i think one of the answers could be condensation, evaporation, vaporization. I'm pretty sure it's all three of them. To add on, it could be Transpiration, Runoffs, and percolation. But I'm not sure where they go.
*Hope this helps!
Answer: even though they were American-born, the Dust Bowl migrants still were viewed as intruders by many in California, who saw them as competing with longtime residents for work, which was hard to come by at the time.
:)