Sorry, what is the "fps" that you are asking about? Are you asking what the flow rate would be for a water channel that has a drop of 2" over a 40 foot length? If so, the answer is very small -- hopefully you are not trying to generate any useful energy out of this flow...John1397 said:
A culvert is a structure that is designed to allow water to flow under a road, railway, or other obstruction. It helps to prevent flooding and erosion by directing the water to a designated outlet.
The length of a culvert plays a crucial role in its performance. A longer culvert can handle more water flow, but it also increases the potential for clogging and maintenance issues. A shorter culvert may be more efficient, but it may not be able to handle large volumes of water.
The size of a culvert is determined by the expected water flow, the topography of the area, and the materials used to construct the culvert. Other factors such as the surrounding land use and potential for debris buildup should also be considered.
The drop in a culvert, also known as the slope or gradient, affects the speed and volume of water flow. A steeper drop will result in faster water flow, while a gentler slope will slow down the water. It is important to consider the drop when designing a culvert to ensure proper water flow and prevent erosion.
The recommended drop for a culvert varies depending on the specific project and location. In general, a drop of 1% to 5% is recommended for culverts to prevent clogging and maintain proper water flow. It is important to consult with a professional engineer to determine the best drop for a specific culvert design.
