Rainfall erosivity, soil erodibility and natural water erosion potential in the Huambo region, Angola

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dc.date.accessioned2021-12-06T12:19:40Z
dc.date.available2021-12-06T12:19:40Z
dc.date.issued2021-12-06
dc.identifierdoi:10.17170/kobra-202110274964
dc.identifier.urihttp://hdl.handle.net/123456789/13423
dc.language.isoengeng
dc.rightsNamensnennung 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectarenosolseng
dc.subjectferralsolseng
dc.subjectmultivariate statistical analysiseng
dc.subjectsoil degradationeng
dc.subjecttropical and subtropical regionseng
dc.subject.ddc630
dc.subject.swdAngolager
dc.subject.swdArenosolger
dc.subject.swdLatosolger
dc.subject.swdStatistische Analyseger
dc.subject.swdDegradationger
dc.subject.swdTropenger
dc.subject.swdSubtropenger
dc.subject.swdErosionger
dc.titleRainfall erosivity, soil erodibility and natural water erosion potential in the Huambo region, Angolaeng
dc.typeAufsatz
dc.type.versionpublishedVersion
dcterms.abstractThe use of erosion assessment methods is critical for the sustainability of land use in tropical and subtropical regions, especially in countries lacking national information on soil erosion development, which is the case of Angola. This study aimed to evaluate the rainfall erosivity (R), soil erodibility (K), soil loss tolerance (T) and natural erosion potential (NEP) in Huambo (Angola). The R value estimated for a 25-year period was 7463 MJ·mm·ha-¹·h-¹·y-¹. K values estimated from 25 soil profiles, described in the Soil Map of Angola, varied from 0.021 to 0.247 t·ha·h·ha-1·MJ-¹·mm-¹, respectively, in yellow ferralitic and paraferralitic soils (Ferralsols) and brown psamitic soils (Arenosols). A two-principal component (PC) model for soil erodibility variables explained 61.7% of total variance. PC1 was related to particle size distribution and soil erodibility, pointing to a positive correlation between sand content in the soil superficial horizons and K. PC2 expressed soil loss vulnerability, with negative factor loading for soil loss tolerance. The cluster analysis (CA) grouped Arenosols in a significant cluster located in the positive quadrant of PC1, therefore, more erosion prone. The NEP average value found was of 605 t·ha-¹·y-¹. The obtained results raise awareness concerning soil degradation by water erosion and can be of value for decision-makers and for farmers and land users, contributing to the sustainability of agriculture in Huambo.eng
dcterms.accessRightsopen access
dcterms.creatorMeira, Ludmila
dcterms.creatorOliveira e Silva, Pedro
dcterms.creatorTomaz, Alexandra
dcterms.source.identifiereissn:2363-6033
dcterms.source.issueNo. 2
dcterms.source.journalJournal of Agriculture and Rural Development in the Tropics and Subtropics (JARTS)eng
dcterms.source.pageinfo269-278
dcterms.source.volumeVol. 122
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Vol 122, No 2 (2021)