Estimation of Evapotranspiration from Bioretention Areas Using Weighing Lysimeters
Publication: Journal of Hydrologic Engineering
Volume 15, Issue 6
Abstract
In moving toward a water balance approach to storm water management and the modeling tools that can support such an approach, it is clear that there are substantial gaps in our knowledge of the groundwater recharge and evapotranspiration (ET) in urban areas. At a microscale, weighing lysimeters can be used to estimate the ET and may also be designed to also allow drainage (groundwater recharge) to be quantified. A weighing lysimeter has been designed and constructed in Guelph, Ont. to quantify the ET and groundwater recharge from a bioretention area. The results at this scale will vary with the urban surroundings, but will nevertheless contribute to the scant information available. The installation of similar systems in various urban micrometeorological conditions will help to build a database of urban ET and recharge. Other approaches, such as the eddy correlation approach for the ET, are also needed to complement microscale measurements.
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Acknowledgments
The writers would like to thank the research sponsors: the University of Guelph (Ed Martin, Director, Environmental Services; John Reinhart, Physical Resources), Connon Nurseries (Mark and Rick Vanderkruk), and Gro-Bark (Keith Osbourne and Neil McKeown). Also special thanks to Fern Ridge Landscaping (Sean James N.P.D.) for all his invaluable support and knowledge and to Steffen Pentelow and Nirmal Shaw for all their hard work during installation and during system monitoring.
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Information & Authors
Information
Published In
Journal of Hydrologic Engineering
Volume 15 • Issue 6 • June 2010
Pages: 522 - 530
Copyright
© 2010 ASCE.
History
Received: Nov 30, 2008
Accepted: Dec 22, 2009
Published online: Jan 22, 2010
Published in print: Jun 2010
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