UC-IEG-III

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Use Case title: Analysis of Water Quality in Reservoirs

Short description: We are using DYRESM/CAEDYM model to analyze water quality in catchments, in particular in the Itoiz dam, near Pamplona (Spain). Within this model both Hydrologic and Ecological analysis are possible and it is specially suited for multi-parametric batch-job submissions. DYRESM/CAEDYM is a product developed by the Centre for Water Research from the University of Western Australia. Software must be downloaded from their web site, and free user registration is required (see http://www.cwr.uwa.edu.au). The installation of the software on the int.eu.grid testbed is not complicated as the model comes presented in a tar-ball including all the necessary binary files for execution. A post-simulation analysis software (Modeller) is also available, and its use is highly recommended for graphical analysis and representation. The integration of the Modeller inside the Migrating Desktop is one of the open issues.

Actors involved:

The model requires seven files as input data:

  • An Stage file containing morphometry information about the location (eg: test.stg)
  • A Meteorological data file with the meteorological conditions during the simulation span (eg: test.met)
  • An Inflow file with variable measures relative to the water inflows to the reservoir (eg: test.inf)
  • A Withdrawals file containing measures of the output water flux in the reservoir (eg: test.wdr)
  • A file containing an initial profile of the variables under analysis in the water reservoir (eg: test.pro)
  • A Simulation parameter file (eg: test.par)
  • A Simulation configuration file (eg: test.cfg)

Simulation: Simulation execution process is linear and consists of four steps:

  • #createDYref test.stg test.met test.inf test.wdr DYref.nc
  • #createDYsim test.pro test.par DYsim.nc
  • #extractDYinfo DYref.nc DYsim.nc test.cfg
  • #dycd

Step 1 creates a DYRESM reference file (DYref.nc) Step 2 creates a DYRESM unconfigured simulation file (DYsim.nc)

Output Processing: After retrieving the simulation output from the worker node we can use Modeller to visualize the results:

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