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A set of Rainfall options are available to choose from:

Note
Some of the methods may not be available for your region. For more information, refer to the Regionalisation topic.
  • SCS Rainfall Method - was developed by the United States Department of Agriculture - Natural Resources Conservation Service (USDA-NRCS). It generated four synthetic 24-hour rainfall distribution curves that cover all geographical regions of the United States. These curves are described in Appendix B of Technical Release 55.
  • FEH Rainfall - The Flood Estimation Handbook (FEH) software suite implements the Centre for Ecology and Hydrology (CEH) national design standards for rainfall and river flood frequency estimation in the UK. This was published in 1999 and used rainfall from a dataset between 1961 - 1990.
  • FSR Rainfall - The Flood Studies Report (FSR) rainfall-runoff method developed by the Institute of Hydrology (now CEH) in the UK. This was published in the mid-1970s and used rainfall from 1941 - 1970.
  • Australian Rainfall and Runoff - Australian Rainfall and Runoff (ARR) is a national guideline document for the estimation of design flood characteristics in Australia. It is published by Engineers Australia. The coefficients entered will describe the rainfall for a particular area of the country.
  • User Defined Rainfall - Allows one or more rainfall events to be created using a Temporal Pattern based on a given duration and an total Depth (or Average Intensity).
  • Desbordes Rainfall - French Rainfall methodology based on a double-triangle rainfall hyetograph as proposed by Prof. Michel Desbordes (Université de Montpellier) in 1980. 
  • Chinese Rainfall - Design rainfall generated using Chicago rainfall, as proposed by C.J.Keifer & H.H.Chu in 1957.
  • Known Rainfall- A set of rainfall records can be entered or loaded from file. These could be from other synthetic rainfall methodology outside of those listed above or even a real recorded event. Options to load from CSV, TXT and Excel formats are available for ease.
  • Temporal Pattern - When incorporated into the User Defined Rainfall option will specify the shape of the resultant hyetograph
  • IDF - Used as part of the Rational Method Design Criteria methodology for sizing of pipes and channels.