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| Bastiaanssen, W.G.M.; Allen, R.G.; Droogers, P.; D’Urso, G.; Steduto, P.. |
| Half of the world food production originates from irrigated and drained soils. However, the future management of these systems must accept the paradigm shift away from managing abundant water supplies (with focus on conveyance and distribution) and toward the beneficial use of scarce water resources with the emphasis on deficit irrigation, sustainable groundwater exploitation and optimized crop water productivity. Mechanistic computer models – together with economic and social decision rules – have a key role to play in supporting water allocation decisions. Unfortunately, computer models for prediction and better understanding of unsaturated soil water flow processes have low operational focus, especially in many irrigation countries where they are most... |
| Tipo: Conference proceedings |
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| Ano: 2005 |
URL: http://library.wur.nl/ojs/index.php/frontis/article/view/900 |
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| Menenti, M.; Jia, L.; Bastiaanssen, W.G.M.. |
| This paper summarizes basic concepts and definitions in models of the SVA system and then emphasizes inconsistencies between model variables and observations for the soil, vegetation and atmosphere elements. This is done first in a qualitative sense, then analytically for the observations of the radiometric temperature of vegetation canopies. Notwithstanding the significant efforts dedicated to systematic comparison of models and to performing complex experiments to construct a rich data base for model validation, the inter-model variability of predicted fluxes and state variables remains large and it is hard to pin-point specific causes. The argument developed in this paper is that a different avenue should be explored in search of a solution, namely an... |
| Tipo: Conference proceedings |
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| Ano: 2005 |
URL: http://library.wur.nl/ojs/index.php/frontis/article/view/898 |
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