Regionalization of heavy rainfall to improve climatic design values for infrastructure: case study in Southern Ontario, Canada

Autor: Heather Auld, Edson Paixao, Mark W. Shephard, M. Monirul Qader Mirza, Joan Klaassen
Rok vydání: 2011
Předmět:
Zdroj: Hydrological Sciences Journal. 56:1067-1089
ISSN: 2150-3435
0262-6667
Popis: Southern Ontario, Canada, has been impacted in recent years by many heavy rainfall and flooding events that have exceeded existing historical estimates of infrastructure design rainfall intensity–duration–frequency (IDF) values. These recent events and the limited number of short-duration recording raingauges have prompted the need to research the climatology of heavy rainfall events within the study area, review the existing design IDF methodologies, and evaluate alternative approaches to traditional point-based heavy rainfall IDF curves, such as regional IDF design values. The use of additional data and the regional frequency analysis methodology were explored for the study area, with the objective of validating identified clusters or homogeneous regions of extreme rainfall amounts through Ward's method. As the results illustrate, nine homogeneous regions were identified in Southern Ontario using the annual maximum series (AMS) for daily and 24-h rainfall data from climate and rate-of-rainfall ...
Databáze: OpenAIRE
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