Not really a convincing opposite side. For starters it's not winter, so the argument that the dumping of water is due to a winter time regulation is an outright lie. Secondly, if the intention is to simply make room in the reservoir then it should be done by encouraging more use. Reduce water costs for a few weeks and let people fill up thier own storage bins for the dry season.

Instead they are telling residents to REDUCE consumption.

Your "alternative explanation" is in direct conflict with the facts.