How should hydraulic structures be erected?

In general, any engineering solution must be carefully thought out to the smallest detail. A hydraulic structure is also the result of engineering. The creation of a hydraulic structure is associated with numerous studies, forecasts, plans, tests. So, during the construction of a new hydroelectric power station, it is investigated how this object can affect the ecology, how the climate in the area will change, how the river bed and water inhabitants can react, where to settle people living in areas subject to flooding.