Generally, yes, very much so.<p>Technically, no. Artificial hydro (more commonly known as pumped storage) means you can essentially store energy in gravity, anywhere. i.e. build a container at an elevated position, pump water into it using intermittent energy (e.g. wind at night, excess solar etc), drop water down through a turbine to generate electricity again to provide a low baseload.<p>The reality is that 1) this is hugely expensive and so generally pumped storage is restricted to exploit existing natural resources with lots of elevated mountains between which one can store ridiculous volumes of water rather than build your own giant water container.<p>So generally hydro is limited to existing water resources (e.g. large rivers), or storage resources (e.g. mountains) which are quite limited.