6.1 Overview

This chapter describes model construction specific to the 3D hydrodynamic (3D HD) simulation class.

The 3D HD simulation class extends the 2D hydrodynamic simulation class described in Chapter 5. This chapter assumes familiarity with the 2D HD model construction process and follows the standard model construction structure defined in that chapter. Content in this chapter documents only model classes and configurations that are new to 3D HD simulations or are extensions of model classes previously introduced in the 2D HD simulation class.

Typical 3D HD simulation class use cases are hydrodynamic applications that do not require salinity, temperature or density effects such as the following.

• Hydraulic structure design
• Rudimentary scour assessment using bed shear stress outputs (not sediment transport)

This chapter sets up the fundamental 3D model components for 3D advection dispersion, 3D sediment transport, 3D water quality or 3D particle tracking simulations. These components are extended in the following chapters.