Methods: Two - Dimensional Model
Creating a 2 - dimensional model of the flow in this section of the Yahara River allows us to run a model of unsteady flow, and simulate the flow in this channel during a flood event, such as the flood from August 2018.
We defined a 2-dimensional flow area to compute the model within. Using the same elevation data from the 1-dimensional model, we created a mesh of the geometry to be analyzed.
Using the same bank locations, flood plains, bridges, and cross sections as before, we defined boundary conditions for the flow area. For flow boundary conditions, we used flow data from a river gauge on this section of the river.
We obtained flow data from a USGS stream gauge located at East Main Street. We ran the unsteady flow model with flow data from August 20 - 26, 2018 to recreate the 2018 flood that greatly impacted this area.