Hydrology – 12D Wiki

Time of Concentration Calculator

Time of Concentration is the time it takes for water to flow to its outlet from the farthest point on a catchment. 12d Model will calculate the Time of Concentration for a catchment based on the 'Finished Surface', and the flow lines that you draft. There are three steps: Draft the flow line that shows [...]

Initial and Continuing Losses

Loss Models are methods that Hydrologists use to calculate how much of the rainfall on a catchment runs off, and how much is 'lost'. Hydraulic structures (pits, pipes, culverts and channels) need only to be designed for the water that runs off the catchment (not the total amount that falls onto the catchment). The [...]