A One-Dimensional Hydrodynamic and Water Quality Model for a Water Transfer Project with Multihydraulic Structures

Table 2

Solution methods of hydraulic structures in two water quality models.

Items	WHYSWESS-WQ	MIKE 11
Aqueduct	Open channel flow with branches	Open channel flow
Tunnel	Open channel flow with branches	Open channel flow
Control gate	Discrete gate flow formula is coupled with discrete Saint-Venant equations. Initial water level, discharge, and process of control gate opening are provided to automatically select corresponding flow calculation formula	Discharge point, single setting; three controlling modes (, , sum ); appropriate discrete solution is coupled
Diversion	Lateral outflow, source-sink term in continuity equation	Lateral outflow, inner boundary
Culvert	According to the water level, flow contains open flow; half-pressure flow and pressure flow	Culvert module includes zero flow, upstream controlled flow, downstream controlled flow for different computational purposes. Above flow modes consists of many flow situations and equation. Discrete equations are solved with Saint-Venant equations
Inverted siphon	Discrete pressure flow equation is coupled with discrete Saint-Venant equations to solve together	As a culvert with fully submerged flow