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Ferramenta de Avaliação E Planeamento HÃdrico
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ISBN10: 6630109600
ISBN13: 9786630109603
Publisher: Edicoes Nosso Conhecimento
Published: Jun 27 2026
Pages: 100
Weight: 0.32
Height: 0.24 Width: 6.00 Depth: 9.00
Language: Portuguese
ISBN13: 9786630109603
Publisher: Edicoes Nosso Conhecimento
Published: Jun 27 2026
Pages: 100
Weight: 0.32
Height: 0.24 Width: 6.00 Depth: 9.00
Language: Portuguese
A água é fundamental para o cultivo do arroz, sendo que as necessidades totais de água dependem da evapotranspiração (ETc), da infiltração e da percolação. Estes fatores variam consoante o tipo de solo, a fase de crescimento da cultura e as condições climáticas nos diversos ambientes agroecológicos. Este estudo estima as necessidades hÃdricas da cultura e de irrigação no distrito de Raipur, em Chhattisgarh, utilizando o método MABIA no software WEAP. O método, baseado no coeficiente duplo de cultura, simula a evapotranspiração diária. As diretrizes da FAO e a fórmula do irrigador determinam as necessidades de irrigação, enquanto o ArcGIS gera mapas de irrigação por blocos. Os resultados mostram que as necessidades hÃdricas da cultura do arroz variam entre 648,66 mm e 847,87 mm na estação Kharif, com necessidades de irrigação entre 1,23,193 MCM e 2,57,533 MCM, dependendo da área agrÃcola. Uma estimativa precisa evita o murchamento das culturas ou a perda excessiva de água. Os resultados do modelo WEAP, validados em relação aos dados observados, apresentam um desvio de apenas 2,5%, o que confirma a sua fiabilidade. Este estudo contribui para a otimização do uso da água, visando melhorar a produção de arroz.
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