Hydrology Engineering Design: Rainfall Analysis
This tool implements standard hydrological methods for rainfall analysis including Thiessen Polygon, Arithmetic Mean, and Normal Ratio methods.
Input Data for Kitchener City Rainfall Stations
Enter rainfall data (in mm) and station coverage area (in km²) for 6 rainfall stations in Kitchener City region.
Station Rainfall Data (mm)
Enter the precipitation recorded at each station during the storm event:
Station Coverage Area (km²)
Enter the area represented by each station for Thiessen Polygon method:
Additional Parameters
Arithmetic Mean Method
This method is used when gauges are uniformly distributed and individual gauge catches do not vary greatly about the mean.
Thiessen Polygon Method
This method gives weightage to all gauges based on their area coverage, assuming rainfall at any point within a polygon is the same as at the nearest gauge.
Thiessen Polygon Weight Distribution
Normal Ratio Method
This method is used when normal annual rainfall of index stations differs by more than 10% from that of the missing station.
Results Summary & Comparison
Comparison of different methods for computing average rainfall over Kitchener City watershed.