TY - JOUR
T1 - Utilização de P-Index em uma bacia hidrográfica através de técnicas de geoprocessamento
AU - Lopes, Fabíola
AU - Merten, Gustavo H.
AU - Franzen, Melissa
AU - Giasson, Elvio
AU - Helfer, Fernanda
AU - Cybis, Luis F A
PY - 2007/6
Y1 - 2007/6
N2 - Due to problems caused by eutrophication of lakes and reservoirs, the identification of phosphorus source areas is important for planning the control of agriculture-related water pollution. This study applied a method designed to identify these phosphorus source areas, called P-Index, which is based on combining data layers related to soil phosphorus availability and phosphorus transport processes. The method was used for studying the Salto Reservoir waterbasin, in São Francisco de Paula, in the State of Rio Grande do Sul, Brazil. Data related to phosphorus availability, intensity of transport processes, and distance to waterways were combined to yield a map of phosphorus contribution classes, which showed that almost the entire study area was considered to have low phosphorus contribution potential. A few small areas, corresponding to potato and garlic fields that received heavy chemical fertilization, were classified as having high phosphorus contribution potentials.
AB - Due to problems caused by eutrophication of lakes and reservoirs, the identification of phosphorus source areas is important for planning the control of agriculture-related water pollution. This study applied a method designed to identify these phosphorus source areas, called P-Index, which is based on combining data layers related to soil phosphorus availability and phosphorus transport processes. The method was used for studying the Salto Reservoir waterbasin, in São Francisco de Paula, in the State of Rio Grande do Sul, Brazil. Data related to phosphorus availability, intensity of transport processes, and distance to waterways were combined to yield a map of phosphorus contribution classes, which showed that almost the entire study area was considered to have low phosphorus contribution potential. A few small areas, corresponding to potato and garlic fields that received heavy chemical fertilization, were classified as having high phosphorus contribution potentials.
KW - Eutrofication
KW - Geographic information system
KW - Land use
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U2 - 10.1590/s1415-43662007000300011
DO - 10.1590/s1415-43662007000300011
M3 - Article
AN - SCOPUS:34548742210
SN - 1415-4366
VL - 11
SP - 312
EP - 317
JO - Revista Brasileira de Engenharia Agricola e Ambiental
JF - Revista Brasileira de Engenharia Agricola e Ambiental
IS - 3
ER -