HEC-ResSim 4.0 User's Manual

HEC-ResSim 4.0 User's Manual

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HEC-ResSim 4.0 User's Manual

HEC-ResSim User's Manual for version 4.0 and beyond

Important Information

ResSim Modeler FAQ

November 07, 2025

HEC-ResSim 4.0 Release Notes

February 13, 2023

Topics

ResSim Modeler FAQ

HEC-ResSim 4.0 Release Notes

Integrating ResSim with CWMS and HEC-WAT

ResSim Variants

About this Manual

Document Conventions

Introduction to ResSim

ResSim Model File Structure

Basics of Opening a ResSim Model

ResSim User Interface

Watershed Setup

The Watershed Setup Module

Creating a Watershed

Adding Background Maps

Watershed Configurations

The Stream Alignment

Watershed Schematic Elements

Reservoir Networks

The Reservoir Network Module

Creating and Managing Reservoir Networks

Completing the Network Connectivity

Managing Reservoir Networks

The Reservoir Network Reports

Network Elements

Reservoir Operations

Reservoir Operations — The Basics

Reservoir Operations — The Rules

Alternative Editor

Run Control Tab

Time-Series Tab

Observed Data Tab

Global Variables Tab

Monte Carlo Tab

Yield Analysis Tab

Water Quality Tab

Running Simulations

Simulation Screen Components

Creating a Simulation

Working with Existing Simulations

Computing a Simulation

Reviewing Simulation Results

Calibrating the Model and Editing Data

Managing Simulation Data

Results Analysis

Using HEC-DSSVue in ResSim

Plotting Results

Viewing and Managing Reports

Utility Scripting in ResSim

Printing and Exporting ResSim Data

Advanced Features

Reservoir Systems

State Variables

Water Account Sets

Capacity Outage Schedules

Reservoir Decision Schedule

Projected Elevation

Global Variables

ResSim Yield Analysis Feature

Yield Analysis Summary Report

Ensemble Computing

HEC-DSS Collections

DSSVue Collection Utilities

ResSim Ensemble Alternatives

Monte Carlo Analysis

ResSim Monte Carlo Alternatives

Setting Up a Monte Carlo Alternative

Operation Support Interface

Exploring the OSI User Interface

Basic OSI Setup

Using the OSI for Reviewing Results

Using the OSI to Perform Release and Elevation Target Overrides

Using the OSI to Compute Local Inflows

ResSim Application Settings

The Options Editor

The Application Properties Dialog

Working with Map Display Layers

The Layer Selector

The Layers Tree

ResSim Default Layers

Configuring Layer Drawing Properties

Using the Color Chooser

Creating User Toolbar Buttons

Defining the Watershed Coordinate System

Removed Features

Hydrologic Engineering Center, US Army Corps of Engineers / HEC-ResSim Water Quality User's Manual

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