Linear erosion in mountain scrublands of North and Centre Portugal: the case studies of Seirós and Corgo gullies

Martins, Bruno; Lourenço, Luciano; Fonseca, Felícia; Figueiredo, Tomás de; Ferreira, Carmen

Publication

Linear erosion in mountain scrublands of North and Centre Portugal: the case studies of Seirós and Corgo gullies

2016Conference object

dc.contributor.author	Martins, Bruno
dc.contributor.author	Lourenço, Luciano
dc.contributor.author	Fonseca, Felícia
dc.contributor.author	Figueiredo, Tomás de
dc.contributor.author	Ferreira, Carmen
dc.date.accessioned	2018-02-22T10:25:25Z
dc.date.available	2018-02-22T10:25:25Z
dc.date.issued	2016
dc.description.abstract	Gully occurrence is particularly common in the mountain areas of North and Central Portugal, dominantly covered by forests and scrublands. In many of these regions, linear erosion is a very important process, contributing to significant soil loss and land degradation. In rural areas, land degradation may be responsible for limiting the options for territory occupation and development, reducing farmland quality and suitable area. Driven by climatic conditions as long and intense rainfalls, gully formation is related to topographical factors such as hill‐slope gradient, length and shape, to physical, chemical and mineralogical properties of the soils. The variety of physical factors associated with gully formation hinders straightforward interpretations and requires well grounded analysis based on local observation. Also, anthropogenic factors significantly contribute to gully formation and development and for the associated soil loss rates. Deforestation, forest fires, overgrazing, vegetation removal, as well as road building, are the most important ones. In most cases, they reduce infiltration and promote runoff water concentration. Two case studies are presented in this paper, aiming at discussing interpretations on gully formation factors and their contribution to soil loss. Both correspond to scrubland over colluvial hillslope deposits, located in Seirós (Ribeira de Pena, Northern Portugal) and Corgo (Oliveira do Hospital, Central Portugal). Field surveys were performed to assess gully volume and the corresponding soil loss by linear erosion, consisting in measurements of cross‐sectional area at regular intervals along the gully, and their integration up to gully cross‐sections with less than 900 cm2 area. Samples were taken on gully walls for bulk density (100 cm3 cylinders). Field surveys also allow the collection of samples for granulometric analysis in the tentative to assert relationship to the gullies geometry and understanding the most significant driven factors in gullies formation.	pt_PT
dc.description.version	info:eu-repo/semantics/publishedVersion	pt_PT
dc.identifier.citation	Martins, Bruno; Lourenço, Luciano; Fonseca, Felícia; Figueiredo, Tomás de; Ferreira, Cármen (2016). Linear erosion in mountain scrublands of North and Centre Portugal: the case studies of Seirós and Corgo gullies. In Mountains 2016: I Conferência Internacional sobre Investigação e Desenvolvimento Sustentável em Regiões de Montanha. Bragança: Instituto Politécnico. ISBN 978‐972‐745‐214‐9	pt_PT
dc.identifier.isbn	978‐972‐745‐214‐9
dc.identifier.uri	http://hdl.handle.net/10198/15914
dc.language.iso	eng	pt_PT
dc.peerreviewed	yes	pt_PT
dc.publisher	Instituto Politécnico de Bragana	pt_PT
dc.rights.uri	http://creativecommons.org/licenses/by/4.0/	pt_PT
dc.title	Linear erosion in mountain scrublands of North and Centre Portugal: the case studies of Seirós and Corgo gullies	pt_PT
dc.type	conference object
dspace.entity.type	Publication
oaire.citation.conferencePlace	Instituto Politécnico de Bragança, Portugal.	pt_PT
oaire.citation.title	I Conferência Internacional sobre Investigação e Desenvolvimento Sustentável em Regiões de Montanha	pt_PT
person.familyName	Fonseca
person.familyName	Figueiredo
person.givenName	Felícia
person.givenName	Tomás d'Aquino
person.identifier	1297327
person.identifier.ciencia-id	961D-607D-51CC
person.identifier.orcid	0000-0001-7727-071X
person.identifier.orcid	0000-0001-7690-8996
person.identifier.scopus-author-id	36970960500
person.identifier.scopus-author-id	54790554500
rcaap.rights	openAccess	pt_PT
rcaap.type	conferenceObject	pt_PT
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