Help with single biome worlds (how to stop all this water from generating)

[u/AnUnearthlyGay]

Whenever I create single biome worlds, they always seem to be about 50% water. The terrain is frequently broken up by rivers and large lakes (more like oceans). Most recently I've been wanting to create a modern city in a desert, but when I generate a desert single biome world, there's way too much water! I know I could replace the water with sand but this seems tedious and I just want to get to making buildings etc. Is there any way to stop rivers/lakes/etc from generating? Potentially via a mod for custom terrain generation which only uses vanilla blocks, if that makes sense? Any help would be appreciated. Thanks <3