Using 137Cs and 210Pbex measurements to estimate soil redistribution rates on semi-arid grassland in Mongolia

Soil erosion rates on forested mountain hillslopes estimated using 137Cs and 210Pbex

“…Comparison with previous erosion studies that examined radionuclides at sites with other conditions (e.g., Martinez et al, 2009;Kato et al, 2010) suggested that these spatial patterns may be specific to Japanese cypress stands (e.g., Martinez et al, 2009;Kato et al, 2010). For instance, Martinez et al (2009) found no relationship between 137 Cs inventories and slope position in native grasslands in the Krui River catchment in Australia.…”

“…For instance, Martinez et al (2009) found no relationship between 137 Cs inventories and slope position in native grasslands in the Krui River catchment in Australia. By contrast, Kato et al (2010) reported that 137 Cs inventories tended to decrease with down-slope distance in grasslands in Mongolia. Our contrasting results suggest that specific soil erosion processes may exist in Japanese cypress stands.…”

“…Although temporal patterns of 210 Pb ex fallout differ from those of 137 Cs, it is probable that the distribution of 210 Pb ex is affected by the same processes as 137 Cs . Although previous authors have used 210 Pb ex , mainly to estimate soil erosion in cultivated lands (e.g., Walling and He, 1999b;Walling et al, 2003;Zhang et al, 2006), recent studies have increasingly shown that combinations of 210 Pb ex and 137 Cs provide information on soil erosion processes under various conditions (e.g., Blake et al, 2009;Kato et al, 2010).…”

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

“…showed and exponential decrease with depth and the shape of the 137 For the 76 bulk soil cores sampled at the point sites, the 137 Cs activities and inventories 321 (Table 2) especially in semiarid landscapes (Kato et al, 2010). 325…”

Diffusion and Transportation Dynamics of 137Cs Deposited on the Forested Area in Fukushima After the Fukushima Daiichi Nuclear Power Plant Accident in March 2011

“…The fi rst phase of government surveys and investigations showed that the major portion of deposited 137 Cs was trapped in the canopy and litter layer at the soil surface (Hashimoto et al 2012 ;MEXT and MAFF 2012 ). 137 Cs has been shown to be easily adsorbed onto clay minerals and soil organic matter (Kruyts and Delvaux 2002 ), which can be transported by eroded soils and particulate and dissolved organic matter through hydrological channels, streams, and rivers (Fukuyama et al 2005 ;Kato et al 2010 ;Wakiyama et al 2010 ). Dissolved 137 Cs, which is relatively free from soil adsorption, can also be taken up by microbes, algae, and plants in soil and aquatic systems.…”