University of Tehran Desert 2008-0875 24 2 2019 12 01 Predicting the limits of the oasis effect as a cooling phenomenon in hot deserts 255 266 76384 10.22059/jdesert.2019.76384 EN A. Ahriz Associate Professor, department of architecture, University of Tebessa, Algeria 0000-0001-5891-0275 S. Fezzai Associate Professor, department of architecture, University of Tebessa, Algeria M. Mady A.A Assistant Professor, Effat University, Saudi Arabia (On Leave: Zagazig Uni. Egypt) Journal Article 2020 06 08 The water, a built environment, and a palm grove are an impressive trilogy making up the formidable oasis, rendering it strong enough to survive the harsh desert climate. Furthermore, the interaction between them creates several natural and physical phenomena. This research discusses the oasis effect, one of the most significant phenomena in the oasis ecosystem; this effect has been treated as a cooling phenomenon in theories and mathematical models. Therefore, we aimed to examine the impact and limits of this phenomenon in regard to the microclimate of oases through digital simulation, using the SPUCAL_oec software (<span style="text-decoration: underline;">S</span>imulation <span style="text-decoration: underline;">P</span>latform of <span style="text-decoration: underline;">U</span>rban <span style="text-decoration: underline;">C</span>limate in <span style="text-decoration: underline;">A</span>rid <span style="text-decoration: underline;">L</span>ands _ <span style="text-decoration: underline;">O</span>ases <span style="text-decoration: underline;">E</span>ffect <span style="text-decoration: underline;">C</span>alculator).  Based on an innovative mathematical model, we developed SPUCAL_oec as an innovative vision for this green phenomenon, programmed to predict, calculate, and simulate the behavior and limits of the palm grove on the oasis microclimate. Finally, the results of SPUCAL_oec model showed that the oasis effect impacted the oasis microclimate owing to the existence of the palm grove. This effect could be as large as 6°C of temperature decrease and 12% increase in relative humidity. Furthermore, the SPUCAL software can aid designers and planners in making decisions regarding their design process. https://jdesert.ut.ac.ir/article_76384_657bbfa7cc8a5b62f5bb4852c5325668.pdf