Improved calculation of soil hydraulic conductivity with the simplified evaporation method

Autor(es)

Inforsato, Leonardo ; Iden, Sascha ; Durner, Wolfgang ; Peters, Andre ; van Lier, Quirijn De Jong

• Tipo de documento: Artigo Científico
• Fonte: VADOSE ZONE JOURNAL; v. 22, n. 5, p. 9-pg., 2023-07-25.

Resumo

Numerical modeling of soil water dynamics and storage is generally based on the Richards equation. Its solution requires knowledge of the soil hydraulic properties (SHP): the soil water retention function and the hydraulic conductivity function. To determine SHP, laboratory evaporation experiments are particularly popular because they provide data for both SHP functions. The evaluation by the simplified evaporation method (SEM) method, originally proposed by Schindler and subsequently improved by several authors, relies on linearization assumptions that allow for a relatively simple calculation scheme but result in biased conductivity data for some soils. The objective of this study is to propose and test an improved computational scheme for the hydraulic conductivity function. We present the new theory and show that it leads generally to higher accuracy of the conductivity function. The improvement is most pronounced for sandy soils and soil water pressure heads below -100 cm, where the original method provided data with bias. (AU)

• Processo FAPESP: 18/20902-2 - Desenvolvimento e avaliação funcional de metodologias para a determinação laboratorial das propriedades hidráulicas do solo e sua relação com a disponibilidade de água para as plantas
• Beneficiário: Quirijn de Jong van Lier
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 20/00145-2 - Desenvolvimento de metodologia para obtenção das propriedades hidráulicas do solo assistida por experimento de evaporação em laboratório
• Beneficiário: Leonardo Inforsato
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 21/10520-8 - Avaliação da incerteza da parametrização hidráulica do solo por modelagem inversa de experimentos de evaporação
• Beneficiário: Leonardo Inforsato
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado