Model Paramenters and Quantile Hydrographs

This spreadsheet reports HEC-RAS model parameters and hydrologic data for 2D hydraulic simulations of the four study reaches described in the associated publication. Model parameters include the energy grade slope for distributing flow at the upstream boundary and normal depth friction slope. Hydrologic data include 5 hydrographs per study reach. The hydrographs represent a range of low to high magnitude flooding events based on the historical instantaneous discharge records. To develop the hydrographs, first an aggregate flood event series was extracted by identifying likely overbank flows from the instantaneous discharge record for each study reach. Then, peak discharges during each flood event were temporally aligned. Finally, the 10th, 25th, 50th, 75th, and 90th quantile discharges were computed for each time step in the aggregate series and used to generate stylized quantile hydrographs reported here.