If you wondered why your city council is currently so interested in a “comprehensive stormwater management plan”, you need to read up on the Agenda. You haven’t been doing your homework. New forms of rain water removal have been decreed as “sustainable”, while the old forms are now called “unsustainable”.
It does not matter if your cattle make good use of rain water at the moment. The psychological turmoil that we will cause by just threatening them with impervious surface taxes (and the unjustifiable cost) will be priceless in bringing them into submission.