I was always under the impression, for highway drainage analysis, that the sheet flow length is equal to the distance from the high point to the first inlet. In some cases for existing drainage systems, that length can approach 300 feet. Now that I am reading the posts in this thread I think I...
I began working in 1998 with a small private consulting company in the wastewater industry. The job was great; I got the opportunity to do real-world design on my own, and had it checked by a very good PE. It was a great learning experience, but life led me back home where I began working for...
You might also want to check out www.archoneng.com. They have a helpful demo called Drainage Runoff and Flow Design, version 5.2 that I occasionally use. It has four modules: Runoff Calculator, Channel Capacity Calculator, Culvert Capacity Calculator, and Storm Drain Inlets and Grates...
