Now, I know nothing about Earth science, but is this not at least a little bit expected given that this is a man made lake? Can I see some pictures of natural l

Now, I know nothing about Earth science, but is this not at least a little bit expected given that this is a man made lake? Can I see some pictures of natural lakes in this area? Obviously the drought is bad, because this isn't common and looks very worrisome - but how much of this is just due to this lake basically being a giant swimming pool?