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Technical issues related to the ERICA Tool (on Facilia website)

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Posted: 1230/0809/2010

Time series data

From:
Marko Černe
Jožef Stefan Institute
Slovenia Chutarat Saengkulž
Burapha University
THAILAND

Question:
I am trying to apply the ERICA Tool to plants. If a plant, such as the Marsh Marigold, has a large leave on top of the stem - what dimensions should be used?

Answer:

To be honest perhaps the plant geometries have not been well thought out to date - they do not really represent whole-organisms as perhaps implied by documentation accompanying the ERICA Tool. The grass geometry in the ERICA Tool is taken from the ICRP Wild Grass RAP and is a 'grass spike'; no in soil dose rates are estimated only above ground. If you are concerned that the default plant may not adequately represent the species you want to assess then have a play with the create organism function of Tier 2 or 3: create an organism to represent your marigold leaf and compare DCC values to the default grass. We'd be interested to hear what you find.

have a problem about putting data into the ERICA Tool - I have many data forcesium-137 concentrations in water and fish from1962-2006 but I cannot put all data in ERICA Tool. Now I can input one data point from one year to calculate the absorbed dose rate. Please advise me about how to input such data into Tier 2 of the ERICA Tool.

Answer:

_Currently, you cannot input time series data, or data for more than one location, into the ERICA Tool to model in a single run. This functionality is something which has been requested previously by users and it MAY be provided in future Tool versions.

How you can best proceed depnds upon what you want to do to some extent. Here are two suggestions:

1. As you are only considering Cs-137 you could extract the DCC values and if required Kd and CR values from the Tool and use them in an Excel spreadsheet.
2. If you have multiple entries for a single year you could use Tier 3 to input mean values with an associated pdf._

Answered by Nick Beresford 30Answered by Nick Beresford 26/09/2010

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Posted: 23/09/2010

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