Not really repopulation but couldn't think of better word. Thinking more along line of post-drought redistribution (migration?) throughout the lake.
How long does it take fish to "repopulate" a badly drought depleted lake? Say a lake down to 30% capacity, then rains like we've been having bring it back up to 100% (or more) within a week or two. Do the fish spread out as the lake refills or, for a while, hold to where they are as when the lake was at 30%?
If you know how many firearms you have without stopping to count...
...You don't have enough guns.
If the dollar value of your firearms exceeds the value of your ammunition...
...You don't have enough ammunition.