1,721,141 research outputs found
A continuous simulation approach to quantify the climate condition effect on the hydrologic performance of green roofs
No full textIn order to effectively estimate the hydrologic performance of green roofs, continuous simulation approaches are recently used thus allowing to include the precipitation regime features as well as the varying soil moisture conditions. Continuous simulations are implemented in the EPA Storm Water Management Model (SWMM) using as input data the climate data series recorded at three Italian sites (Bergamo, Genoa and Castelbuono) while a simple methodological approach is adopted to estimate the actual evapotranspiration. Results are examined at the event scale by means of the volume and the peak reduction rates. Results confirm the positive impact of green roof retrofitting scenario for all the investigated climate regimes. On the other hand, the specific rainfall characteristics at the event scale (mainly rainfall depth and antecedent dry weather period) affect both the retention and detention performance of green roofs
Sensitivity analysis of FAO Penman–Monteith reference evapotranspiration (ETo) to climatic variables: the case study of Ligurian territory in Northern Italy.
No full textHYDROLOGIC MODELING OF DOMESTIC RAINWATER HARVESTING SYSTEMS FOR SUB-CATCHMENT SCALE INSTALLATIONS
No full textRainwater harvesting for urban flood management: a modelling framework for sub-catchment scale installations
No full textANALYZING THE RESILIENCE OF A SUSTAINABLE URBAN CATCHMENT TO CLIMATE CHANGE EFFECTS
No full text• Green roofs and permeable pavements are the LIDs selected as resilience measures within the urban catchment: 4 percentage of EIA in the range of 5 and 36 % of the catchment area are simulated;
• The climate change is evaluated by using the Climate Change Factor in the range 1.05 and 1.20 since the 20%-increase of the rainfall intensity for the study of concern is supposed to be reasonable;
• The installation of LIDs partially compensates the impact of the expected increase of rainfall intensities in the design event: the 36% conversion scenario is resilient for both the peak and volume
Partitioning of zinc, copper and lead in urban drainage from paved source area catchments
No full textRepresentation of metal partitioning in urban drainage is required when determining loadings, treatment, maintenance and regulatory compliance. This study examined partitioning and transport of metals from urban paved surfaces: highway; parking lot (landside) and apron terminal (airside) within aviation site; terminals within port area. Equilibrium concentrations of metals and particulate matter (PM) using a non-parametric analysis for a series of six paved surface area catchments were compared. In particular, two American highway sites and four Italian sites located in the Liguria Region (two port terminal and two aviation sites) are examined and compared with event-based concentrations collected from catchments with similar land uses. The highway sites are more heavily loaded with PM (up to averagely 470 mg/l of PM as total suspended solids) while the terminal port ones reveal the most significant mass delivery of metals, as high as 1 mg/l. Transport of metal phases on an event basis, thus relating hydrology and PM mass delivery impacting metal partitioning, are examined. At all catchment sites, copper and lead reveal the greatest affinity for the particulate-bound fraction while zinc shows significantly different partitioning behaviour that may be partially depending on the specific site characteristics and the chemistry of zinc. Partitioning, indexed through a partitioning coefficient, Kd, accounts for hydrologic transport, PM transport and interactions with and between metals. Kd can vary by orders of magnitude across a runoff event for the source area catchments of this study. A Kd condition in the range of 104–105 l/kg appears to be approached for all metals as elapsed runoff time increases. Based on the variability of partitioning, whether intra- or inter-event, results indicate that paved source area treatment requires a combination of sedimentation, filtration and adsorption mechanisms for in-situ unit operations and processes
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