Model Construction:Global parameters
The global parameters of a simulation refer to the input control and other parameters not assigned on a cell-by-cell basis; e.g., the numerical method for computing overland flow, the computational time-step and total simulation time, and whether to activate certain model options such as channel routing, long-term simulations, infiltration, evapotranspiration, groundwater interaction, etc.
To have WMS allocate the memory required for development and storage of GSSHA model parameters, you must first initialize a simulation. This is usually done when creating a grid, because WMS prompts the user whether or not to do so. However, the simulation parameters can be initialized or deleted using the identified buttons in the GSSHA Job Control Parameters dialog. Data necessary to run a GSSHA simulation are determined based on the settings in the GSSHA Job Control Parameters dialog (Figure 4). A better description of the various options is provided in the next several sections.
- Model Construction