Green roof system is considered a relatively new concept in Malaysia even though it has been implemented widely in the developed countries. Generally, green roofs provide many benefits such as enhancing aesthetical quality of the built environment, reduce urban heat island effect, reduce energy consumption, improve stormwater attenuation, and reduce noise pollution. A better understanding on th...

As the world population continues to increase, with more than 50 percent of people now residing within cities, remaining natural and semi-natural habitats within urban areas play an increasingly important role for people and wildlife (Mortberg and Wallentinus, 2000; Benedict and McMahon, 2002; Jim, 2004; Town and Country Planning Association, 2004; Bierwagen, 2007; Gill et al., 2007; Tratalos e...

Roofs are the first candidates for rainwater harvesting in urban areas. This research integrates quantitative and qualitative data of rooftop stormwater runoff in an urban Mediterranean-weather environment. The objective of this paper is to provide criteria for the roof selection in order to maximise the availability and quality of rainwater. Four roofs have been selected and monitored over a p...

Due to decreases in the availability and quality of traditional water resources, harvested rainwater is increasingly used for potable and non-potable purposes. In this study, we examined the effect of conventional roofing materials (i.e., asphalt fiberglass shingle, Galvalume(®) metal, and concrete tile) and alternative roofing materials (i.e., cool and green) on the quality of harvested rainwa...

Two studies were conducted with the objective of quantifying the carbon storage potential of extensive green roofs. The first was performed on eight roofs in Michigan and four roofs in Maryland, ranging from 1 to 6 years in age. All 12 green roofs were composed primarily of Sedum species, and substrate depths ranged from 2.5 to 12.7 cm. Aboveground plant material was harvested in the fall of 20...

High-rise buildings cause accelerated winds around them. However, the interference effects of high-rise on surrounding low-rise in urban blocks have not been evaluated. This study investigated wind pressure coefficients roofs and walls a building through tunnel experiments. Seventy-two directions were considered from 0° to 355° 5° increments, influence direction was At 30° angle, positive negat...

Abstract The Corona Virus Disease 2019 pandemic is an event of the spread corona virus around world. LIPI researchers stated that air temperature and humidity can affect virus. Coronavirus resistance decreases in hot temperatures high humidity. Based on problem retard virus, a study was carried out effect material thermal conditions buildings to reduce Thermal measurements are 2-story residenti...

This work is settled in the framework of abstract simplicial complexes. We propose a definition of a watershed and of a collapse for maps defined on pseudomanifolds of arbitrary dimension. Through an equivalence theorem, we establish a deep link between these two notions: any watershed can be obtained by collapse iterated until idempotence, and conversely any collapse iterated until idempotence...