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Water 2017, 9(2), 72; doi:10.3390/w9020072

Including A-Priori Assessment of Actual Evapotranspiration for Green Roof Daily Scale Hydrological Modelling

1
Department of Civil Engineering, University of Salerno, 84084 Fisciano, SA, Italy
2
Department of Civil Engineering, Trier University of Applied Sciences, 54293 Trier, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Richard Smardon
Received: 25 October 2016 / Revised: 3 January 2017 / Accepted: 16 January 2017 / Published: 24 January 2017
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Abstract

In the last decades, there has been a widespread implementation of Green Infrastructures worldwide. Among these, green roofs appear to be particularly flexible sustainable drainage facilities. To predict their effectiveness for planning purposes, a tool is required that provides information as a function of local meteorological variables. Thus, a relatively simple daily scale, one-dimensional water balance approach has been proposed. The crucial evapotranspiration process, usually considered as a water balance dependent variable, is replaced here by empirical relationships providing an a-priori assessment of soil water losses through actual evapotranspiration. The modelling scheme, which under some simplification can be used without a calibration process, has been applied to experimental runoff data monitored at a green roof located near Bernkastel (Germany), between April 2005 and December 2006. Two different empirical relationships have been used to model actual evapotranspiration, considering a water availability limited and an energy limited scheme. Model errors quantification, ranging from 2% to 40% on the long-term scale and from 1% to 36% at the event scale, appear strongly related to the particularly considered relationship. View Full-Text
Keywords: sustainable urban drainage; green infrastructures; green roof; actual evapotranspiration; antecedent precipitation index method; Advection Aridity method sustainable urban drainage; green infrastructures; green roof; actual evapotranspiration; antecedent precipitation index method; Advection Aridity method
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Mobilia, M.; Longobardi, A.; Sartor, J.F. Including A-Priori Assessment of Actual Evapotranspiration for Green Roof Daily Scale Hydrological Modelling. Water 2017, 9, 72.

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