HELP for Windows 95/NT

Complete modeling environment for the HELP model for evaluating and optimizing landfill designs



Introduction to Visual HELP
Professional Applications of Visual HELP
Visual HELP Main Features
About the Visual HELP Interface
Visual HELP Model Design Features
Generating Weather Data and Running
   the HELP Model

Visual HELP - Running the Model
Visual HELP Documentation
Visual HELP Requirements

Introduction to Visual HELP

Visual HELP for Windows 95/NT is the most advanced hydrological modeling environment available for designing landfills, predicting leachate mounding and evaluating potential leachate contamination. Visual HELP combines the latest version of the HELP model (v.3.07) with an easy-to use interface and powerful graphical features for designing the model and evaluating the modeling results. This latest version of the HELP model addresses many of the limitations and bugs of earlier versions and also includes several new analysis features.

Visual HELP's user-friendly interface and flexible data handling procedures provide you with convenient access to both the basic and advanced features of the HELP model. This completely-integrated HELP modeling environment allows the user to:

  • Graphically create several profiles representing different parts of a landfill,
  • Automatically generate statistically-reliable weather data (or create your
  • Run complex model simulations,
  • Visualize full-color, high-resolution results, and
  • Prepare graphical and document materials for your report.

For professional applications in landfill design, Visual HELP is the only software package you will ever need!

Professional Applications of Visual HELP

Landfill Applications

  • Simulate multiple landfill profiles to find the most suitable design.
  • Evaluate leachate mounding or leakage problems with current landfills.
  • Determine the effectiveness of landfill caps for reducing leachate mounding.
  • Design and optimize leachate collection systems.

Other Applications

  • Examine contamination problems resulting from mine tailings.
  • Predict rates of infiltration/aquifer recharge.

Visual HELP Main Features

  • An intuitive interface design for creating and modifying the landfill profile.
  • Click-and-drag graphical tools for modifying layer dimensions.
  • GIS tools for selecting the site location and weather station.
  • Automatic generation of statistically-accurate weather data.
  • Output results are comprehensive.

About the Visual HELP Interface

Visual HELP utilizes a very 'flat' interface structure and innovative graphical tools to give you convenient access to both the basic and advanced features of the HELP model. The result is a truly revolutionary approach to hydrological modeling that gives you more power and flexibility with your model profile than ever before. The interface is divided into three separate views, the Project Tree View, the Profile View, and the Output View. When you open or create a project in Visual HELP, 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 Visual HELP Project Tree View
The Visual HELP Project Tree View displays the project profiles you are working on, the names of each layer in the open profile, and characteristics of
each layer. The Project Tree View allows you to easily add layers, delete layers, edit layer properties, and group multiple layers using standard Windows 95/NT
right-mouse button operations.

The Visual HELP Profile View
The Visual HELP 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. The user can also add, delete or edit layer properties from the Profile View.

The Visual HELP Output View
The Visual HELP Output View allows the user to display all 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 multiple parameters.

Each view of the Visual HELP interface can be seen from the main window as shown in the above figure.

Visual HELP Model Design Features - Starting a Project

The logical structure of the Visual HELP interface facilitates a very quick learning curve that allows you to generate and modify a typical profile in just minutes. In many cases, the most difficult and time-consuming task you will have is deciding what to name the project files. The following section provides a description of the steps involved in creating a hydrologic profile model using Visual HELP's advanced model generation tools.


Visual HELP 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 a Location for your Landfill in Visual HELP
Once the project information has been established, you must enter the location of  the site and provide a description of the profile  location. This is useful for keeping track of  sites where you are simulating more than one  profile. The Longitude and Latitude of the site  location can be manually entered or  automatically generated using the latest in  GIS mapping tools (currently applicable only  for Canada and U.S. locations).


Designing a Landfill Profile in Visual HELP


From the Project Tree View
Once the project information has been entered in Visual HELP, 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.

To assist you in building your project profile, Visual HELP will load two default templates for each project containing landfill profile configurations that are recommended by the U.S. EPA. These default profile configurations  provide a good starting point to begin designing your landfill profile. Visual HELP also allows you to 'start from scratch' with a blank one-layer profile and build your own customized profile configuration.

The default U.S. EPA profiles in Visual HELP each contain a landfill layer configuration with typical properties that are recommended by the U.S. EPA as a starting point for your profile. The layer types for the default profiles are shown in the figure above. 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. Each of these properties can be easily viewed and modified by double-clicking on the property in the Project Tree View.


From the Profile View in Visual HELP
The Visual HELP Profile View (see figure to the left) provides a graphic representation of the landfill profile and allows you to graphically modify the layer geometry using standard drag-and-drop methods. The Profile View also 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 of the profile. This is particularly useful for satisfying design criteria relating to the maximum elevation/depth of the landfill.

Editing Layer Properties in Visual HELP
In addition to being able to easily add, resize and delete layers, Visual HELP makes it simple to change the properties of different natural and artificial materials used in landfill design. Each table provides a listing of all properties associated with the selected layer type.

Changing Layer Group Settings in Visual
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.

Altering Surface Runoff Settings in Visual HELP
Visual HELP supplies a complete selection of methods for calculating or manually assigning values for the surface water runoff curve number. The selection of methods includes User-Specified, User-Modified, and Model-Calculated.

Generating Weather Data and Running the HELP Model

The Weather Generator

The HELP model requires comprehensive input data consisting of daily values for precipitation, solar radiation and mean air temperature. Typically, this detailed information is difficult to obtain for a specific site so Visual HELP includes a Weather Generator that was developed by the Agricultural Research Service of the U.S. Department of Agriculture. The Weather Generator contains statistically-accurate summaries of the required climatalogical data for major weather stations located within the U.S. This information is used to generate predicted weather patterns for your site for a specified time period. Visual HELP then uses this data as input to determine the volumetric inflow of water reaching the landfill and to simulate surface runoff, evaporation, vegetation growth, transpiration, and infiltration during warm periods. Visual HELP also simulates surface storage, snowmelt, runoff and infiltration during cold periods.


Weather Station Locator in Visual HELP
Visual HELP provides the latest in GIS tools for locating and selecting the weather station that is nearest to your site (currently available only for U.S. and Canada). Simply zoom in to the area of interest and select the location of your site. Visual HELP will then prepare a summary of the five nearest weather stations that can be used to generate the weather data for your site.

Generating Meteorological Data in Visual HELP
Visual HELP provides you with a comprehensive interface for collecting, generating, viewing and modifying the meteorological input data required by the HELP model. Once you have selected the nearest weather station, you can view/edit a summary of the average monthly values for Precipitation and Evapotranspiration. In addition, you can access a database of all the weather station information used to generate the data for your site.

Viewing Generated Meteorological Data in Visual HELP
Visual HELP comes with powerful graphical tools that give you the flexibility to view the data as daily, monthly or yearly values. The following graphs are just some examples of the types of graphs typically generated for this type of analysis.


Visual HELP - Running the Model


Run Visual HELP
Running the model is a simple process that quickly and easily provides accurate simulation results.

Graphical Display Features - The Output Capabilities

The ability to visualize the simulation results is almost as important as creating the model in the first place, and Visual HELP gives you all the graphical tools you need to properly analyze and interpret the results and produce report-quality figures and summaries of data. The Visual HELP Output View automatically reads the results files and provides a comprehensive selection of graphical formats for displaying full-color results in chart format.


Visual HELP Time Plot Settings
Visual HELP gives you the power to plot data for all variables of interest in a daily, monthly or yearly format. The hydrological results generated by the HELP model include time series information such as: precipitation, evapotranspiration and runoff; lateral drainage from specific layer types; percolation/leakage through specific layer types; and average head values specific layers.

Visual HELP supports a comprehensive array of series data plotting formats to represent these results using the most common plotting techniques including: multi-axes line graphs; bar charts (horizontal or vertical, individual or stacked); and area graphs and pie charts.

Using the powerful Tee-Chart graphical components, 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 editing the simulation results files generated by the HELP model.

Visual HELP Table Results
In addition to Time Plots, you can view the data in a table format. Visual HELP picks out peak values for different hydrologic events (e.g., rainfall, runoff, snowmelt and percolation). These summaries are placed in an easy-to-read table that can be displayed on-screen with the graphical display of the time-series data.

Printing Results and Generating Reports in Visual HELP
Visual HELP prints full-color, high-resolution graphics to any printer or plotter supported by Windows 95/NT. Visual HELP also comes with a built-in report generator that allows you to manage all your graphical information and tabulated results from multiple HELP simulations.

Visual HELP Documentation

Visual HELP comes with a comprehensive user's manual containing easy-to-follow instructions and a step-by-step tutorial. Free technical support is provided by phone, fax and e-mail.

Visual Help Requirements: PC 486DX/Pentium; 16 MB RAM (32 MB recommended), 20 MB free disk space, VGA display and mouse, and Windows 95/NT.

Incredible NetworksΤελευταία Ενημέρωση 27 Ιουλίου 2004 - Last Revised on July 27, 2004
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