000			03423nab a2200301 i 4500
003			BR-BrBNA
005			20250325210629.0
008			250325b2020 bl.ar|pooa||| 00| 0 eng |
040			_aBR-BrBNA _beng
072			_aP36
100			_aBispo, Diêgo Faustolo Alves
100			_aBatista, Pedro Velloso Gomes
100			_aGuimarães, Danielle Vieira
100			_aSilva, Marx Leandro Naves
100			_aCuri, Nilton
100			_aQuinton, John Norman
245			_aMonitoring land use impacts on sediment production: a case study of the pilot catchment from the Brazilian program of payment for environmental services
500			_aPublicação on-line; 37 ref.; 5 illus; 3 tables; Sumaries (En)
520			_a ABSTRACT: Through the lack or non-use of conservationist criteria for adequate land use and management, the scarcity of natural resources becomes ever more evident. This study aimed to analyze the origin of the sediments in the Posses catchment, municipality of Extrema, state of Minas Gerais, Brazil, throughout the fingerprinting technique and portable X-ray fluorescence. Samples from soils under agriculture, pasture, and roads; and from the subsoil of theses land uses were taken in a widespread and representative manner from the entire Posses catchment. Lag deposits and river bed sediment samples were collected downstream from the catchment outlet. A total of 45 geochemical elements were analyzed in the samples by a portable X-ray fluorescence device (pXRF). The outlier test, Kruskal-Wallis test, multivariate discriminant analysis, and a mixing model were used to estimate the contribution of each source in relation to the sediments that arrive at the mouth of the catchment. The elements selected as geochemical tracers were Sr, Al2O3, Ba, Rb, Ti, Fe, and Zn, which combined correctly discriminated 81 % of the sediment sources. The largest and smallest proportion of sediment from the Posses catchment outlet comes from rural roads and agriculture, respectively. The contribution of the subsoil was higher for lag deposits or lower for river bed sediments, than the pasture. There was a low degree of uncertainty (<8 %) for predictions made by the model employed. The types of use, selected as potential sediment sources in the Posses catchment, are adequately discriminated through the geochemical tracers quantified through the pXRF. The fingerprinting technique estimates that the contributions to outlet sediments are dominated by rural roads, following by subsoil or pasture (depending on the type of sediment evaluated) and by agriculture. The sediment sampling strategies used in this study provided similar results for the period studied. Our results showed the potential of the fingerprinting technique and the pXRF for use as tools by the program of Payment for Environmental Services in the monitoring of catchment areas. Keywords: fingerprinting, soil erosion, rural roads, ecosystem service.
650			_aBACIA HIDROGRÁFICA
650			_aEROSÃO DO SOLO
650			_aSEDIMENTO
650			_aANÁLISE DO SOLO
773	0		_0808 _9345421 _dViçosa-MG Sociedade Brasileira de Ciência do Solo 1977 _o2024-5955 _tRevista Brasileira de Ciência do Solo (Brazil) _x0100-0683 _gv. 44 p. 1-15; (2020) _wBR2024004998
856			_uhttps://www.scielo.br/j/rbcs/a/zMNsXy4v8rF8BRNWFtyx3TQ/?format=pdf&lang=en
942			_cANA
999			_c330657 _d330657