Co-Authors:
Schiller, G., Forestry Division, Agricultural Research Organization, Israel
Karschon, R., Forestry Division, Agricultural Research Organization, Israel
Abstract:
Schiller, G. and Karschon, R., 1974. Microclimate and recreational value of tree plantings in deserts. Landscape Plann., 1: 329-337. Microclimatic measurements were made in a floodwater irrigated plot ("liman") of Eucalyptus camaldulensis Dehn, of about 0.3 ha, and in the open desert. While air temperature and vapour pressure did not differ appreciably in the two areas, black-body temperature, global radiation, evaporation and wind speed were conspicuously lower in the liman than in the open. As a result, the Index of Thermal Stress (I.T.S.) and the Thermal Sensation (T.S.) of man, computed for two levels of metabolic rate, were always lower under the tree canopy than in the open. During the summer, lower values of I.T.S. and T.S. in the liman provide for greater thermal comfort, thereby enabling tree plantings in deserts to satisfy the recreational needs of the public during the main season of outdoor recreation. During the winter, the liman is clearly too cold and visitors may be expected to stay outside the grove. The implications of the findings for recreation management are discussed and the absence of an "oasis effect" in liman plantations is emphasized. © 1974.