How did Crocodile sabotage the irrigation-canals?

[Fantastische Hure]

I guess hitting-up the places with Sand-Storms could be one way, like he did with Yuba but what other-way? Sending his mengs to destroy them would be too suspicious (but in Kouza's flashback it was said "who would do such a thing?") and work against framing Cobra but then if it were his mengs trained as Royal-Guards (basically unlikely before the Mr. 2 as Cobra incident) then there'd be all the reason for the all citizens to lose complete faith in him and regard him as evil and declare war on him but there were still people believing in him.

What gives?

 

[Fantastische Hure]

Or sucking-up the moisture of the land could be another way but how far does that ability extend to?

 

[SSJ2]

Or sucking-up the moisture of the land could be another way but how far does that ability extend to?

This.

 

[Warmmedown]

Went potty