There are different types of open channels. Depending on the cross-section type, open channels are classified into two types: Prismatic Channels, and Non-Prismatic Channels. A brief discussion of these two type of open channel is given below.
If the cross-section of a channel is uniform throughout its length and the bottom slope is constant, it is called Prismatic Channels.
- Uniform channel cross-section throughout the length.
- Constant bottom slope.
- Prismatic channels can be triangular, rectangular, parabolic, trapezoidal or circular.
- Artificial channels are usually prismatic channels.
If the cross-section of a channel is non-uniform or the bottom slope is not constant, it is called Non-Prismatic Channels.
- Non-uniform channel cross-section
- Varying bottom slope.
- Natural channels are usually non-prismatic channel.