Assessing soil erosion in a Pyrenean mountain catchment using GIS and fallout 137Cs

Assessing soil redistribution in a complex karst catchment using fallout 137Cs and GIS

“…Soils atdeposition sites and cultivated sites had longer 137 Cs profiles and 200 therefore the sampling depth was extended to 60 cm to collect the entire 137 In the laboratory, soil samples were air-dried, ground, homogenized, and quartered, 212 before being passed through a 2-mm sieve. Details on the methods used in the analysis 213 of 137 Cs were described by Navas et al (2005). Radionuclide activity in the soil samples 214 was measured using a high resolution, low background, low energy, hyperpure coaxial 215 gamma-ray detector coupled to an amplifier and multichannel analyser.…”

Reconstructing the history of sediment accumulation in the Yesa reservoir: an approach for management of mountain reservoirs

“…In some sectors at the headwaters of the Aragón river basin the erosive processes are especially intense (Navas et al , 2005a(Navas et al , 2005b; therefore, the loads of sediments transported and deposited in the Yesa reservoir are expected to affect both water quantity and quality. Furthermore, plans to double the initial water storage capacity of the reservoir are very advanced, and in this context sediment supply should be studied because it affects the rational use and sustainability of water resources (Sundborg and Rapp 1986).…”

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

“…Las tasas de redistribución de suelo fueron calculadas en cada uno de los puntos y se compararon con los inventarios de referencia de Cs 137 , los cuales corresponden con valores promedio para el periodo comprendido entre 1963 (inicio de la precipitación de Cs 137 en la región) y 2003 (momento de la toma de muestras y análisis del radioisótopo). Remitimos al lector interesado a consultar el artículo de Navas et al (2005) donde se presentan el análisis e interpretación detallados de los datos de Cs 137 .…”