Description of hydrological and erosion processes determined by applying the LISEM model in a rural catchment in southern Brazil

Impacts of forest conversion and agriculture practices on water pathways in Southern Brazil

“…The upper part of the ARC catchment, where ARCsub is located, has a gentle rolling topography. The soils are deep (>4 m) and classified as Acrisols (Figure c—Barros, Minella, Dalbianco, & Ramon, ). The slope range in the ARC catchment is 0.03–58°, but it is only of 0.1–21° in the ARCsub catchment.…”

“…The soils on these slopes are shallower (0.01 to 1.55 m) and mainly consist of Leptosols. Cambisols are found in limited parts of the ARCs (Barros et al, ). The soils under both forest and agriculture are also not in direct contact with the bedrock as there is a thick layer of saprolite at the soil–bedrock interface (Figure ).…”

Combining visible-based-color parameters and geochemical tracers to improve sediment source discrimination and apportionment

“…The soil types in the catchment according to the World Reference Base for Soil Resources (WRB) (IUSS Working Group WRB, 2006) determined from a detailed soil classification survey (1:5000) are Acrisols (57%), Cambisols (33%) and Leptosols (10%). The use and soil management are characterized by the cultivation of tobacco in minimum cultivation (23%), the cultivation of tobacco in the conventional system with plowing (17%), the native forest (20%), afforestation with eucalyptus (23%), grassland (7%), rural facilities (3%), water reservoirs (1%), and regenerating forest (6%) (Barros et al, 2014).…”

Establishing a sediment budget for a small agricultural catchment in southern Brazil, to support the development of effective sediment management strategies

“…This factor was based on existing understanding of the physical controls on connectivity documented by Walling and Zhang (2004) and other researchers and evidence available from distributed erosion and sediment delivery modelling studies and other investigations undertaken in the study catchment (e.g. Useika et al, 2012;Barros et al, 2014;Mello, 2006;Oliveira et al, 2012). On the basis of these calculations, the net soil loss from the fields of 427 t yr À1 (Table 3) was estimated to provide inputs of 148 t yr À1 to the stream channel and 94 t yr À1 to the valley floor sinks, with an associated conveyance loss of 162 t yr À1 and a further loss of 33 t yr À1 to unconnected areas, representing a total loss of 195 t yr À1 .…”