# Hydraulic Radius Pipe

I have included a table of the hydraulic radius, flow are and wetted perimeter at the bottom of the page. Hydraulic Elements Chart for Pipe Flow using New Definition of Hydraulic Radius by Tsugio Fukuchi, (Sr. Engr. Here we can calculate for Hydraulic Radius. r = pipe or duct radius (m, ft) As we could expect the hydraulic diameter of a standard circular tube or duct is two times the radius. It is a function of the shape of the pipe, channel, or river in which the water is flowing. As a result there is no relatively simple equation for hydraulic radius in terms of flow depth and pipe diameter. Here we can calculate for Hydraulic Radius.

**Hydraulic Radius Pipe**

- • Hydraulic radius will have units of length.
- Spreadsheet templates can be downloaded from this article to calculate hydraulic radius (and other parameters) for partially full pipe flow.
- This equation is different if the pipe is more than half full.
- 2 arccos roughness coefficient, A = area of flow, R = hydraulic radius and S = slope of the pipe.
- The hydraulic radius can often be related directly to the geometric properties of the channel.
- Here we can calculate for Hydraulic Radius.

*More information about Hydraulic Radius Pipe on the site: http://imgusr.tradekey.com*

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