A virtual discrete rainfall simulator

Valette, Gilles; Prévost, Stéphanie; Léonard, Joël; Lucas, Laurent

doi:10.1016/j.envsoft.2011.10.003

Cited by 3 publications

(1 citation statement)

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“…Although studies under natural conditions are desirable, spatial and temporal distribution of the characteristics of natural rain cannot be controlled and, therefore, data acquisition is slow and difficult. On the other hand, rain simulators have been successfully used in different studies on surface runoff (Pérez-Latorre et al, 2010), soil crusting (Abudi et al, 2012), soil water infiltration (Panachuki et al, 2011) and soil erosion (Valette et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Water erosion and soil water infiltration in different stages of corn development and tillage systems

Carvalho

Eduardo

Almeida

et al. 2015

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThis study evaluated soil and water losses, soil water infiltration and infiltration rate models in soil tillage systems and corn (Zea mays, L.) development stages under simulated rainfall. The treatments were: cultivation along contour lines, cultivation down the slope and exposed soil. Soil losses and infiltration in each treatment were quantified for rains applied using a portable simulator, at 0, 30, 60 and 75 days after planting. Infiltration rates were estimated using the models of Kostiakov-Lewis, Horton and Philip. Based on the obtained results, the combination of effects between soil tillage system and corn development stages reduces soil and water losses. The contour tillage system promoted improvements in soil physical properties, favoring the reduction of erosion in 59.7% (water loss) and 86.6% (soil loss) at 75 days after planting, and the increase in the stable infiltration rate in 223.3%, compared with the exposed soil. Associated to soil cover, contour cultivation reduces soil and water losses, and the former is more influenced by management. Horton model is the most adequate to represent soil water infiltration rate under the evaluated conditions.Erosão hídrica e infiltração de água no solo sob diferentes sistemas de cultivo do milho R E S U M O Neste estudo foram avaliados, sob chuva simulada, perdas de solo e de água, infiltração de água no solo e modelos para a estimativa da taxa de infiltração em sistemas de preparo de solo e fases da cultura do milho (Zea mays, L.). Os tratamentos foram: cultivo em nível, cultivo morro abaixo e solo exposto. A perda de solo e a infiltração em cada tratamento foram quantificadas para chuvas aplicadas por um simulador portátil, aos 0, 30, 60 e 75 dias após o plantio do milho. Na estimativa da taxa de infiltração foram empregados os modelos de Kostiakov-Lewis, Horton e Philip. Com base nos resultados obtidos verifica-se que a combinação de efeitos entre sistema de manejo do solo e fase da cultura do milho reduz as perdas de solo e de água. O sistema de preparo do solo em nível promoveu melhorias nas propriedades físicas do solo favorecendo, aos 75 DAP, redução do processo erosivo em 59,7% (perda de água) e 86,6% (perda de solo) e aumento da taxa de infiltração estável de água no solo em 223,3%, em relação ao tratamento solo exposto. Associado à cobertura do solo, o cultivo em nível reduz as perdas de solo e de água, sendo a primeira mais influenciada pelo manejo. O modelo de Horton é o mais adequado para representar a taxa de infiltração de água no solo nas condições avaliadas.

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