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Object Types
Objects and Methods
Object Types
The workspace contains the objects from which the model is constructed. Each object represents a physical feature of the river basin. Objects of the same type are customized by choosing methods and specifying data. There are two main classes of objects; simple objects and aggregate objects. A simple object represents a single physical feature of a river basin while an aggregate object represents multiple features of the same type. For example, an aggregate reach represents multiple reaches which may have different characteristics. Table 1.1 summarizes the object types available in RiverWare.
 
Table 1.1   
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Object and Description
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Storage Reservoir
A reservoir with Release and spillways and no hydropower facilities. Storage is a function of Pool Elevation as defined by an Elevation-Volume Table.
Level Power Reservoir
A reservoir with a hydropower plant (Turbine Release) and spillways. Storage is a function of Pool Elevation as defined by an Elevation-Volume Table.
Slope Power Reservoir
A reservoir with hydropower facilities and spillways. Storage is a combination of level storage and wedge storage. Wedge storage is defined by a table which relates headwater elevation and Inflow to a water surface profile.
Pumped Storage
A reservoir which has reversible pump-turbines. The turbines may generate or pump at each timestep. Storage is a function of Pool Elevation as defined by an Elevation-Volume Table.
Reach
A river section which routes water using one of many possible routing algorithms. Reaches may lose water to a Diversion and gain water from Return Flow. Reaches can also have side inflows, gains, and/or losses.
Aggregate Reach
An aggregate object which contains one or more Reach objects.
Confluence
A flow junction with two Inflows and a single Outflow.
Bifurcation
A flow junction with a single Inflow and two Outflows.
Control Point
An object used to regulate upstream reservoirs so that channel capacity at the control point is not violated.
Inline Power
An object used to model power production on a stretch of reach with no storage (run of river power production).
Canal
A bi-directional conveyance channel which delivers water by gravity between two Reservoirs.
Pipeline
An object that models flow in a pipeline between two objects.
Pipe Junction
An object used with pressurized flow to split flows similar to a bifurcation or bring flows together similar to a confluence.
Inline Pump
An object used to model a booster pump station. It controls solution direction, calculates added head and calculates the power consumed.
Aggregate Distribution Canal
An aggregate object which serves to route Diversion Requests from a Water User upstream to a Diversion object. It also routes flow from the Diversion object down to the Water Users. The Aggregate Distribution Canal contains Distribution Canal element object. See “User Methods” for descriptions of their functionality.
Aggregate Diversion Site
An aggregate object which contains zero or more Water Users. It diverts water from a Reach or a Reservoir. The Water User elements consume water and return excess flow to the system.
Diversion Object
An object which diverts water from a Reservoir or Reach. The amount of water which may be diverted is based on water surface elevation, pumping parameters, or available water.
Water User
An object that diverts water from a Reach or a Reservoir, consumes water, and then returns excess flow to the system.
Ground Water Storage
An underground storage reservoir which receives Inflow from Water User Return Flow or Reach seepage and can return water to the system.
Aquifer
A deep, fully saturated, often confined groundwater system. This object can solve at the run timestep or a user-selectable larger computational timestep.
Stream Gage
An object used to represent stream gage location. It shows the discharge data at a particular location in a model.
Power Plant Diversion
An object which models the diversion and consumption of water by a Power Plant, often for cooling.The Power Plant Diversion is an aggregate object that contains Generator element objects. See User Methods for descriptions of their functionality.
Thermal Object
An object which models the economics of the thermal power system and the thermal replacement value of the hydropower.
Data Object
A container for custom slots and user defined data that is not appropriate on a simulation object.
 
Revised: 06/03/2019