Next Article in Journal
Reducing High Flows and Sediment Loading through Increased Water Storage in an Agricultural Watershed of the Upper Midwest, USA
Previous Article in Journal
In Situ Water Quality Improvement Mechanism (Nitrogen Removal) by Water-Lifting Aerators in a Drinking Water Reservoir
Previous Article in Special Issue
Effect of Green Roof Configuration and Hydrological Variables on Runoff Water Quantity and Quality
Article Menu

Export Article

Open AccessArticle
Water 2018, 10(8), 1052; https://doi.org/10.3390/w10081052

Assessing the Hydrologic Performance of a Green Roof Retrofitting Scenario for a Small Urban Catchment

Department of Civil, Chemical and Environmental Engineering, University of Genova, Genoa 16145, Italy
*
Author to whom correspondence should be addressed.
Received: 11 July 2018 / Revised: 2 August 2018 / Accepted: 6 August 2018 / Published: 8 August 2018
(This article belongs to the Special Issue Hydrological Performance of Green Roofs)
View Full-Text   |   Download PDF [1177 KB, uploaded 8 August 2018]   |  

Abstract

In an existing urban environment, retrofitting low impact development (LID) solutions can provide an opportunity to address flooding and water quality problems. Taking into account the need to effectively estimate the impact of vegetated LIDs, particular attention has recently been given on the evapotranspiration (ET) process that is responsible for the restoring of green roof water-holding capacity. The present study aims to develop a methodological approach to estimate the actual ET as climate input data in the United States Environmental Protection Agency (EPA) Storm Water Management Model (SWMM) continuous simulation. The proposed approach is calibrated on a single green roof installation based on one-minute continuous simulations over 26 years of climate records. Then the calibrated methodological approach has been implemented to perform continuous simulation of a small urban catchment retrofitted with green roofs. Based on simulation results, the peak and volume reduction rate evaluated for the 1433 rainfall events are equal to 0.3 on average (with maximum values of 0.96 for peak and 0.86 for volume). In general, the adopted methodology indicates that the actual ET estimate is needed to suitably assess the hydrologic performance of vegetated LIDs mainly concerning the volume reduction index; furthermore, the methodology can be easily replicated for other vegetated LID applications. View Full-Text
Keywords: detention; evapotranspiration; green roof; hydrologic modelling; retention; source control; Storm Water Management Model (SWMM) detention; evapotranspiration; green roof; hydrologic modelling; retention; source control; Storm Water Management Model (SWMM)
Figures

Figure 1

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).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Palla, A.; Gnecco, I.; La Barbera, P. Assessing the Hydrologic Performance of a Green Roof Retrofitting Scenario for a Small Urban Catchment. Water 2018, 10, 1052.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Water EISSN 2073-4441 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top