Changeset 2729

Apr 19, 2006, 6:15:06 PM (17 years ago)

updates to user_manual (modelling questions)

1 edited


  • documentation/user_manual/anuga_user_manual.tex

    r2727 r2729  
    18341834\subsubsection{Which diagnostics are available to troubleshoot a simulation?}
     1836\subsubsection{How do I use a DEM in my simulation?}
     1837You use \code{dem2pts} to convert your DEM to the required .pts format. This .pts file is then called When setting the elevation data to the mesh
     1838in \code{domain.set_quantity}
     1840\subsubsection{What sort of DEM resolution should I use?}
     1841Try and work with the "best" you have available. Onshore DEMs are typically available in 25m, 100m and 250m grids. Note, offshore data is often sparse,
     1842or non-existant.
     1844\subsubsection{What sort of mesh resolution should I use?}
     1845The mesh resolution should be commensurate with your DEM - it does not make sense to put in place a mesh which is finer than your DEM. As an example,
     1846if your DEM is on a 25m grid, then the cell resolution should be of the order of 315$m^2$ (this represents half the area of the square grid). Ideally,
     1847you need a fine mesh over regions where the DEM changes rapidly, and other areas of significant interest, such as the coast.
     1849\subsubsection{How often should I store the output?}
     1850This will depend on what you are trying to answer with your model and how much memory you have available on your machine. If you need
     1851to look in detail at the evolution, then you will need to balance against your storage requirements and the duration of the simulation.
     1852If the sww file exceeds 1Gb, another sww file will be created until the end of the simulation. As an example, to store all the conserved
     1853quantities on a mesh with approximately 300000 triangles on a 2 min interval for 5 hours will result in approximately 350Mb sww file.
    18361855\subsection{Boundary Conditions}
Note: See TracChangeset for help on using the changeset viewer.