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water balance model

Catalogue: GRDC Updates
Given the importance of soil evaporation in influencing how much water will be stored during a fallow and its potential to vary with climate, soils and land management practices, it is timely (within the scope of this project) to assess the way in which we are accounting for these losses in our models.. The large difference in the number of simulations run for each model can be attributed to the physical nature of SWIM. SWIM requires a hydraulic gradient in order to move water between layers, so for soils that are at or above DUL this gradient is very low and SWIM can have difficulty finding a solution... Overall, both models are acceptable for modelling soil evaporation over a range of soils and seasons provided accurate soil physical properties and starting water states are known...
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Catalogue: GRDC 2014 Research Summaries
The system will use existing water-balance simulation models, online climate (BoM) and soils (e.g. APSOIL/SoilMapp) information and be informed by local rainfall and soil observations... Industry forums will be conducted and focus groups involving growers and advisors from each grain region will be engaged during development of the system to provide feedback and evaluation... Once the prototype system is developed, historical datasets and field trials undertaken on a range of soils and in each of the main grain-growing regions will be used to verify the accuracy of the system developed...
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