In Australia We have a river system known as the Murray Darling system, which is one of the major river system. It used to flow to the ocean, but now the mouth is silted and blocked. Primarily through damming of the water by hundreds of farmers on the water table that feeds it. It is both prevented from flowing into the river, and the spread of the water over the wide surface areas the dams create means it evaporates very quickly in the heat. Most cities are built around a reliable water source, but the disruption of weather patterns for many reasons human intervention not the least, means there may not be less water as much it will be distributed in different places. Global warming is onl...

In Australia We have a river system known as the Murray Darling system, which is one of the major river system. It used to flow to the ocean, but now the mouth is silted and blocked. Primarily through damming of the water by hundreds of farmers on the water table that feeds it. It is both prevented from flowing into the river, and the spread of the water over the wide surface areas the dams create means it evaporates very quickly in the heat. Most cities are built around a reliable water source, but the disruption of weather patterns for many reasons human intervention not the least, means there may not be less water as much it will be distributed in different places. Global warming is only a part of the damage human 'civilization' has inflicted on the planet. Ironically it is only damage as far as we are concerned. Nature doesn't give two hoots. We are making the place harder for us to live in but there is a saying 'Nature abhors a vacuum' Where we leave a space, something will fill it. I hope it likes sulphides.