Submerged pipe outlet is an example of a non-modular outlet.

Explanation:
Non-modular outlet refers to a type of outlet structure used in hydraulic engineering, particularly in drainage systems. It is designed to discharge water from a pipe or channel into a receiving water body, such as a river, lake, or reservoir.

Submerged pipe outlet, also known as a submerged outfall or submerged discharge, is a specific type of non-modular outlet. It involves the discharge of water from a pipe or conduit that is submerged below the water surface of the receiving water body. This type of outlet is commonly used in various applications, including stormwater management, wastewater treatment plants, and agricultural drainage systems.

Benefits of Submerged Pipe Outlet:
- Dissipates energy: Submerged pipe outlets are designed to dissipate the energy of the flowing water, preventing erosion and scouring of the receiving water body. The submerged discharge helps to distribute the water evenly and reduce its velocity before it enters the receiving water body.
- Reduces turbulence: The submerged discharge reduces the turbulence of the outflow, minimizing the potential for erosion and sedimentation in the receiving water body.
- Enhances water quality: By submerging the pipe outlet, the discharged water is mixed with the receiving water body, allowing for better dilution and dispersion of pollutants. This helps to improve the overall water quality.
- Aesthetically pleasing: Submerged pipe outlets are often preferred due to their aesthetic appeal. The submerged discharge is less visually intrusive compared to above-water discharge structures.
- Cost-effective: Submerged pipe outlets are typically more cost-effective compared to other outlet structures, such as culverts or weirs. They require less construction materials and are easier to install and maintain.

In conclusion, a submerged pipe outlet is an example of a non-modular outlet used in hydraulic engineering. It offers several advantages, including energy dissipation, reduced turbulence, improved water quality, aesthetic appeal, and cost-effectiveness.