Abstract:A useful tool is proposed in this paper to assist dam managers in comparing and selecting suitable operating rules. This procedure is based on well-known multiobjective and probabilistic methodologies, which were jointly applied here to assess and compare flood control strategies in hydropower reservoirs. The procedure consisted of evaluating the operating rules' performance using a simulation fed by a representative and sufficiently large flood event series. These flood events were obtained from a synthetic rainfall series stochastically generated by using the RainSimV3 model coupled with a deterministic hydrological model. The performance of the assessed strategies was characterized using probabilistic variables. Finally, evaluation and comparison were conducted by analyzing objective functions which synthesize different aspects of the rules' performance. These objectives were probabilistically defined in terms of risk and expected values. To assess the applicability and flexibility of the tool, it was implemented in a hydropower dam located in Galicia (Northern Spain). This procedure allowed alternative operating rule to be derived which provided a reasonable trade-off between dam safety, flood control, operability and energy production.

Montes et al. | Análisis regional de frecuencia de avenidas en la vertiente cantábrica y noratlántica […] RESUMENEn el presente trabajo se ha desarrollado un modelo estadístico para estimar la frecuencia de caudales punta en la vertiente cantábrica y noratlántica de España, basándose en la metodología de Análisis Regional con sus parámetros estimados por los L-momentos (Hosking y Wallis, 1997). Para ello se ha contado con 85 puntos de aforo en régimen natural, con registros de caudal máximo anual entre los 15 y 72 años. Los resultados del estudio revelan la existencia de 9 regiones estadísticamente homogéneas, es decir, regiones que comparten la misma función de distribución de frecuencias excepto por un factor de escala. Como principales conclusiones del estudio cabe subrayar la distinción de regiones según su carácter pluvial o nival, así como la capacidad del modelo propuesto para estimar valores extremos de caudales punta con mayor robustez que otras metodologías