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Regional Flood Frequency Analysis for the Island of Newfoundland

Main Report

The annual cost of flooding to public property in Newfoundland is estimated to be in the hundreds of thousands 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 three previous studies (1971, 1984, 1990), derives a set of equations for estimating return period flood flows in ungauged watersheds.

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Users’ Guide and Electronic Spreadsheet

This Users’ Guide and Electronic Spreadsheet is a companion report to the Regional Flood Frequency Analysis for the Island of Newfoundland (1999). The objective of that 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.

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Spreadsheets:

DISCLAIMER
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.

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