Zumbro Hydrologic Simulation Program FORTRAN (HSPF) Model Refresh and Scenario Simulations

In previous phases of work, a Hydrologic Simulation Program FORTRAN (HSPF) model of the Zumbro River Watershed was developed to simulate hydrology and water quality for the 1995-2009 simulation period (Phase I), applied to evaluate various management scenarios for reducing sediment and nutrient loading (Phase II), and used to develop Total Maximum Daily Loads (TMDLs) for impaired stream segments and inform development of a nutrient TMDL for Rice Lake (Phase III). The current phase of this project (Phase IV) will refine the existing simulation period through 2018 and update the hydrology and water quality calibration, based on new data and information. The model will also be applied to evaluate management scenarios, building from scenarios constructed during previous phases of work.