New Features:

HMS 4.10

  • Frequency Analysis Compute
  • Interpolated Meteorology
  • Snow Migration
  • Meteorologic Model Restructure
  • Cached Meteorology
  • Meteorologic Grid Time Shift
  • Frequency Storm Enhancements
  • Hypothetical Storm Computed Depth Area Checks
  • Legend, Scale Bar, and North Arrow
  • Time Series Plot Enhancements
  • Display Minimum and Maximum Spatial Results
  • Export Spatial Results
  • Brune Trap Efficiency Method
  • Dynamic Reservoir Volume Reduction Method
  • Simplex Optimization Improvements
  • Resume Differential Evolution Optimization
  • Normalized Nash-Sutcliffe Efficiency Optimization Objective Function
  • Peak-Weighted Variable Power Optimization Objective Function
  • Calibration Results Map Layer for Flow and SWE
  • Global Basin Editors
  • Snowmelt Plot
  • Air Temperature Spatial Result
  • 2D Diffusion Wave Transform and 2D Sediment Transport Enhancements
  • Basin Element Area Variable Added to the Global Editor Expression Calculator
  • Units Added to Slopes in the Subbasin and Reach Characteristics Editors
  • Added Ability to Enable/Disable Messages to OS Console in Program Settings
  • Improvements added for Processing and Applying Gridded Temperature
  • Relaxed Requirement for User-Defined Pattern Hypothetical Storm Patterns to be Strictly Increasing
  • Added File Override Warning and File Saved Dialogs
  • Exposed Differential Evolution Initial Random Seed in the User Interface

More detailed information can be found here.

HMS4.9

  • Multiple Element Merge

  • Enhanced Element Split

  • Basin Reproject

  • Automated Forecast

  • Output Control

  • Generalized Meteorologic Processes

  • Basin-Meteorology Linking

  • Normalizer Utility

  • Gridded Data Processing Utilities

  • Generalized Extreme Value and Four-Parameter Kappa Distributions

  • Constant Value Error Term - Regression With Additive Error

  • Global File Reference Table

  • Default Behavior when File is Missing

  • Visual Cues for File References

  • 2D Diffusion Wave Transform Enhancements

  • Optimization using Snow Water Equivalent Time Series

  • Calibration Summary Table 

  • Spatial Results Tooltips and Time Series

  • Rename Basin Model Elements

  • Updated Raster Display Settings Editor

  • DSS Grid Record Validator

More detailed information can be found here.

Bugs Fixed:

HMS 4.10

  • No evapotranspiration computed when gridded meteorologic methods are combined with non-gridded transform

  • Negative baseflows would sometimes be generated with linear reservoir model

  • Sliver Polygons within the Subbasin Boundary would Generate Unreasonable Flow when Applying the HMR 52 Storm

  • Raster Properties Editor Minor UI Fixes

  • Hamon Evapotranspiration Method will Compute without Temperature Method

  • Initial Outflow Parameter was not Available for Kinematic Wave Routing

  • Reach Characteristics not Fully Computing after Re-delineation of an Existing Basin

  • Spatial Results would not be Displayed in Basin Models that Mix Clark and ModClark Transform Methods.

  • Calibration Results (Flow) Would Not Be Displayed if One Out of Many Subbasin Does Not Have an Observed Flow

  • Color Scales Updated to Reflect Moriasi ET. al. 2007 and 2015 Performance Evaluation Criteria

  • Illegal Character in File Path would Freeze the Program

  • Paths to Some Grid Data and Terrain Data not Updating when Renaming Project 

  • Map Did Not Display the Updated Identified Streams When the Stream Threshold Was Updated

  • Some Reservoir Element Time-Series Table Fails to Open

  • Non-SHG Albers gridded precipitation compute fail

  • Rename Project Drops Non-HEC-HMS files Located in the Project Directory

  • Negative flows computed when Diversion has no Downstream Element

  • Animation Framerate Did Not Change When Saved

  • Muskingum-Cunge Routing on Second Pass through Stream Network

  • Kinematic Wave Routing

  • Kinematic Wave Routing and Sediment Calculations

  • Failure to Abort Compute when Gridded Hamon ET Encountered Missing Temperature Data

  • Meteorology Model Component Editor Basins Tab Did Not Respond to Method Selection

  • Import Georeferenced Elements could cause HEC-HMS to crash

  • Spatial Results Fail to Update when Computing to Point

  • Draw Properties for Shapefiles Not Saving Correctly

  • 2D Diffusion Wave and Gridded Loss Methods

  • Failure to Update all Subbasins when Changing Discretization Method from File-Specified to Structured

  • Failure to Compute Downstream Elements when Computing to a Computation Point

  • Gridded Temperature with non-Gridded Hamon ET

  • Undefined NoData Value in the Base Elevation Raster

  • Area Reduction Factor Paired Data Incorrect Unit Conversion

  • Special Characters in Meteorologic Model Name 

  • Dynamic Canopy With a ModClark Subbasin

  • Paired Data Values Changing

More detailed information can be found here.

HMS 4.9

  • Subbasin and Reach Characteristics Not Sorted Correctly

  • Outflow for Normal Depth Reach Routing Method Equal to Zero

  • Flow Rate Threshold value in Debris Yield Methods

  • No-Data Value Dropped When Computing A Reconditioned Terrain

  • Using the Terrain Reconditioning Tool on a Basin Model Name that Contains Hyphens

  • Observed Stage Time Series

  • Standard Report Unable to Generate Report for Depth Area Simulations

  • Subbasin latitude and longitude assignment after delineation

  • Temperature Index Snowmelt Spatial Results

  • Univariate Search Parameter Value Unit Conversions

  • CAVI/HEC-RTS Annual Pattern Paired Data Issue

  • Gridded Curve Number Loss Method

  • Standard Report Missing Subbasins

  • The Percent Impervious Area Adjustment was Applied Twice to Losses Sent to the Linear Reservoir Baseflow Method

  • Selecting a New Downstream Connection

More detailed information can be found here.