keyline design with clay in arid climate

Hello,
I live in the high plains of NE Colorado with clay soil and an average of 18" of rain a year. I have a gentle sloping hill that's ~20 acres in size; it drops about a 100' over 1000' distance. I rarely get much standing water. Is keyline plowing going to do anything? All the examples I've seen have much more precipitation or naturally flowing water.

My instincts tell me the keyline system won't see enough moisture to matter. Does anyone have experience with this kind of environment?