Short introduction to the use of PEARL General properties First 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.
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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.
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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.
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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
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The highest level in the database hierarchy is the project level, which allows you to organize the data.
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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.
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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
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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.
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Step 1Add and edit a substance
Before you can start using the FOCUS scenario’s, you have to add or edit a substance.
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Push to add substance
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Put in data
Additional input sheets
Close when finished
Add a substance
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Step 2Add and edit an application
schedule
As a second step, you will have to edit or add an application schedule.
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Push to add / edit application
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Specify applications and details within scheme
Choose or add a scheme
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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.
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Push to generate runs
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Select one or more crops
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Select one or more locations
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Select substance, application schedule and repeat interval
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PEARL will now create a new project, containing all possible combinations (= runs).
These runs are automatically selected for execution.
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Step 4Refinement
You may want to edit the individual runs before actually running the model.
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You are free to assign different application schedules to individual runs.
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Step 5Run the model
You can execute several model runs with one push on a button.
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Push to execute selected runs
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The User Interface will createthe input files and run the model.
You can follow the course of the simulations
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Step 6View model results
PEARL has predefined graphs and reports, specially dedicated to the first tier of the registration procedure.
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View reports and graphs
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Look at the FOCUS summary graph.
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* ------------------------------------------------------------------------------* ###### ###* ## ## ##* ## ## ##### ##### ## ### ##* ##### ## # # ### ## ##* ## ####### ###### ## ## PearlModelv1.1-sr3* ## ## # ## ## ## 15-Aug-2000* #### ##### #### ## #### #### (c) RIVM/Alterra* Pesticide Emission Assessment for Regional and Local scales* ------------------------------------------------------------------------------** Pearl run at 01-09-2000 on 15:00** Output generated for FOCUS* Location: CHATEAUDUN* Meteo station CHAT-M* Soil type CHAT-S_Soil* Crop calendar CHAT-APPLES* Substance A* Application scheme FOCUS_AUTUMN* Irrigation scheme CHAT-IRR-D* ------------------------------------------------------------------------------* Intermediate Focus output for compound A* Molar mass (g.mol-1) : 300.0* Saturated vapour pressure (Pa) : 0.1E-09; measured at (C) 20.0* Solubility in water (mg.L-1) : 0.9E+02; measured at (C) 20.0* Half-life (d) : 60.0; measured at (C) 20.0* Kom (coef. for sorption on organic matter) (L.kg-1) : 60.0* Freundlich exponent (-) : 0.90 ----------------------------------------------------------------------------------------------------------------------------------* yr Identifier AmaLea FlvLea ConLea* (kg/ha) (m) (ug/L)1907 Focus_A 0.22412E-01 0.54834 4.08731908 Focus_A 0.18553E-01 0.42809 4.33401909 Focus_A 0.20426E-01 0.47251 4.32291910 Focus_A 0.27916E-01 0.45838 6.09021911 Focus_A 0.44740E-01 0.60899 7.34651912 Focus_A 0.42548E-01 0.49126 8.66101913 Focus_A 0.40576E-01 0.53318 7.61021914 Focus_A 0.37285E-01 0.57541 6.47971915 Focus_A 0.24883E-01 0.42412 5.86701916 Focus_A 0.36525E-01 0.63208 5.77851917 Focus_A 0.29609E-01 0.44949 6.58731918 Focus_A 0.33672E-01 0.46148 7.29651919 Focus_A 0.26952E-01 0.45935 5.86741920 Focus_A 0.32178E-01 0.51934 6.19601921 Focus_A 0.25109E-01 0.38972 6.44271922 Focus_A 0.12728E-01 0.34364 3.70391923 Focus_A 0.10624E-01 0.38825 2.73641924 Focus_A 0.13643E-01 0.42882 3.18151925 Focus_A 0.14069E-01 0.39062 3.60161926 Focus_A 0.20659E-01 0.44992 4.5917
* The average concentration of A closest to the 80th percentile is 7.297 ug/L* This value occurs in period from 01-Jan-1918 to 31-Dec-1918
* End of PEARL report
Part of summary output
FOCUS target output
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Higher tier assessments
In higher tier assessments, you will have to add site-specific data. You can make adaptations to existing data, or start from scratch.
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Change scenario properties
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Import weather data
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Add or change soil profile
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Add or change soil building blocks, put in characteristic values
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Select lower boundary condition and, if necessary, put in data
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In the case of higher tier assessments, you may want to have a look at more specific model outputs
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You have seen some features and applications of the PEARL model
Download the model, register and try it.
Don’t forget to use theon-line manual!
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