Journal article
The Applicability of Classical Predictive Equations for the Estimation of Evapotranspiration from Urban Green Spaces: Green Roof Results
World Environmental and Water Resources Congress 2011: Bearing Knowledge for Sustainability, pp 783-792
01 May 2011
Abstract
Green roofs and other urban green spaces can provide a variety of valuable benefits linked to evaporative processes. Accurate and representative estimation of urban evapotranspiration (ET) is a necessary tool for predicting and quantifying such benefits. However, many common ET estimation procedures were developed for agricultural applications, and thus carry inherent assumptions that may not be applicable to urban green spaces, including green roofs. The performance of two Penman-Monteith based ET estimation methodologies (ASCE Standardized Reference ET Equation and MORECS model of NRCC) using onsite and regional data sets (respectively), were compared, for daily time steps, to weighing lysimeter measurements of actual ET at a green roof site in the Bronx, NY. Predictions made based on regional data sets were found to generally perform poorly in predicting ET from the green roofs. Using climatic data obtained onsite, the ASCE Standardized Reference Evapotranspiration Equation, gave reasonable predictions of actual daily evapotranspiration for 30 different non-consecutive days during which ET was expected to be at potential rates, with a cumulative overestimation over the 30 day period of 2.3%. However, it is recognized that the 30 non-consecutive days represent Fall months only, and that further onsite measurements will be necessary to evaluate the performance of the equations over different seasons at this location.
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6 citations in Scopus
Details
- Title
- The Applicability of Classical Predictive Equations for the Estimation of Evapotranspiration from Urban Green Spaces: Green Roof Results
- Creators
- Kimberly DiGiovanniStuart GaffinFranco MontaltoCynthia Rosenzweig
- Publication Details
- World Environmental and Water Resources Congress 2011: Bearing Knowledge for Sustainability, pp 783-792
- Conference
- World Environmental and Water Resources Congress 2011: Bearing Knowledge for Sustainability
- Number of pages
- 1
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Civil, Architectural, and Environmental Engineering
- Scopus ID
- 2-s2.0-79960401850
- Other Identifier
- 991019173909604721