PDF Download PDF Download page Spring 2026. Current page Include child pages All pages Spring 2026 In This Issue Director's Comments 2026 Advancing Hydrologic Modeling with Machine Learning Methods: From Parameter Estimation to Forecasting CWMS Value Added Sunset for HEC-DSS Version 6 HEC-ResSim Version 4.0 - A Modern ResSim HEC-HMS Version 4.13 New Two-Dimensional (2D) Bridge Scour Tool in HEC-RAS Getting River Bends Right: 2D Secondary Flows in HEC-RAS ×