Estimating canal pool resonance with auto tune variation
Résumé
The Integrator-Delay (ID) model is commonly used to model canal pools which do not exhibit resonance behavior. Simple step tests are often used to estimate ID model parameters; namely, delay time and backwater surface area. These step tests change the canal inflow at the upstream end of the pool and observe water depth variations at the downstream end. Some knowledge of the canal pool characteristics are needed to determine the amount of flow change and its duration. The Auto Tune Variation (ATV) method is one method for determining the duration of these step tests. Pools that are under backwater over their entire length tend to exhibit oscillations due to resonance waves. Binary-Random-Sequence (BRS) tests have been used to determine the resonance frequency of such pools, where step tests with different durations are used. PBRS tests are difficult to implement in practice and may not provide the resonance frequency. The intent of this paper is to demonstrate on a real canal that the ATV method can determine both the resonance frequency and the resonance peak height for canal pools whose water levels oscillate.
Domaines
Sciences de l'environnement
Origine : Fichiers produits par l'(les) auteur(s)