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Élaboration des consignes de gestion des barrages - réservoirs

Abstract : This Phd dissertation deals with models for building rational allocation of water in natural resources systems and numerical tools for reservoir operation. Applications have been developped for two distinct water resources systems. The Neste case study shows bicreteria (irrigation & water quality) weekly operation of a water resource system during dry period. Two ways of handling the problem are assessed and compared on a real case study: -a stochastic dynamic programming model with a two dimensionnal state (reservoirs level, river level) that is numerically solved by discretization; -a more "synthetic" model where the state is expressed in term of a tail aera probability related to the consumption of all the present water resources in the future. A practical decision rule is based upon the associated critical value. Numerical results are plotted on historical series for both methods. On the Seine case study, we provide the elements for a trade-off between the quality of the optimization model and the efficiency of the hydrological model in the field of water resources system management. In this paper, we develop two techniques. The first one is an extension of the Mass Curve technique to the stochastic case by means of simulation. This very simple management technique linked to a conceptual rainfall-runoff model, is confronted to a stochastic dynamic programming technique working with a blackbox rainfall-runoff model. The comparison is made from the viewpoint of efficiency. One is specifically interested in reducing streamflow variability downstream a reservoir. To make this comparison easily implemented on a computer, a new approach to stochastic dynamic programming based on the stochastic control of a diffusion process is derived. From these two examples, general conclusions on limits and advantages of modelization techniques and decision making tools are derived for water resources systems.
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https://pastel.archives-ouvertes.fr/pastel-00569481
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Submitted on : Friday, February 25, 2011 - 11:13:55 AM
Last modification on : Tuesday, September 8, 2020 - 2:52:06 PM
Long-term archiving on: : Thursday, May 26, 2011 - 2:51:01 AM

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  • HAL Id : pastel-00569481, version 1

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Eric Parent. Élaboration des consignes de gestion des barrages - réservoirs. Hydrologie. Ecole Nationale des Ponts et Chaussées, 1991. Français. ⟨pastel-00569481⟩

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