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Tool to Address Green Roof Widespread Implementation Effect in Flood Characteristics for Water Management Planning : Volume 370, Issue 370 (11/06/2015)

By Tassi, R.

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Book Id: WPLBN0004021396
Format Type: PDF Article :
File Size: Pages 6
Reproduction Date: 2015

Title: Tool to Address Green Roof Widespread Implementation Effect in Flood Characteristics for Water Management Planning : Volume 370, Issue 370 (11/06/2015)  
Author: Tassi, R.
Volume: Vol. 370, Issue 370
Language: English
Subject: Science, Proceedings, International
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2015
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Tassi, R., Allasia, D. G., & Lorenzini, F. (2015). Tool to Address Green Roof Widespread Implementation Effect in Flood Characteristics for Water Management Planning : Volume 370, Issue 370 (11/06/2015). Retrieved from http://www.ebooklibrary.org/


Description
Description: Federal University of Santa Maria, Santa Maria, Brazil. In the last decades, new approaches were adopted to manage stormwater as close to its source as possible through technologies and devices that preserve and recreate natural landscape features. Green Roofs (GR) are examples of these devices that are also incentivized by city's stormwater management plans. Several studies show that GR decreases on-site runoff from impervious surfaces, however, the analysis of the effect of widespread implementation of GR in the flood characteristics at the urban basin scale in subtropical areas are little discussed, mainly because of the absence of data. Thereby, this paper shows results related to the monitoring of an extensive modular GR under subtropical weather conditions, the development of a rainfall–runoff model based on the modified Curve Number (CN) and SCS Triangular Unit Hydrograph (TUH) methods and the analysis of large-scale impact of GR by modelling different basins. The model was calibrated against observed data and showed that GR absorbed almost all the smaller storms and reduced runoff even during the most intense rainfall. The overall CN was estimated in 83 (consistent with available literature) with the shape of hydrographs well reproduced. Large-scale modelling (in basins ranging from 0.03 ha to several square kilometers) showed that the widespread use of GRs reduced peak flows (volumes) around 57% (48%) at source and 38% (32%) at the basin scale. Thus, this research validated a tool for the assessment of structural management measures (specifically GR) to address changes in flood characteristics in the city's water management planning. From the application of this model it was concluded that even if the efficiency of GR decreases as the basin scale increase they still provide a good option to cope with urbanization impact.

Summary
Tool to address green roof widespread implementation effect in flood characteristics for water management planning

Excerpt
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