About WHI WEATHER GENERATOR...

One-dimensional groundwater flow and contaminant transport in the unsaturated zone.

The WHI Weather Generator is used to create the atmospheric boundary condition data required by the Visual HELP model and the SESOIL model.

The WHI Weather Generator is a built-in component for generating statistically reliable weather for virtually any location in the world for periods of up to 100 years. This powerful tool utilizes a database of more than 3000 international weather stations containing historical climatalogical data for each location. 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 WHI Weather Generator utilizes the weather generation algorithm developed by the Agricultural Research Service of the U.S. Department of Agriculture (USDA). The WHI Weather Generator also includes the weather station database compiled by USDA containing statistically accurate summaries of the required climatalogical data for major weather stations located within the U.S.

The following section describes the steps required to generate weather data for your project location.

Selecting the Project 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 (you will be asked to select which weather station to use). The project database contains a list of locations from previous projects or you can generate a new location.

If you choose to select a new location for the project, the following window will appear. If you know the Longitude and Latitude of the project location, you can enter it and add the new location to the database. Alternatively, you can use the GIS component to graphically locate the project location (city). As shown in the figure below, you can select from a list of continental GIS maps to use when selecting the project location.

Once you select the appropriate GIS map, press the [Select Location ...] button to load the GIS map. In this example, we will use the US and Canada map to select a project location in California.

Zoom in to desired location....

Click the Cross-Hairs icon and then click on the desired location (Sacramento). The following pop-up window will appear listing the five nearest Meteo Stations.

Select the desired station and then press [OK]. The location description and coordinate information will automatically be completed as shown in the following screen capture.

If this information is correct, press the [Add] button to add this data to the list of project locations. This project location and weather station information will be used to help generate the weather data for either the Visual HELP model or the SESOIL model.

Generating Weather Data

To generate the weather data for a Visual HELP or SESOIL model, simply click the Shining Sun icon on the upper menu bar to launch the WHI Weather Generator. Once the WHI Weather Generator is launched the following window will appear.

This window displays the project location, the selected Meteo Station for the project, and the simulation length.

This window can be used to view and modify the default climatalogical settings for the project location. The Precipitation/Temperature tab can be used to view/modify the default settings for the monthly average precipitation and temperature values, while the Database tab can be used to view/modify all of the detailed climatalogical parameters.

Once the weather data has been generated, you can display the simulated weather data using a built-in graphical component as shown below.

Once the weather data has been generated, it can be used as required input data for either the Visual HELP model or the SESOIL model.

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