Water use considerations and cooling effects of urban landscape strategies in a hot dry region Conference Paper uri icon

abstract

  • The water consumption and micrometeorological effects of several strategies for outdoor cooling in an arid climate were monitored over a six-week period in two small, semi- enclosed, courtyards with varying combinations of mature trees, shading mesh, lawn and paving. Performance was assessed using a new measure of" cooling efficiency" which is proposed as a criterion for evaluating landscape strategies in arid regions. Unshaded grass was the least efficient strategy, combining a high water requirement with negligible cooling, while trees were the most efficient. When the grass was shaded, either by trees or by a shade mesh, a synergic effect produced greater cooling as well as a reduction in total water use, although the mesh alone caused a relative increase of nearly 1K in air temperature.

publication date

  • June 1, 2009