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Study of dew water collection in humid tropical islands

hal.structure.identifierSciences pour l'environnement [SPE]
hal.structure.identifierInternational Organization for Dew Utilization
dc.contributor.authorCLUS, Owen
hal.structure.identifierInternational Organization for Dew Utilization
hal.structure.identifierUniversité de la Polynésie Française [UPF]
dc.contributor.authorORTEGA, Pascal
hal.structure.identifierSciences pour l'environnement [SPE]
hal.structure.identifierInternational Organization for Dew Utilization
dc.contributor.authorMUSELLI, Marc
hal.structure.identifierInternational Organization for Dew Utilization
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
hal.structure.identifierESEME : Équipe du Supercritique pour l'Environnement, les Matériaux et l'Espace : Équipe commune CEA-CNRS (2000-2014)
dc.contributor.authorMILIMOUK, Iryna
hal.structure.identifierInternational Organization for Dew Utilization
hal.structure.identifierPhysique et mécanique des milieux hétérogenes (UMR 7636) [PMMH]
hal.structure.identifierService des Basses Températures [SBT ]
hal.structure.identifierESEME : Équipe du Supercritique pour l'Environnement, les Matériaux et l'Espace : Équipe commune CEA-CNRS (2000-2014)
dc.contributor.authorBEYSENS, Daniel
dc.date.created2007
dc.date.issued2008
dc.identifier.issn0022-1694
dc.description.abstractEnAn assessment of the potential for dew water to serve as a potable water source during a rainless season in a humid tropical climate was carried out in the Pacific islands of French Polynesia. The climate of these islands, in terms of diurnal and seasonal variations, wind and energy balance, is representative of the climate of the tropical Atlantic and Pacific oceans. Measurements were obtained at two characteristic sites of this region; a mountainous island (Punaauia, Tahiti Island) and an atoll (Tikehau, Tuamotu Archipelago). Dew was measured daily on a 30° tilted, 1 m2 plane collector equipped with a thermally insulated radiative foil. In addition, an electronic balance placed at 1 m above the ground with a horizontal 0.16 m2 condensing plate made of PolyTetraFluoroEthylene (Teflon) was used in Tahiti. Dew volume data, taken during the dry season from 16/5/2005 to 14/10/2005, were correlated with air temperature and relative humidity, wind speed, cloud cover and visible plus infrared radiometer measurements. The data were also fitted to a model. Dew formation in such a tropical climate is characterized by high absolute humidity, weak nocturnal temperature drop and strong Trade winds. These winds prevent dew from forming unless protected e.g. by natural vegetal windbreaks. In protected areas, dew can then form with winds as large as 7 m/s. Such strong winds also hamper at night the formation near the ground of a calm and cold air layer with high relative humidity. As the cooling power is lower than in the Mediterranean islands because of the high absolute humidity of the atmosphere, both effects combine to generate modest dew yields. However, dew events are frequent and provide accumulated amounts of water attractive for dew water harvesting. Slight modifications of existing rain collection devices on roofs can enhance dew formation and collection. Dew harvesting thus appears as an attractive possibility to provide the local population with a complementary - but on occasion, essential - water resource
dc.language.isoen
dc.publisherElsevier
dc.subject.enTropical islands
dc.subject.endew harvesting
dc.subject.enwater resource
dc.subject.ensky radiation
dc.subject.enradiative cooling
dc.title.enStudy of dew water collection in humid tropical islands
dc.typeArticle de revue
dc.identifier.doi10.1016/j.jhydrol.2008.07.038
dc.subject.halPhysique [physics]/Physique [physics]/Physique Générale [physics.gen-ph]
bordeaux.journalJournal of Hydrology
bordeaux.page159-171
bordeaux.volume361
bordeaux.issue1-2
bordeaux.peerReviewedoui
hal.identifierhal-00326152
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00326152v1
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