Undershot Waterwheel/Water Turbine

Undershot waterwheel / water turbine works when running water hit the wall of blades located at the bottom of waterwheel. Undershot waterwheel type does not have the additional advantage of the head. This type is suitable mounted on the shallow water on a flat area. This type is also called the "Vitruvian". Here the water flows opposite with the direction of blades that rotates waterwheel.

Figure 1: Undershot Waterwheel/Water Turbine

The following below is advantages and disadvantages of using undershot waterwheel / water turbine:

Advantages of undershot waterwheel:

1. Simpler construction.
2. More economical.
3. Undershot waterwheel is easy to move.

Disadvantages of undershot waterwheel:

1. Undershot waterwheel / water turbine has small efficiency.
2. The power which is generated is relatively small.