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Impact of Land-Use ...
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Ferreira, C. S. S.
(författare)
Impact of Land-Use Changes on Spatiotemporal Suspended Sediment Dynamics within a Peri-Urban Catchment
- Artikel/kapitelEngelska2020
Förlag, utgivningsår, omfång ...
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2020-03-01
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MDPI AG,2020
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printrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:su-181770
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https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-181770URI
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https://doi.org/10.3390/w12030665DOI
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-288300URI
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Språk:engelska
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Sammanfattning på:engelska
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Klassifikation
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
Anmärkningar
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QC 20210112
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Understanding sediment dynamics in peri-urban catchments constitutes a research challenge because of the spatiotemporal complexity and variability of land-uses involved. This study investigates differences in the concentration of total sediments (TSC) and suspended sediments (SSC) in the small peri-urban Mediterranean Ribeira dos Covoes catchment (40% urban area) in central Portugal. Suspended sediment responses at the catchment outlet (E) and in three upstream sub-catchments, during periods of urbanization (2011-2013) and stabilizing land-use (2017-2018) are compared for storm-event datasets encompassing similar ranges of rainstorm sizes and antecedent rainfall condition. The Quinta sub-catchment, with the lowest urban area (22%) but subject to major construction activities affecting 17% of its area, led to highest TSC and SSC during urbanization (attaining 4320 mg/L and 4184 mg/L, respectively), and a median reduction of 38% and 69%, respectively, during stabilization. Espirito Santo sub-catchment, with highest urban area (49%) and minor construction activities, displayed similar median TSC in both periods (258-240 mg/L) but highest SSC reduction (76%), highlighting the impact of the anthropogenic disturbance mainly on fine-particle sediments and a good connectivity with the stream. Porto Bordalo sub-catchment, with 39% urban area and subject to the construction of a four-line road covering 1.5% of its area, showed the lowest TSC and SSC concentrations and the lowest median reductions in both periods (31% and 64%, correspondingly), mainly because of the impact of an unplanned retention basin established with soil from the construction site. Overall, median TSC and SSC reduced 14% and 59% at E, from urbanization to stabilization. Information about sediment dynamics should guide stakeholders in establishing strategies to reduce sediment loads and mitigate the impacts on urban aquatic ecosystems.
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Walsh, R. P. D.
(författare)
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Kalantari, ZahraStockholms universitet,Institutionen för naturgeografi(Swepub:kth)u1dxr4oj
(författare)
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Ferreira, A. J. D.
(författare)
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Stockholms universitetInstitutionen för naturgeografi
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Water: MDPI AG12:32073-4441
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Water
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