Multi-stage flood routing for gated reservoirs and conjunctive optimization of hydroelectricity income with flood losses

Açanal, Neşe; Yurtal, Recep; Haktanır, Tefaruk

doi:10.1080/02626660009492370

Cited by 9 publications

(3 citation statements)

References 4 publications

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“…Therefore, the optimum rule among so many operation options presented by the 15-stage model for those dams whose purposes include hydropower can be chosen by minimizing the downstream flood damage costs after taking the benefits of the hydropower generation into account. For example, in a previous study, the maximization of the energy benefits was done by monthly operation of hydropower turbines by a dynamic programming model and the minimization of the downstream flood damage losses was done by hourly operation of spillway gates using a six-stage operation model (Acanal et al 2000).…”

Section: Resultsmentioning

confidence: 99%

“…Method C is a combination of methods A and B, and about various possibilities of routing operations, it is stated that: "By use of computerized systems analysis models, various alternatives in methods of flood control regulation can be conveniently tested and evaluated in order to achieve the optimum regulation" (HEC 1987). Afshar and Salehi (2011) recently proposed a modification of the six-stage model presented by Acanal et al (2000), which takes into account additional real-time information of the inflow hydrograph measured at a gauging station installed at the entrance to the reservoir. A demonstration of their model is given on the Karkheh Dam in Iran.…”

Section: Introductionmentioning

confidence: 99%

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Fifteen-stage operation of gated spillways for flood routing management through artificial reservoirs

Haktanır

Çıtakoğlu

Açanal

2013

Hydrological Sciences Journal

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A procedure to identify sets of operational rules for gated spillways for optimal flood routing management of artificial reservoirs is proposed. The flood retention storage of a dam having a gated flood spillway is divided into 15 sub-storages whose surface elevations are identified as critical levels. The most suitable operation set for the downstream conditions and for the dam can be chosen from many derived operation sets. The spillway gates are operated in an optimum way for any floods from very small magnitudes to the probable maximum flood (PMF), without having to forecast the actual magnitude of the incoming flood hydrograph. Decision floods are formed by dividing the PMF into 15 sub-hydrographs by 5 and 10% increments in the ranges 5-50% and 50-100% of the PMF, respectively. Many potential spillway gate openings from closed to fully open are chosen initially. As a result of a series of routing simulations of 15 decision floods, a set of 15 gate openings is determined such that all floods from very small magnitudes to the PMF may be routed without overtopping the dam crest. Next, a few more 15-stage operation rules are determined such that the gate openings of the initial stages are decreased as their critical levels are increased stepwise, with the objective of attenuating smaller floods more effectively and releasing higher outflows for larger floods close to and including the PMF. The developed model is applied to the Catalan and Aslantas dams in Turkey, both of which serve for flood mitigation as well as hydropower generation. Manoeuvre à quinze niveaux de déversoirs à vannes pour la gestion du transfert de crues au travers de réservoirs artificielsRésumé On propose une procédure pour identifier des ensembles de règles opérationnelles de déversoirs à vannes pour la gestion du transfert des crues dans des réservoirs artificiels. Le volume de rétention des crues d'un barrage ayant un évacuateur de crues à vannes est divisé en 15 sous-stockages dont les niveaux sont identifiés comme des niveaux critiques. L'ensemble de manoeuvres le plus approprié pour les conditions en aval et pour le barrage peut être choisi parmi de nombreux jeux de manoeuvres possibles. Les vannes de l'évacuateur sont manoeuvrées de manière optimale pour toute crue, allant d'une crue de très petite amplitude à la crue maximale probable (CMP), sans avoir à prévoir l'ampleur réelle de l'hydrogramme de crue entrant. Les crues de décision sont produites en divisant la CMP en 15 sous-hydrogrammes par incréments de 5 et 10% dans les gammes de 5-50% et 50-100% de la CMP, respectivement. De nombreuses ouvertures potentielles de vannes du déversoir, de la position fermée à complètement ouverte, sont choisies au départ. Résultat d'une série de simulations du transfert de 15 crues de décision, un ensemble de 15 ouvertures de vannes est déterminé, de telle sorte qu'elles puissent transférer toutes les crues, depuis les crues de très petite amplitude à la CMP, sans débordement au-dessus de la crête du barrage. Ensuite, quelques règles de manoeuvre...

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fifteen-stage operation of gated spillways for flood routing management through artificial reservoirs

Haktanır

Çıtakoğlu

Açanal

2013

Hydrological Sciences Journal

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“…Acanal et al (2000) proposed a six-stage operation policy for routing floods with return periods from 1.01 year up to the Probable Maximum Flood (PMF) for dams having a gated spillway. They showed regardless of the size and timing of any incoming flood, the proposed six-stage operation policy could be used for flood routing.…”

Section: Introductionmentioning

confidence: 99%

A real-time operation optimization model for flood management in river-reservoir systems

2009

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In this paper, a new methodology has been developed for real-time flood management in river-reservoir systems. This methodology is based upon combining a Genetic Algorithm (GA) reservoir operation optimization model for a cascade of two reservoirs, a hydraulic-based flood routing simulation model in downstream river system, a Geographical Information System (GIS) based database, and application of K-Nearest Neighbor (K-NN) algorithm for development of optimal operating rules. The GA optimization model estimates the optimal hourly reservoirs' releases to minimize the flood damages in the downstream river. GIS tools have also been used for specifying different land-uses and damage functions in the downstream floodplain and it has been linked to the unsteady module of HEC-RAS flood routing model using Hec-GeoRAS module. An innovative approach has also been developed using K-NN algorithm to formulate the optimal operating rules for a system of two cascade reservoirs based on optimal releases obtained from the optimization model. During a flood event, the K-NN algorithm searches through the historical flood hydrographs and optimal reservoir storages determined by the optimization model to find similar situations. The similarity between the hydrographs is quantified based on the slopes of rising and falling limbs of inflow hydrographs and reservoir storages at the beginning of each hourly time step during the flood events for two cascade reservoirs. The developed methodology have been applied to the Bakhtiari and Dez River-Reservoir systems in southwest of Iran. The results show that the proposed models can be effectively used for flood management and real-time operation of cascade river-reservoir systems.

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2002

Hydrological Processes

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Multi-stage flood routing for gated reservoirs and conjunctive optimization of hydroelectricity income with flood losses

Cited by 9 publications

References 4 publications

Fifteen-stage operation of gated spillways for flood routing management through artificial reservoirs

Fifteen-stage operation of gated spillways for flood routing management through artificial reservoirs

A real-time operation optimization model for flood management in river-reservoir systems

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