Water yield variability index, selected drainage regions, 1971 to 2013

This product provides the variability index for selected drainage regions in Canada. Variability is measured using a coefficient of variation (CV) to compare all months over a 42-year time period and is a measure of the dispersion or variation in the monthly yield values from 1971 to 2013 (and 1971 to 2012 for drainage region 1). It is defined as the ratio of the standard deviation to the mean or the standard deviation divided by the mean, with higher CVs indicating more variability in monthly water yields. The monthly variability was not calculated for drainage regions 5, 7, 8, 16, 17, 18, or the Labrador portion of 25.

Data and Resources

Additional Info

Field	Value
Last Updated	April 17, 2026, 21:59 (UTC)
Created	April 17, 2026, 17:20 (UTC)
contact_email	francois.soulard@canada.ca
contact_person	{"fr": "Gouvernement du Canada; Statistique Canada; Division de la statistique de l'environnement, de l'énergie et des transports,francois.soulard@canada.ca", "en": "Government of Canada; Statistics Canada; Environment, Energy and Transportation Statistics Division,1 (613) 8828603,francois.soulard@canada.ca"}
criticality_level	[]
data_dictionary	["environment"]
geographic_scope	[]
open_canada_collection	fgp
open_canada_date_published	2017-03-21 00:00:00
open_canada_keywords	{"fr": ["Indice de variabilité de l’apport en eau", "Approvisionnement en eau", "Eau", "Données géographiques", "Eau de surface", "Eau douce"], "en": ["Water yield variability index", "Water supply", "Water", "Geographic data", "Surface water", "Fresh water"]}
open_canada_subject	["nature_and_environment"]
sensitivity_level	unrestricted
title_fr	Indice de variabilité de l’apport en eau, certaines régions de drainage, 1971 à 2013
update_frequency	as_needed