U.S. - Italy Research Workshop on the
Hydrometeorology, Impacts and Management of Extreme Floods
Perugia (Italy), November 13-17, 1995
MANAGING RESERVOIRS FOR FLOOD CONTROL
Juan B. VALDES
Department of Civil Engineering and Climate System Research Program
Texas A&M
University College Station,
TX 77843-3136, USA
J.B. MARCO
Universidad Politècnica de Valencia
Departemento de Ingegneria Hidràulica y Medio Ambiente
46071 Valencia, Spain
The impact of streamflow forecasting on reservoir operations is a function
of several factors, including the size of the system, the time scale of
operation, the relative size of regulation capacity of the system, and
the use of the water stored in the system. Flow forecasting techniques
have been extensively developed in literature. However, the inclusion of
these forecasts in stochastic optimization models have not obtained wide
acceptance among engineers responsible for systems operations, in particular,
real time flood control in multiple reservoir systems. The premise of this
paper is that the reluctance of practitioners to embrace these methods
in flood control does not result from theoretical inadequacy of the stochastic
optimization models to represent complex multi-reservoir systems. Rather,
the problem may be stem from the lack of completeness of the optimization
models: inadequate representation of all relevant objectives and constraints
in the operation of a reservoir system, and inadequate mechanisms to incorporate
risk within the decision-making process. Extensive research has been carried
out to determine operating policies of a multi-reservoir system, but the
area remains open for further research. One reason research in this field
remains active is the number of simplifications which have to be made in
order to make a complex system more tractable. An issue that very few papers
have dealt with is the combination of both long and short term operation,
in which the long term policies are used as boundary conditions for the
short term optimization algorithm.