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Publicação
Field-scale assessment of soil water dynamics using distributed modeling and electromagnetic conductivity imaging
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Orientador(es)
Resumo(s)
Knowledge of the soil water balance is fundamental for improving crop water use in agricultural fields. Estimates
are normally for representative and homogeneous areas where the variability of soil properties is neglected.
However, this variability significantly impacts soil water dynamics at the field scale. In this study, the MOHIDLand
distributed process-based model was used to compute the spatially explicit soil water dynamics in a 22.6-ha
almond field located in southern Portugal. An electromagnetic induction survey was first performed to obtain
electromagnetic images of the real soil conductivity in depth, which were related to soil texture. Then, pedotransfer
functions were used to convert soil texture into soil hydraulic data. MOHID-Land results included maps
of the spatial distribution of soil water contents, actual crop transpiration, actual soil evaporation, percolation
below the rootzone, and surface runoff. These allowed identifying preferential flow pathways as well as the main
control factors influencing soil water dynamics at the field scale. Some development needs were identified, and
overcoming them would enhance the significance of contributions such as this study to the field of precision
agriculture.
Descrição
Palavras-chave
Irrigation water management Pedotransfer functions Soil water balance Soil variability Three-dimensional modeling
Contexto Educativo
Citação
Ramos, Tiago B., et al. “Field-Scale Assessment of Soil Water Dynamics Using Distributed Modeling and Electromagnetic Conductivity Imaging.” Agricultural Water Management, vol. 288, Oct. 2023, p. 108472
Editora
Elsevier