Municipal Affairs and Environment

Regional Flood Frequency Analysis for Newfoundland and Labrador (2014)

Main Report (2014)

The annual cost of flooding to public property in Newfoundland and Labrador is estimated to be in the millions of dollars range. Accurate flood flow estimates are needed for the efficient design of instream structures (culverts, bridges, spillways, etc.) and for floodplain management. The locations for which flood flow estimates are required usually do not have streamflow data which could be used to directly estimate the flood flows. This study, like four previous studies (1971, 1984, 1990, 1999), derives a set of equations for estimating return period flood flows in ungauged watersheds. The 2014 study is the first to provide equations for Labrador.

PDF Note: all links below are PDFs and will open in a new window.

^ Top of Page

Users’ Guide and Electronic Spreadsheet (2014)

This Users’ Guide and Electronic Spreadsheet is a companion report to the Regional Flood Frequency Analysis for Newfoundland and Labrador (2014). The objective of the study was to develop a set of equations to estimate return period flood flows on ungauged watersheds. Flood flow estimates are required for the hydraulic design of instream structures and for floodplain management. This Users’ Guide was designed to assist engineers in the application of these equations. The electronic spreadsheet automates the calculations.


While every effort has been made to test the electronic spreadsheet, the Government of Newfoundland and Labrador makes no warranties expressed or implied, as to the performance of this spreadsheet. Users are expected to use professional engineering judgement in the application of the spreadsheet.




The 1999 RFFA Study for the Island of Newfoundland

This material is provided for reference purposes only


^ Top of Page

Adobe® Acrobat® Reader software can be used for viewing PDF documents. Download Acrobat® Reader for free opens new window

Last Updated:
This page and all contents are copyright, Government of Newfoundland and Labrador, all rights reserved.