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Impacts of distinct spatial arrangements of impervious surfaces on runoff and sediment fluxes from laboratory experiments

2019-12Journal article Restricted
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dc.contributor.authorFerreira, C. S. S.
dc.contributor.authorMoruzzi, R.
dc.contributor.authorIsidoro, Jorge M. G. P.
dc.contributor.authorTudor, M.
dc.contributor.authorVargas, M.
dc.contributor.authorFerreira, A. J. D.
dc.contributor.authorde Lima, J. L. M. P.
dc.date.accessioned2020-07-24T10:50:49Z
dc.date.available2020-07-24T10:50:49Z
dc.date.issued2019-12
dc.description.abstractUrbanization affects runoff processes and sediment transport, but the magnitude of the impacts remains poorly understood. Different spatial patterns of pervious and impervious surfaces influence flow and sediment connectivity between hillslopes and stream networks. Following years of research on the peri-urbanizing Ribeira dos Covoes catchment in Portugal, this study uses laboratory rainfall simulation experiments to better assess the impact of soil and pavement patterns on runoff (amount, runoff start and stop times) and sediment transport. Based on urban cores observed in the study catchment, the investigation focused on seven spatial patterns: bare soil (S), 100% pavement (P), and 60% pavement under continuous - C - surface placed upslope (CU) and downslope (CD), and dispersed - D - over the surface with regular (DR), irregular (DI) and linear (DL) distribution. A 1.00 m x 1.00 m flume, 0.05 m deep with a 9 degrees slope, facilitated the experiments. The study used sandy-loam soil (1500 kg m(-3)) with concrete slabs representing pavement. Each experiment comprised a series of four rainfall simulations, each lasting 20 min (50 mm h(-1)), separated by 30-min intervals, to assess the impact of different initial soil moisture conditions. Results indicate that both spatial pattern and soil moisture drive runoff. Under dry conditions, CD provides runoff that is 7 times faster and about 4% higher than that for CU. Already wet conditions, however, produced 12% more runoff on CU than on CD. The greater runoff arose from faster soil saturation, driven by soil moisture increasing more quickly during the rainfall, as well as upstream runoff from paved surfaces, though runoff took longer to reach the outlet. The dispersed pavement pattern only affected runoff amount, with DL producing the highest coefficients (40-71%) and DI the lowest (25-55%), since longer flow paths increase the opportunities for water infiltration. Additionally, CU yielded 40% more sediment transport than CD, but the three dispersed patterns did not show a significant impact (p > 0.05). The results suggest that appropriate planning can reduce flood hazard and land degradation in urban areas, in particular by using dispersed patterns of sealed surfaces to enhance water infiltration and retention. (C) 2019 Elsevier Ltd. All rights reserved.
dc.description.sponsorshipPortuguese Foundation for Science and Technology (FCT), through research project HIRT -Modeling of surface hydrological processes based on infrared thermography at the local and plot scales [PTDC/ECM-HID/4259/2014, UID/MAR/04292/2013, SFRH/BPD/120093/2016]
dc.description.sponsorshipInternational Mobility Programme of Universidade Estadual Paulista, UNESP [03/2017 PROPG PAREex]
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1016/j.ancene.2019.100219
dc.identifier.issn2213-3054
dc.identifier.urihttp://hdl.handle.net/10400.1/14159
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.subjectSoil-moisture dynamics
dc.subjectOverland-flow
dc.subjectLand uses
dc.subjectUrbanization
dc.subjectWater
dc.subjectManagement
dc.subjectCatchment
dc.subjectErosion
dc.subjectClimate
dc.subjectArea
dc.subjectPeri-urban landscape
dc.subjectSpatial pattern of pavement
dc.subjectRunoff
dc.subjectSediment yield
dc.subjectDry and wet conditions
dc.titleImpacts of distinct spatial arrangements of impervious surfaces on runoff and sediment fluxes from laboratory experiments
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FMAR%2F04292%2F2013/PT
oaire.citation.startPageUNSP 100219
oaire.citation.titleAnthropocene
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.isProjectOfPublicationb84cb732-8d6b-43ff-974b-01c29a129290
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