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Enhancing the spatial rainfall uniformity of pressurized nozzle simulators

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dc.contributor.authorSilveira, Alexandre
dc.contributor.authorMGP Isidoro, Jorge
dc.contributor.authorDeus, Fábio P. de
dc.contributor.authorReis, Simone Siqueira dos
dc.contributor.authorSilva, António Marciano da
dc.contributor.authorGonçalves, Flávio A.
dc.contributor.authorBretanha Junker Menezes, Paulo Henrique
dc.contributor.authorTiezzi, Rafael de O.
dc.date.accessioned2019-11-20T15:08:00Z
dc.date.available2019-11-20T15:08:00Z
dc.date.issued2017
dc.description.abstractPurpose - Rainfall simulators are used on experimental hydrology, in areas such as, e.g., urban drainage and soil erosion, with important timesaving when compared to real scale hydrological monitoring. The purpose of this paper is to contribute to increase the quality of rainfall simulation, namely, for its use with scaled physical models. Design/methodology/approach - Two pressurized rainfall simulators are considered. M1 uses three HH-W 1/4 FullJet nozzles under an operating pressure of 166.76 kPa and was tested over a 4.00 m length by 2.00 m width V-shaped surface. M2 was prepared to produce artificial rainfall over an area of 10.00m length by 10.00m width. The spatial distribution of rainfall produced from a single nozzle was characterized in order to theoretically find the best positioning for nozzles to cover the full 100m(2) area with the best possible rainfall uniformity. Findings - Experiments with M1 led to an average rainfall intensity of 76.77-82.25 mm h(-1) with a 24.88 per cent variation coefficient and a Christiansen Uniformity Coefficient (CUC) of 78.86 per cent. The best result with M2 was an average rainfall intensity of 75.12-76.83 mm h(-1) with a 21.23 per cent variation coefficient and a CUC of 83.05 per cent. Practical implications - This study contributes to increase the quality of artificial rainfall produced by pressurized rainfall simulators. Originality/value - M2 is the largest rainfall simulator known by the authors worldwide. Its use on rainfall-runoff studies (e.g. urban areas, erosion, pollutant transport) will allow for a better understanding of complex surface hydrology processes.
dc.description.sponsorshipCoordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brasil (CAPES) under the program "CienciasemFronteiras (CSF)" [88881.030412/2013-01]
dc.description.sponsorshipFundacaopara a Ciencia e Tecnologia - Portugal (FCT) [UID/MAR/04292/2013]
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1108/MEQ-07-2015-0140
dc.identifier.issn1477-7835
dc.identifier.issn1758-6119
dc.identifier.urihttp://hdl.handle.net/10400.1/13315
dc.language.isoeng
dc.peerreviewedyes
dc.publisherEmerald Group Publishing
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectStorm movement
dc.subjectLaboratory experiments
dc.subjectSediment transport
dc.subjectSoil-erosion
dc.subjectRunoff
dc.subjectAreas
dc.titleEnhancing the spatial rainfall uniformity of pressurized nozzle simulators
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FMAR%2F04292%2F2013/PT
oaire.citation.endPage31
oaire.citation.issue1
oaire.citation.startPage17
oaire.citation.titleManagement of Environmental Quality
oaire.citation.volume28
oaire.fundingStream5876
person.familyNameIsidoro
person.givenNameJorge
person.identifierR-000-7SY
person.identifier.ciencia-idA617-A962-DE4F
person.identifier.orcid0000-0002-6901-5652
person.identifier.ridN-1814-2015
person.identifier.scopus-author-id55250130500
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccess
rcaap.typearticle
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relation.isAuthorOfPublication.latestForDiscoveryce8b5f4a-f058-4320-b57b-0cb775918b7b
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