Current Conditions

Using real-time data available through infosyahara.org we were able to calibrate our manning's n value to obtain realistic flow rate values. Using detailed cross-sectional data, along with current water level and flow rate data, we were able to run the HEC-RAS model to analyze our choking locations, along with the proposed mitigation solutions. The current conditions that we used were:

Channel Width: Minimum 65’ Wide (Railroad Crossing), Maximum 3000’ wide (Mud Lake)
Monona Water Level = 845.6’
Waubesa Water Level = 845.2’
Flow Rate = 440 CFS
Winter Months n = 0.025
Summer Months n = 0.06
Fall/Spring n = 0.035

Below are water surface profile plots generated for the bridge at Bridge Rd and the railroad trestle located at the outlet of Mud Lake. We noticed significant choking occurring at these constriction points when testing the model with a flow rate value of 800 CFS. Going forward in the study, we next analyzed possible mitigation solutions at these two locations.