Optimization of Roof Coverage and Tank Size for Integrated Green Roof Rainwater Harvesting Systems - a Case Study
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Optimization of Roof Coverage and Tank Size for Integrated Green Roof Rainwater Harvesting Systems - a Case Study. / Xie, Haowen; Randall, Mark; dos Santos, Sylvana Melo.
In: Water Resources Management, Vol. 37, No. 12, 2023, p. 4663-4678.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Optimization of Roof Coverage and Tank Size for Integrated Green Roof Rainwater Harvesting Systems - a Case Study
AU - Xie, Haowen
AU - Randall, Mark
AU - dos Santos, Sylvana Melo
N1 - Publisher Copyright: © 2023, The Author(s), under exclusive licence to Springer Nature B.V.
PY - 2023
Y1 - 2023
N2 - Rainwater harvesting (RWH) systems are effective in alleviating water supply shortages, while green roofs (GRs) can contribute to stormwater management, air quality improvement, thermal regulation of buildings, and biodiversity support. Despite their individual benefits, both systems are not frequently combined. This paper investigates the potential for integrating these systems through a hydrologic modeling and optimization approach, using a case study in Paris, France. The study utilized a Conceptual Interflow model (CI-model) coupled with a Water Balance (WB) model to describe the rainfall-runoff relationship of integrated green roof and rainwater harvesting (GR-RWH) systems. An NSGA-II optimization was then applied to the CI-WB model to determine the optimal tank sizing of GR-RWH systems for meeting different water demands. The results show that GR-RWH systems have water reliability (WR) values similar to those of traditional RWH systems without GR, albeit with larger tank volumes. For new buildings in Paris, a GR-RWH system with approximately 25 to 75% GR coverage meets rainwater utilization needs with low investment while also providing the added benefits of GRs.
AB - Rainwater harvesting (RWH) systems are effective in alleviating water supply shortages, while green roofs (GRs) can contribute to stormwater management, air quality improvement, thermal regulation of buildings, and biodiversity support. Despite their individual benefits, both systems are not frequently combined. This paper investigates the potential for integrating these systems through a hydrologic modeling and optimization approach, using a case study in Paris, France. The study utilized a Conceptual Interflow model (CI-model) coupled with a Water Balance (WB) model to describe the rainfall-runoff relationship of integrated green roof and rainwater harvesting (GR-RWH) systems. An NSGA-II optimization was then applied to the CI-WB model to determine the optimal tank sizing of GR-RWH systems for meeting different water demands. The results show that GR-RWH systems have water reliability (WR) values similar to those of traditional RWH systems without GR, albeit with larger tank volumes. For new buildings in Paris, a GR-RWH system with approximately 25 to 75% GR coverage meets rainwater utilization needs with low investment while also providing the added benefits of GRs.
KW - Economic feasibility
KW - Green roof
KW - Optimization analysis
KW - Rainwater harvesting
KW - Return on investment period
KW - Runoff modelling
U2 - 10.1007/s11269-023-03568-z
DO - 10.1007/s11269-023-03568-z
M3 - Journal article
AN - SCOPUS:85171284131
VL - 37
SP - 4663
EP - 4678
JO - Water Resources Management
JF - Water Resources Management
SN - 0920-4741
IS - 12
ER -
ID: 371613404