• USACE‑SWD Modeling Techniques
• Conceptual Overview
  • About This Document
  • Modeling Steps
    • Develop Simulation Model
    • Implement Policies Using Rulebased Simulation
    • Run Using Unregulated Conditions
    • View and Analyze Results
    • Convert to Yield Study, If Desired
  • Model Components
  • Ruleset and Policy
    • Surcharge Release Rules
    • Flood Control Minimum Release
    • Regulation Discharge Rule
    • Flood Control Release Rule
    • Low-flow Releases
    • Reservoir Diversion
    • Hydropower
    • Fish Release
  • Rule-Simulation Interaction for Each Timestep
• Modeling Physical Processes
  • Developing the Simulation Model
  • Model Building Steps
    • Set Timestep and Start Date
    • Set Number of Post-run Dispatch Timesteps
    • Define Display Units Through a Unit Scheme
    • Add Objects to the Workspace
    • Select Methods on Objects
    • Link Slots
    • Input Data
    • Run and View
  • Reservoir Objects
    • Required Inputs
    • Power Methods
    • Tailwater Methods
    • Spill Methods and Required Data
      • Spill Calculation Category
      • Spillway and Release Modeling
      • Order of Spillway and Release Structures Used in RiverWare
    • Inflows
      • Reservoir Inflow and Mass Balance Data
      • Forecast Inflow—Uncontrolled Area Flow
    • Seepage
    • Other Possible User Methods
  • Reach Objects
    • Routing
    • Solve Downstream Only
    • Transit Losses
  • Confluence Objects
  • Control Point Objects
    • Local Inflows and Uncontrolled Area Flow
  • Water User Objects
  • Data Objects and Custom Slots
  • Forecasting Incremental Local Inflows From Cumulative Flows
    • User Implementation
    • Methods
  • Initialization for Routing Methods
    • Slots Requiring Presimulation Values
    • Presimulation Values
    • Required Number of Presimulation Timesteps
    • Methods
    • Using Initialization Methods
      • Create an Initialization Subbasin
      • Define Initial Values as Necessary
      • Deactivate or Remove Initialization Rules
      • Other Suggested Changes
  • Alternative Routing Coefficients Methods
    • User Implementation
    • Methods
    • Alternative Routing and Flood Control
    • Post-run Dispatching
      • Local Inflow Forecasting Algorithms
      • Data Filled for Each Object
      • Data That Must be Input
      • Data Currently Input but Can be Set by Alternative Method Selections
• Modeling Operations
  • Implementing Operating Policies Using Rulebased Simulation
  • Overview of Use of Rulebased Simulation
  • Ruleset Overview
    • Creating a New Ruleset
    • Agenda Order
    • Order of Policies
    • Execution Constraints to Execute Rule Once per Timestep
    • Types of Rules
      • Assigning Values Using Lists of Lists
      • Setting Flags
    • Use of Computational Subbasin
      • Create a Computational Subbasin
      • Adding Objects to Subbasin
  • Surcharge
    • Model Setup
    • RPL Implementation
    • Description of Logic
  • Flood Control Minimum Release
    • RPL Implementation
  • Regulation Discharge
    • Model Setup—Control Point Methods
    • RPL Implementation
  • Flood Control
    • Model Setup
      • Reservoir Methods
      • Control Point Methods
        • Required Input Data
        • Key Control Point Balancing
      • Computational Subbasin Methods
        • Configure Subbasin for Flood Control
        • Propagate Values
        • Verifying and Enabling Subbasin
    • RPL Implementation
    • FloodControl Function—Detailed Description of Logic
  • Low-flow Releases
    • Model Setup
      • Control Point Methods
      • Reservoir Methods
      • Computational Subbasin Methods
    • RPL Implementation
    • MeetLowFlowRequirements Function
    • Setup to Avoid Routing Low-flow Releases
      • Creation of Secondary Flow Paths
      • Method Selection on Objects
      • Rules to Divert to No Lag Secondary Flow Paths
  • Reservoir Diversions
    • Model Setup
      • Reservoir Methods
      • Diversion Object Methods
      • Water User Methods
      • Computational Subbasin Methods
      • Linking Setup
    • RPL Implementation
    • ComputeReservoirDiversions Function—Detailed Description of Logic
  • Hydropower
    • Model Setup
      • Power Reservoir Methods
      • Control Point Methods
      • Computational Subbasin Methods
    • RPL Implementation
    • HydropowerRelease Function—Detailed Description of Logic
  • Fish Release
    • Accounting Setup on Reservoir and Control Point Objects
    • RPL Implementation
  • Direct from Reach Diversions
    • Model Setup
      • Reach Methods
      • Water User and/or Diversion Object Methods
• Modeling Unregulated Conditions
  • About Unregulated Flows
  • Functionality to Remove the Effect of a Reservoir
  • Model Run Mechanism
    • Computation of Flows for a Fully Unregulated System
    • Computation of Flows for a Partially Unregulated System
  • Information on Other Objects When Reservoirs Are Disabled
    • Diversions Based on Disabled Reservoirs
    • Seepage Methods
    • Hydropower Releases Downstream Search
    • Low-flow Requirements Based on Disabled Reservoirs
  • Benefits Computations
  • Routing Holdouts
    • Modeling Components
      • Subbasins
      • Custom Slots
      • Object Attributes to define Object relationships
      • Iteration Data Object
      • Scripts
      • Iterative MRM Rules Set
      • Iterative MRM Configuration
      • Database DMI and Name map
    • How it all Works
    • Tips for Adding a Reservoir or Control Point
• Computing Reservoir Yield
  • About Reservoir Yield Studies
  • Steps
  • Viewing Results
  • Algorithms
    • Bisection
    • Heuristic A
    • Heuristic B
    • Choosing a Method
• Miscellaneous Topics
  • Analysis and Output Tools
    • Plotting
    • Statistical Slots and Probability Plots
    • SCT
    • Expression Slots
    • Model Run Analysis—Special Results Details Dialog
      • Accessing and Navigation
      • Layout and Overview
        • Related Slots
        • Reason For Limiting Release Table
    • Comparing to SUPER
      • Set Storage Rules
      • Testing Strategies
        • Testing Surcharge Release
        • Testing Regulation Discharge
        • Testing Flood Control Results
        • Testing of Low-flow Releases, Reservoir Diversions, and Hydropower Releases
  • DMIs to Import and Export Data
    • Database DMI-DSS Interface
    • DMI Invocations and Clearing Input DMI Values
  • Performance Tips and Information
    • User Tips
    • Internal RiverWare Changes
      • No Dispatching Beyond Forecast Period
      • No Setting of Values Beyond Forecast Period in Step Response Routing
      • Cache Routing Vectors
      • Custom Downstream Dispatch Order

Technical Documentation Version 9.4

Performance Tips and Information