They are built on flat land because the dams in the power station cannot be tilted.This is because the dam would be tilted and wouldn't be secure to build.
I don't know about hilly areas (many stations are next to dams), but they have to be built where the water flows through the turbines by gravity (i.e., does not have to be pumped).
because the conditions for a hydroelectric power stations in the uk aren't right so only a few can be built.
for the passage of flood discharge
There are around 2,000 hydroelectric power stations in Britain. These power stations generate renewable energy by using the flow of water in rivers and streams to turn turbines and produce electricity.
A power station that harnesses power from running water.
You need a difference in height to drive the water turbines, so usually a dam is built with the power house at a lower level than the artificial lake formed by the dam. A flat area would not be any use, but you don't need a mountainous one either, just a few hundred feet in elevation.
Hydroelectric power stations certainly have their advantages and disadvantages, as do all forms of electrical generation. Probably the best solution is to use a combination of different means of producing electricity, with hydroelectric stations as part of the mix.
Moving water can be used to generate electricity in hydroelectric power stations.
There is electricity in much of the urban areas of Zambia. Hydro power is provided from the power stations at Kariba North, Victoria Falls and Kafue. Many rural parts of the country run on diesel power stations and many are now coming onto solar power.
hydroelectric power.
Hydroelectric power is created by water falling against a turbine by the force of gravity. If the water doesn't have a high place to fall from, there won't be any power.
Tidal power stations require specialized technology to capture energy from changing tides, which is still in the early stages of development and more expensive to build and maintain compared to traditional hydroelectric power stations. Additionally, tidal power stations face more technical challenges due to the harsh marine environment, increasing their construction and operation costs.