Start Updating the davenport roughness classification

Updating the davenport roughness classification

Operational and meteorological requirements for terrain roughness classifications are developed.

The assessment is performed by computational fluid dynamics (CFD) based on the 3D steady RANS equations and an Eulerian advection-diffusion equation.

ABSTRACT: Heat waves and the related heat stress can increase human morbidity and mortality, decrease human productivity and increase building energy consumption for cooling.

There is a need for sustainable systems to reduce heat stress in urban areas.

In addition, a thermal comfort improvement from strong heat stress (without spray system) to moderate heat stress up to a distance of 5m from the spray line is obtained.

ABSTRACT: This paper presents a framework to estimate aerodynamic roughness over specific height (zo/H) and zero plane displacement (d/H) over various landscapes in Kelantan State using airborne Li DAR data.

Forest structural parameters including tree height, height to crown base (HCB) and diameter at breast height (DBH) were estimated using existing allometric equations.

The airborne Li DAR data was divided into smaller areas, which correspond to the size of the zo/H and d/H maps i.e. For each area individual tree were reconstructed based on the tree properties, which accounts overlapping between crowns and trunks.

To our knowledge, a systematic investigation of the cooling potential of such a system in an actual urban area has not yet been performed.