Here’s a little project I’ve been working on: All of the world’s reservoirs, as seen by the GRanD database. I think it still needs a few tweaks — let me know if anything looks off.
Reservoir capacity is proportional to the size of each dot. Note that capacity is measured as the extra capacity created by a manmade dam. For instance, Lake Victoria in Africa is here because there is a dam on it — but the “capacity” includes only the few feet at the top of the reservoir that can be controlled by the dam.