Operating a multipurpose reservoir through a climate forecast service

14:00 Wednesday 29 May

OC141

Room S7

 

Javier Herrero (Spain) 1; Eva Contreras (Spain) 1; Cristina Aguilar (Spain) 2; María José Polo (Spain) 1

1 - Fluvial Dynamics and Hydrology Research Group-Andalusian Institute for Earth System Research (IISTA), University of Córdoba, Campus Rabanales, Edificio Leonardo da Vinci, Área Ingeniería Hidráulica, 14071 Córdoba, Spain; 2 - Fluvial Dynamics and Hydrology Research Group-Andalusian Institute for Earth System Research (IISTA), University of Córdoba, Campus Rabanales, Edificio Leonardo da Vinci, Área Mecánica, 14071 Córdoba, Spain

In areas subjected to complex meteorology with long drought periods followed by intense flood episodes, like those affected by the Mediterranean climate and snow areas, water management involves a delicate balance between minimizing damage caused by floods and maximizing water use (to supply environmental, agricultural, industrial and urban demands), avoiding unnecessary losses. In this regards, reservoir management can be supported by forecasting climate data to foresee the water availability for the supply of the water demands in the most efficient way and make a profit from it. In this framework, the climate service ROAT (Reservoir Operation Assessment Tool) was developed in a co-generation process in which data purveyors, services providers and end-users are involved.

The pilot application of ROAT service consists in the assessment of the effect of different management operations over the multi-objective reservoir system of Béznar-Rules in the Guadalfeo Basin of Sierra Nevada (southern Spain). Climate forecast data provided by data purveyors are combined with real time meteorological data and a detailed reservoir water balance model as well as specific operation rules and water uses demand set by the end user, in this case reservoir managers. The service has a core system that is responsible for bringing the automatically updated information all together, executing the necessary operations with the appropriate models, and providing the results to a Web-based user interface.

The result is a technological tool targeted at end-users which provides results of seasonal forecast of precipitation and water inflow to the reservoir, the current state of the reservoir and the watershed. Besides it offers some management decisions and deploys the distribution of water resources between the different demands and the degree of accomplishment of the scheduled demands. This will allow to anticipate the real risk of drought / scarcity scenarios (based on forecast), but also the water excess discharges coming from snowmelt to avoid unnecessary damage downstream of the dam. Moreover, ROAT offers the users some decision options on the monthly distribution of their demands taking into account the future availability of water.

In conclusion, the co-generation process allows managers to make operation decisions knowing that they will have at their disposal the most up-to-date hydrological knowledge combining measurements and modeling, together with the most forward-looking seasonal forecast that already exist at European level, but also all this adapted to their real operating needs. Moreover, ROAT service has been designed to be easily applied in other systems.