I'm working on a project that has an existing pond on the property. I delineated the drainage basin contributing stormwater runoff to the existing pond. My question is: How should I determine the flow path for time of concentration calculations. I'm using the LAG method. I have two options...
1. To generate a floodway model you will need to do part 2 below first. After you have all the models built you can begin with using method 4 using 1' as a target increase. Then you can use method 1 to refine the floodway delineation.
2. The first thing you need to do is obtain H&H data...
I have had several sites with this same scenerio here recently. My approach is as follows:
Step 1: Determine the time to peak for your site at the confluence with the stream. For small basins using the SCS method this is typically around 12 hours.
Step 2: Determine the time to peak of the...