Extraction of particle registrations

After the particle tracking has been run, the registration information needs to be read from the output files and processed in a useful way. The Results Tab includes an utility to sift through all the particles and their registrations, to find the ones that you want. This is output from this utility is an ArcGIS point-theme, shape file with the starting locations of the all the particles that meet your registration criteria. The extraction utility allows your to filter the results for:

·         Destination type:

–         Specific sink types (drain, river, unsaturated zone, well, constant concentration boundary or constant concentration sink)

–         Registration codes specified by the user

–         Wells found in the flow results

–         Well fields found in the flow results^*)

·         Layer from which the particles originated

·         Release (birth) time

·         Transport time

Note: To extract particle locations based on well fields requires that different well fields have been defined, see section Specification of Well Fields (V1 p. 728).

The results can be written to either

·         a single shape file where the point attributes allow further selection of the particles in ArcView, or

·         separate files for each destination type and optionally for each layer e.g. one file for each sink type/layer combination.

More detailed information on the actual extraction mechanics can be found in the PT Registration Extraction (V1 p. 372) section.