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.
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.
View reports and graphs
Look at the FOCUS summary graph.
* ------------------------------------------------------------------------------* ###### ###* ## ## ##* ## ## ##### ##### ## ### ##* ##### ## # # ### ## ##* ## ####### ###### ## ## 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
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.
Change scenario properties
Import weather data
Add or change soil profile
Add or change soil building blocks, put in characteristic values
Select lower boundary condition and, if necessary, put in data
In the case of higher tier assessments, you may want to have a look at more specific model outputs
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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