Soil erosion determination in a watershed from northern Parana (Brazil) using (CS)-C-137

摘要

The objective of this work was study the soil losses or gains in a watershed in the Municipal district of Cambe, Parana using Cs-137 as marker for the determination of soil redistributions. A transect sampling, was used to evaluate the influence of different tillage on soil erosion. One point, located in a forest area was sampled and analyzed to determine the reference inventory of cesium-137 deposited by fallout. The average value of the reference inventory was 292 Bq m(-2). The cesium-137 inventory of the transect samples varied from 80 Bq m(-2) to 403 Bq m(-2). The sampling points in pasture presented soil losses. The sampling points in coffee plantation did not present losses or gains. The sampling points in soybean cultivated areas presented soil losses. [References: 25]