Soil erosion evaluation in a small basin through the use of 137Cs technique

Inventories and concentration profiles of 137Cs in undisturbed soils in the northeast of Buenos Aires Province, Argentina

“…This parameter was estimated as the sum of each soil slide contribution, considering the product of the activity, the thickness and a bulk density of 1.1 g cm À3 (Hurtado et al, 2006a (Bujan et al, 2000(Bujan et al, , 2003. At the same south latitudinal band (30 e40 ) and in central region of Argentina, San Luis Province, the evaluated local inventory ranged from 745 Bq/m 2 to 1877 Bq/m 2 (Juri Ayub et al, 2007, 2008.…”

“…3a to those determined in central region of Argentina (Juri Ayub et al, 2007, 2008Bujan et al, 2000Bujan et al, , 2003, Chile (Schuller et al, 1997(Schuller et al, , 2004 and from Brazil presented as open squares (Correchel et al, 2005;Handl et al, 2008) are also included. The circles correspond to data from Argentina (solid symbols: present work, open ones: Juri Ayub et al, 2007Ayub et al, , 2008Bujan et al, 2000Bujan et al, , 2003. In the figure, a) the solid line represents the UNSCEAR predictions (UNSCEAR, 2008).…”

“…Furthermore, 137 Cs soil profiles have been determined in the Pampa Ondulada region of Buenos Aires Province, Argentina (Bujan et al, 2000(Bujan et al, , 2003 and in natural and semi-natural grassland areas of San Luis Province (Juri Ayub et al, 2007, 2008.…”

Radiological Survey in Soil of South America

“…Samples of soils were also studied in different departments of Uruguay since 2004 to determine the activity concentrations of 40 K, 226 Ra and 232 Th up to 5 cm of depth [Odino Moure, 2010]. Regarding the anthropogenic nuclides, in Argentina 137 Cs reference activity profile was determined in the Pampa Ondulada region [Bujan et al, 2000[Bujan et al, , 2003 and in the central part of the country in natural and semi-natural grassland regions [Juri Ayub et al, 2007. Beside the natural chains values, the profiles of 137 Cs in the region of Buenos Aires Province have been settled [Montes et al 2010a[Montes et al , 2010b.…”

Modelización espacialmente distribuida de la erosión y el transporte de sedimento en cuencas de montaña del Pirineo aragonés: retos para la calibración y validación

“…El uso de radioisótopos ha sido objeto de un creciente interés como un enfoque alternativo al análisis de la erosión del suelo, y se ha aplicado con éxito en una amplia gama de entornos (p. ej., Ritchie y McHenry, 1990;Walling y Quine, 1991;Walling y He, 1999;Collins et al, 2001;Navas, 2002;Bujan et al, 2003). Las estimaciones de tasas de redistribución del suelo a partir de inventarios de Cs 137 se relacionan con una superficie pequeña en la que se obtiene la muestra de suelo (normalmente unos pocos dm 2 ), y se toman a menudo como estimaciones puntuales cuando se considera a escala de cuenca.…”