HEC-HMS Users Manual
HEC-HMS Users Manual
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HEC-HMS Users Manual
Welcome to HEC-HMS.
News
v.4.4.0 Release Notes
February 26, 2020
Topics
Preface
Introduction
Scope
History
Capabilities
Limitations
References
Installing and Running the Program
Operating System Requirements
Hardware Requirements and Recommendations
Installation
Command Line Operation
Running the Program
Managing Memory Allocation
Additional Resources
Overview
Program Screen
Program Settings
Data Conventions
Application Steps
References: Overview
Projects and Control Specifications
Projects
Directories and Files
Control Specifications
Importing HEC-1 Files
References: Projects and Control Specifications
Shared Component Data
Time-Series Data
Paired Data
Grid Data
Terrain Data
References: Shared Component Data
Watershed Physical Description
Basin Models
Basin Model Properties
Basin Model Map
Hydrologic Elements
Flow Network
Zones
Computation Points
References: Watershed Physical Description
Geographic Information
GIS Menu
Subbasin Elements
Selecting a Canopy Method
Snowmelt
Selecting a Surface Method
Selecting a Loss Method
Selecting a Transform Method
Selecting a Baseflow Method
References: Subbasin Elements
Reach Elements
Selecting a Reach Routing Method
Selecting a Loss-Gain Method
References: Reach Elements
Reservoir Elements
Selecting a Reservoir Routing Method
Outflow Curve Routing
Specified Release Routing
Outflow Structures Routing
Source, Junction, Diversion, and Sink Elements
Source
Junction
Diversion
Sink
Meteorology Description
Meteorologic Models
Shortwave Radiation
Longwave Radiation
Precipitation
Evapotranspiration
References: Meteorology Description
Hydrologic Simulation
Simulation Runs
Computing Results for a Run
Viewing Results for the Current Run
Viewing Results for Other Runs
Model Optimization
Optimization Trials
Computing Results for a Trial
Viewing Results for the Current Trial
Viewing Results for Other Trials
Forecasting Streamflow
Forecast Alternatives
Adjusting Parameters for the Forecast
Subbasin Baseflow Initialization
Reach Outflow Initialization
Reservoir Pool Initialization and Reset
Blending Computed Flow with Observed Flow
Computing Results for an Alternative
Viewing Results for the Current Alternative
Viewing Results for Other Alternatives
Viewing Results for CWMS Alternatives
Depth-Area Reduction
Depth-Area Analyses
Computing Results for an Analysis: Depth-Area Reduction
Viewing Results for the Current Analysis
Viewing Results for Other Analyses
Assessing Model Uncertainty
Uncertainty Analyses
Computing Results for an Uncertainty Analysis
Viewing Results for an Analysis
Erosion and Sediment Transport
Watershed Sediment Properties
Subbasin Sediment
Reach Sediment
Reservoir Sediment
Source Sediment
Junction Sediment
Diversion Sediment
Sink Sediment
Viewing Erosion and Sediment Results
References: Erosion and Sediment Transport
Data Storage in HEC-DSS
Descriptors
Grid Cell File Format
HEC-HMS and HEC-1 Differences
Recession Baseflow
Clark Unit Hydrograph
Muskingum Cunge Routing
Kinematic Wave Routing
Ogee Spillway Flow
Green and Ampt Infiltration
Terms and Conditions of Use
Release Notes
v.4.4.0 Release Notes