Divert this.
LOL!!! :)
As your photo bears a resemblance to the mighty Colorado River, which was diverted for the construction of both the Hoover dam and the recent bypass bridge, it appears it could be done. I’ll qualify that by stating I’m no expert on this. If feasible, it’s just a matter of how important one considers a fence to be in combating illegal immigration.
Divert that? I see a fence our our side far more protective than the one proposed. Put a guard houses along it at regular intervals ans each end where the fence attaches to it.