HEC-HMS Tutorials and Guides Modeling Reservoirs in HEC-HMS Current: Modeling Reservoir Operations with HEC-HMS PDF Download PDF Download page Modeling Reservoir Operations with HEC-HMS. Current page Include child pages All pages Modeling Reservoir Operations with HEC-HMS Introduction to Modeling Reservoir Operations with HEC-HMS Specifying Releases for an HEC-HMS Reservoir Element Rule-Based Option for an HEC-HMS Reservoir Element Outflow Curve Option for an HEC-HMS Reservoir Element ×