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Reflections on GEOtop, NewAge and other modeling

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<ul><li> 1. GEOtop, NewAge and Beyond Montpellier, October 21, 2011 Cezanne, Pine Tree near Aix R. Rigon, G. FormettaMonday, October 24, 11 </li> <li> 2. Introduction The good old Hydrological cycle 2 Rigon et al., Montpellier, October 21, 2011Monday, October 24, 11 </li> <li> 3. Introduction Every Hydrologist would like to have THE MODEL of IT But in reality everybody wants just to investigate a limited set of phenomena: for instance the discharge in a river. Or landsliding , or soil moisture distribution. Any problems requires its amount of prior information to be solved: some problems needs more detailed information of others 3 Rigon et al., Montpellier, October 21, 2011Monday, October 24, 11 </li> <li> 4. Introduction So we use different models 4 Rigon et al., Montpellier, October 21, 2011Monday, October 24, 11 </li> <li> 5. Introduction So we use different models GEOtop Fully distributed Grid based 4 Rigon et al., Montpellier, October 21, 2011Monday, October 24, 11 </li> <li> 6. Introduction So we use different models GEOtop NewAge Anthropic Infrastructures Fully distributed Large scale modelling Hillslope - Stream Grid based 4 Rigon et al., Montpellier, October 21, 2011Monday, October 24, 11 </li> <li> 7. IntroductionMonday, October 24, 11 Fully distributed Grid based GEOtop Large scale modelling Hillslope - Stream Anthropic Infrastructures Rigon et al., Montpellier, October 21, 2011 NewAge Fully Coupled Subsurface- Surface Grid Based Boussinesq So we use different models 4 </li> <li> 8. IntroductionMonday, October 24, 11 Fully distributed Grid based GEOtop Large scale modelling Hillslope - Stream Anthropic Infrastructures Rigon et al., Montpellier, October 21, 2011 NewAge Fully Coupled Subsurface- Surface Grid Based Boussinesq So we use different models GIUH Peak floods PeakFlow 4 </li> <li> 9. Introduction So we use different models GEOtop NewAge Boussinesq PeakFlow Anthropic Infrastructures Subsurface- Surface Fully distributed Peak floods Large scale modelling Fully Coupled Hillslope - Stream Grid based GIUH Grid Based The complexity arrow 4 Rigon et al., Montpellier, October 21, 2011Monday, October 24, 11 </li> <li> 10. Introduction Every one of them: Perform the mass budget (and preserves mass) Make hypotheses on momentum variations Simplify the energy conservation (and its dissipation) to a certain degree (Implicitly delineates a way to entropy increase) 5 Rigon et al., Montpellier, October 21, 2011Monday, October 24, 11 </li> <li> 11. Questions A first question: How can we manage the set of activities behind all of this modeling ? (-; doing the models using sound science, modern informatics, validating them against data, assessing their uncertainty ;-) Without reinventing the wheel any time 6 Rigon et al., Montpellier, October 21, 2011Monday, October 24, 11 </li> <li> 12. GEOtop GEOtop (Rigon et al., Jour. Hydromet., 2006) This model focuses on the water and energy budgets at few square meters scale with the goal of describing catchment hydrology including (a reasonable parameterization) all known processes. (Whatever this means) 7 Rigon et al., Montpellier, October 21, 2011Monday, October 24, 11 </li> <li> 13. Remarks We are aware that: You cannot deny that our universe is not a chaos; we discern in it beings, things, stuff that we name with words. These beings or things are forms, structures endowed with a certain stability; they fill a certain portion of space and perdure for a certain time ... R. Thom, Structural stabity and morphogenesys,1975 And therefore a fully reductionist approach is stupid. However facing with the fundamental law teaches us many thing about the reduction of complexity with scales that naive intuition or pedestrian simplification does not allow. 8 Rigon et al., Montpellier, October 21, 2011Monday, October 24, 11 </li> <li> 14. GEOtop structure 1. Radiation - distributed model - sky view factor, self and cast shadowing, slope, aspect, drainage 2. Water balance 6. vegetation interaction - effective rainfall - surface flow (runoff and channel - multi-layer vegetation routing) scheme - evapotranspiration 3. Snow-glaciers - multilayer snow scheme 5. soil energy balance - soil 4. surface energy balance temperature...</li></ul>