Short introduction to the use of PEARL General properties First tier assessments Higher tier assessments Before looking at first and higher tier assessments, we will show you some general properties of PEARL. Use the mouse to proceed to the next slide Use the Back button of your browser to stop
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Short introduction to the use of PEARL General properties First tier assessments Higher tier assessments Before looking at first and higher tier assessments,
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Short introduction tothe use of PEARL
General propertiesFirst tier assessments
Higher tier assessments
Before looking at first and higher tier assessments, we will show you some general properties of PEARL.
Use the mouse to proceed to the next slideUse the Back button of your browser to stop
PearlUser
Interface
PearlUser
Interface
Pearlmodel
Pearlmodel
XYWinXYWin
Pearldatabase
Pearldatabase
ReportReportGraphGraph
The PEARL system consists of various components as shown in the figure. As a user, you will communicate with the PEARL User Interface only.
When you start the user interface, you will always enter the main screen. From here, you can access the data, run the model and view the results.
Pearl uses a relational database for data storage. Runs are composed of building blocks at various levels.
Scenario
Location Cropcalendar
Irrigationschedule
Soilprofile
Meteostation
Localground-water
system
Regionalground-water
system
Crop Irrigationevent
Soilhorizon
Cropstage
Weatherrecord
Drainagelevel
Substance
Transformationschedule
Depositionscheme
Annualapplicationschedule
General Freundlichsorption
Trans-for-
mation
Depositionrecord
Applicationevent
Diffu-sion
Cropinter-action
Run
Project
Simulationcontrol
Long-termapplicationschedule
The highest level in the database hierarchy is the project level, which allows you to organize the data.
The on-line help function is an important feature of the system. The manual contains guidelines on model-use, derivation of model parameters and background information.
PEARL has a build in viewer. All PEARL graphs can be saved as Enhanced Windows Metafiles, which can be imported in (for example) Word 97
Tier I assessments
FOCUS
Let’s now have a look at the FOCUS scenario’s. In the following section, we will show you the most important steps.
Step 1Add and edit a substance
Before you can start using the FOCUS scenario’s, you have to add or edit a substance.
Push to add substance
Put in data
Additional input sheets
Close when finished
Add a substance
Step 2Add and edit an application
schedule
As a second step, you will have to edit or add an application schedule.
Push to add / edit application
Specify applications and details within scheme
Choose or add a scheme
Step 3Generate runs with the
Focus wizard
Now the database contains all the required information. You can now generate Focus runs by combining crops, locations, a substance and an application scheme.
Push to generate runs
Select one or more crops
Select one or more locations
Select substance, application schedule and repeat interval
PEARL will now create a new project, containing all possible combinations (= runs).
These runs are automatically selected for execution.
Step 4Refinement
You may want to edit the individual runs before actually running the model.
You are free to assign different application schedules to individual runs.
Step 5Run the model
You can execute several model runs with one push on a button.
Push to execute selected runs
The User Interface will createthe input files and run the model.
You can follow the course of the simulations
Step 6View model results
PEARL has predefined graphs and reports, specially dedicated to the first tier of the registration procedure.