Archive of hydrologic and hydraulic models used in the simulation of hydraulic characteristics of Caulks Creek, Wildwood, Missouri

Substantial incision and widening of Caulks Creek within the City of Wildwood, Missouri, in western St. Louis County, poses a threat to stormwater and transportation infrastructure along with effects to residential and recreational property.  Hydrologic and hydraulic models were used to estimate probabilistic streamflows and characterize and assess spatial and temporal changes in erosion factors in a 5.4-mile reach of the Caulks Creek channel.  A hydrologic model was developed using the Hydrologic Engineering Center Hydrologic Modeling System (HEC-HMS) to assess existing and future (2050, 2099), climate-based changes in precipitation and associated changes in peak flows, volumes, and timing of peaks.  Simulations were made for 2-, 5-, 10-, 25-, 50-, and 100-year recurrence interval precipitation inputs with 6- and 24-hour durations under "normal" and "wet" antecedent response conditions.  In addition, the effects of current and potential future reservoir storage on peak flows also were assessed using the HEC-HMS model.  Streamflow hydrographs from the HEC-HMS simulations were input to a Hydrologic Engineering Center River Analysis System (HEC-RAS) hydraulic model to determine water-surface profiles, water depths, velocities, shear stress, and stream power.