoncy or upthrust. Movements of water are called" Flow of Water "
surface runoff (also known as overland flow or terrestrial runoff) is the unconfined flow of water over the ground surface, in contrast to channel runoff (or stream flow)
This is water erosion that does not flow in a channel
About of Blood's flow:A fluid flow is classified as being internal or external, depending on whether the fluid is forced to flow in a confined channel or over a surface. The flow of an unbounded fluid over a surface such as a plate, a wire, or a pipe is external flow. The flow in a pipe or duct is internal flow if the fluid is completely bounded by solid surfaces. The flow of liquids in a duct is called open-channel flow if the duct is only partially filled with the liquid and there is an free surface, e.g. the flows of water in rivers and irrigation ditches.
Where the ground water leakage direction meet into the surface water is called Base flow.