Authors: F. Welt, R. Kahawita
Abstract
A fully 2-dimensional hydrodynamic model based on a finite volume formulation using a Riemann solver resolution scheme is used for real time applications of hydroelectric plant operation. The impact of hourly changes in power generation on water quality for a set of hydroplants arranged in cascade along a complete river system is studied. The diffusion of heat from hot water sources such as fossil plants and industries, as well as heat exchanges due to radiation, convection and evaporation with the environment, are modeled. Of primary interest is the effect of peaking on water temperatures and dissolved oxygen levels. Provisions for representing the various power plants and spillways as internal boundary conditions are made, while initial conditions of flow, water levels and temperatures are provided by real-time measurements. Results show that minimum flow requirements should be imposed at all times, and that their values must be continuously adjusted for proper control of the river conditions. The approach is implemented within the context of real-time river management for power plant operation in North America and internationally.
