
handle: 10183/248298
A água constitui importante vetor de transporte de poluentes. Em áreas agrícolas a ocorrência de chuvas intensas gera a percolação da água no perfil do solo, provocando a lixiviação de espécies químicas. A estrutura do solo condiciona a evolução temporal das concentrações na água de drenagem, podendo variar em função do tipo de solo. O objetivo deste estudo foi avaliar a influência da intensidade da chuva no transporte de cátions em dois tipos de solos, Latossolo e Cambissolo, sob diferentes tipos de uso. Foram utilizados lisímetros volumétricos de drenagem para simulação do escoamento de drenagem no perfil do solo e simulador de chuva para produção de chuvas com diferentes intensidades. O escoamento de drenagem foi medido e amostras de água foram coletadas para determinação dos cátions NH4+, Ca2+, Mg2+, K+ e Na+. Os resultados mostraram que a diferença de intensidade não se constituiu em fator determinante para o transporte de solutos no solo. Para os íons Ca2+, Mg2+ e Na+ o fator determinante para o transporte esteve relacionado ao manejo do solo.
The water constitutes an important vector of transport of pollutants. In agricultural areas the occurrence of heavy rainfall raises the water percolation in the soil profile, causing leaching of chemical species. The structure determines the time evolution of the drainage water and may vary depending on the type of soil. This study aimed evaluated the influence of rain intensity in the transport of cations in a Latosol and a Cambisol, with different types of land use. Drainage volumetric lysimeters were used to simulate the drainage flow in the soil profile and a rain simulator to produce rains with different intensities. The drainage flow was measured and water samples were collected to determinate the concentration of the cations NH4+, Ca2+, Mg2+, K+ and Na+. The results showed that the intensity difference does not constitute a determining factor for the transport of solutes in soil. For Ca2 +, Mg 2+ and Na + the determining factor for the transport was the soil management.
Chuva : Simulacao, Manejo do solo, Agricultural land, Degradação ambiental, Poluentes : Transporte, Soil pollutants, Uso do solo, Environmental degradation
Chuva : Simulacao, Manejo do solo, Agricultural land, Degradação ambiental, Poluentes : Transporte, Soil pollutants, Uso do solo, Environmental degradation
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