Wind energy does not need additional pumped storage schemes. It is enough just to lower the flow through the hydro plants in times when wind power has a good production. By this you keep more water behind the dams for times, when wind is not blowing. I found that recently, Tasmania decid...
It is largely unknown what has been lost from the construction of dams that flooded whole valleys and tamed wild rivers for hydro-electric power generation or irrigation schemes because these places were not surveyed in advance of them being flooded. Likewise, land clearance for agriculture, ...