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MAIN FEATURES
About The HELP Model
The HELP program was developed by the U.S. Army Engineer Waterways Experiment Station (WES), Vicksburg, MS for the U.S. Environmental Protection Agency (EPA), Risk Reduction Engineering Laboratory. The primary purpose of the model is to assist in the comparison of landfill design alternatives as judged by their water balances.
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Easy-To-Use |
The familiar design and functionality of the interface makes it extremely easy to learn and facilitates rapid model development using any of the available models. |
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New Project Wizard |
Creating a model is easy with a step-by-step wizard to guide you through the process. |
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Project Management |
The project-based data management system liberates the user from handling of numerous files for separate projects. |
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Customizable Units |
Choose from pre-defined unit templates or create your own unit template for all model parameters. |
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Input Data |
The Project Tree allows you to quickly view and modify the profile data structure for each model profile, or to easily duplicate the model data files for performing multiple simulations for sensitivity analyses. |
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Model Profile View |
The Profile View provides a graphical display of the geometry, dimensions, layer structure and stratigraphy of the model profile. |
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Database Links |
A customizable database of soil parameters is linked to the various input forms for automatic entry of selected property values. |
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SWS Weather Generator |
The built-in SWS Weather Generator generates up to 100 years of statistically reliable weather data to use as input. |
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Seamless Integration |
Create the model profile(s), run the simulation(s), visualize the results, and create the report documents; all in the same graphical modeling environment. |
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Presentation of Results |
Visual HELP comes with a powerful graphical component for visualizing the simulation results in graphical or tabular format. |
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Automatic Report Generator |
Create a rich text document with tabulated input data, profile graphics, and a display of results. |
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Teamwork |
Visual HELP supports teamwork environments so that project files can be run over a networked system. |
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Data Sharing |
Export recharge data (infiltration rates) from Visual HELP to use as recharge boundary condition data in saturated zone groundwater models such as Visual MODFLOW. |
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Tutorials |
Visual HELP comes with two step-by-step tutorials covering one example of modeling landfill hydrology and one example of estimating groundwater recharge at a site. |
The interface is divided into three separate views, the Project Data Tree, the Profile View, and the Output View. When you open or create a project, you will be able to seamlessly switch between these views to build or modify the landfill design and model input parameters, run the simulations, and display results.
| The Project Tree View |
Displays the Visual HELP project you are working on, the names of each model profile, and each layer in the active model profile.
Acts as a project manager allowing you to easily create and manage multiple model profiles within the same Visual HELP project. All model profiles for a project are saved in the same database for easy access and handling of the model data and simulation results.
Allows you to easily add, delete, edit layer properties and group multiple layers using standard right mouse button operations. |
| The Profile View |
The Profile View provides a graphical representation of the landfill profile and allows you to graphically modify the layer geometry using standard 'point-and-click' and 'drag-and-drop' operations.
Add, delete, split or insert layers, or edit layer properties from the Profile View. |
| The Output View |
Allows you to display all of the generated weather data and modeling results using a comprehensive selection of graphical presentation formats. The display of data can be modified to choose daily, weekly, monthly or yearly results for the following simulated parameters:
- Precipitation, runoff and evapotranspiration
- Lateral drainage collected from selected model layers
- Percolation or leakance through selected model layers
- Average head accumulated on selected model layers
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Designing/Modifying a Model Profile
From the Project Tree View
Once the project information has been entered, your project will appear in the Project Tree View. This tree view allows you to have easy access to multiple projects, multiple profiles within a single project, and all data associated with each profile.
The default EPA profile contains a landfill layer configuration with typical properties that are recommended by the EPA as a starting point for your profile. Each layer type has a specific set of properties associated with it which can be accessed from the Project Tree as shown for the 'coarse sand' layer in the figure.
The Profile View
The Profile View allows you to add and delete layers, and view and edit the properties associated with each layer using the right mouse button. When you insert or delete a layer, you have the option of either fixing the top elevation or the bottom elevation//n of the profile.
Modifying Layer Properties
Visual HELP makes it simple to change the properties of different natural and artificial materials used in landfill design. Simply double-click on one of the layer materials listed in the Project Tree and a window appears displays all of the properties of the selected layer.
Changing Layer Group Settings
Visual HELP provides you with the tools to group adjacent layers together and modify the function and/or common properties of these layers in a single operation. This is very convenient for assigning properties (e.g.'slope') to groups of layers that serve a single purpose (such as a landfill cap).
General Project Information
Each new Visual HELP project requires you to enter a unique project name, select the units (metric or english), and identify the author and the client for the project. A Project Description field also lets you enter a detailed description for tracking changes or for future references.
Selecting the Model Location
When you create a new model profile using either Visual HELP or SESOIL, you will be prompted to select a project location, including the longitude and latitude of the project location (approximate). The project location information is stored for general project description information and it is also used to locate the five nearest weather stations.
Alternatively, you can use the GIS component to graphically locate the project location (city). You can select from a list of continental GIS maps to use when selecting the
project location.
Selecting the Model Units
Select the Unit Template to apply for both the input parameters and the Output of modeling results. The Unit Template describes the unit settings for each parameter used in the
model. The default unit template is Customary (American units) but it can easily be changed to another pre-set unit template such as Metric, or to a model-specific unit template
for SESOIL and VLEACH.
Create your own unit template customized to fit your input data requirements.
The SWS Weather Generator is used to create the atmospheric boundary condition data required by the Visual HELP model.
This database is fully customizable allowing, the user to modify existing data or create new records to accommodate site specific weather conditions. Customized weather data can be entered manually, or imported from standard NOAA format.
Note: The SWS Weather Generator utilizes the weather generation algorithm developed by the Agricultural Research Service of the U.S. Department of Agriculture (USDA). The SWS
Weather Generator also includes the weather station database compiled by USDA containing statistically accurate summaries of the required climatological data for major weather
stations located within the U.S..
DISPLAYING & DOCUMENTING MODELING RESULTS
The Visual HELP Output View automatically reads the results files and provides a comprehensive selection of graphical formats for displaying the results in a variety of graphical formats.
Time Plot Settings
Visual HELP gives you the ability to report the data for all simulated variables daily, monthly, or annual values. The hydrological results generated by the HELP model include
time series information such as:
The Result Category list contains six different data types corresponding to the six branches of the HELP Model Output Tree. Each branch of the tree has specific data attributes:
- Daily Output plots the data for each simulated parameter for each day of a selected year(s) (units of length)
- Monthly Output plots data for each simulated parameter for each month of a selected year(s) (units of length)
- Annual Total plots the annual summary for each simulated parameter for each year of the simulation (units of rate, volume or percentage)
- Accumulated plots the accumulated results for each simulated parameter for each year of the simulation
- Final water storage in Layers at the end of the simulation (units of length)
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Tables - provides a summary of the selected data
Visual HELP provides a comprehensive selection of data plotting formats to represent these results using most common plotting techniques including:
- Multi-axes Line Graphs
- Bar charts (horizontal or vertical, individual or stacked)
- Area Graphs and Pie Charts
Visual HELP allows you to modify and customize virtually any characteristic of your plots including Windows true type fonts, background colors, axes scaling, symbol types and
colors, legend location, etc.
Visual HELP also provides a built-in text editor for viewing and interpreting the results files generated by the HELP model.
Automatic Report Generator
Visual HELP comes with a built-in report generator that produces a rich text document file containing a summary of the model profile and input parameters. The report is
generated in a feature-rich document processing application that allows you to easily customize the document to include selected plots and/or tables from the modeling results.
Visual Help contains detailed on-line help and is accompanied by a comprehensive user's manual containing easy-to-follow instructions and a step-by-step tutorial. Free technical
support is provided by phone, fax or e-mail.
- PC Pentium
- 32 Mb RAM
- 25 Mb free disk space
- VGA display and mouse
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Windows 2000/XP
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Advanced contaminant transport & groundwater modeling software. 
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