A range of hydrologic analysis tools have been incorporated into CatchmentSIM to aid users in understanding the differing hydrologic properties of subcatchments within their project and assigning additional hydrologic modeling parameters. These tools include parameter calculation and charting capabilities.
CatchmentSIM includes a facility to covert any GIS data layer to a raster grid layer (Analysis >> Create Grid). The newly created grid layers can be used in conjunction with CatchmentSIM's Raster Calculator (Analysis >> Raster Calculator), lookup tables and the Zonal Statistics form (Analysis >> Grid Calculations >> Zonal Statistics) to assign additional parameters (Manning's 'n' roughness coefficients). A specialised application of this raster calculation facility is incorporated into CatchmentSIM to calculate runoff curve numbers using soils and land use GIS layers (Analysis >> Curve Number Calculator).
CatchmentSIM also includes a range of charts (Analysis >> Graph Wizard) to help investigate the hydrologic properties of subcatchments, these include:
•Downslope flow path long-sections;
•Downstream flow distance vs proportion of in-stream pixels;
•Stream Area Threshold (SAT) vs raster drainage density;
•Stream order vs stream numbers (bifurcation);
•Cumulative stream length vs stream order;
•Relative area vs relative height (hypsometric curve);
•Stream order vs channel drop; and,
•Stream Area Threshold (SAT) vs stream drop relationship vs bifurcation.
