The Three Gorges Dam is the world's largest hydroelectric power station. The difference in water level on two sides of the dam is about 180 m. In the year 2008, 26 turbine generator units had been installed to provide a total of 18200 MW of electricity generating capacity. Estimate the flow rate of water through each turbine near the lower reservoir when the power station operates at its full capacity. Assume the overall efficiency of the generators is 85%.