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

Meira, Ludmila; Oliveira e Silva, Pedro; Tomaz, Alexandra

dc.date.accessioned	2021-12-06T12:19:40Z
dc.date.available	2021-12-06T12:19:40Z
dc.date.issued	2021-12-06
dc.identifier	doi:10.17170/kobra-202110274964
dc.identifier.uri	http://hdl.handle.net/123456789/13423
dc.language.iso	eng	eng
dc.rights	Namensnennung 4.0 International	*
dc.rights.uri	http://creativecommons.org/licenses/by/4.0/	*
dc.subject	arenosols	eng
dc.subject	ferralsols	eng
dc.subject	multivariate statistical analysis	eng
dc.subject	soil degradation	eng
dc.subject	tropical and subtropical regions	eng
dc.subject.ddc	630
dc.title	Rainfall erosivity, soil erodibility and natural water erosion potential in the Huambo region, Angola	eng
dc.type	Aufsatz
dcterms.abstract	The 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.accessRights	open access
dcterms.creator	Meira, Ludmila
dcterms.creator	Oliveira e Silva, Pedro
dcterms.creator	Tomaz, Alexandra
dc.subject.swd	Angola	ger
dc.subject.swd	Arenosol	ger
dc.subject.swd	Latosol	ger
dc.subject.swd	Statistische Analyse	ger
dc.subject.swd	Degradation	ger
dc.subject.swd	Tropen	ger
dc.subject.swd	Subtropen	ger
dc.subject.swd	Erosion	ger
dc.type.version	publishedVersion
dcterms.source.identifier	eissn:2363-6033
dcterms.source.issue	No. 2
dcterms.source.journal	Journal of Agriculture and Rural Development in the Tropics and Subtropics (JARTS)	eng
dcterms.source.pageinfo	269-278
dcterms.source.volume	Vol. 122
kup.iskup	false