It isn’t just New Orleans that is menaced by sea water intrusion because of human-caused climate change.
is in the same dilemma. The mighty Tigris and Euphrates rivers flow together in southern Iraq into a body of water called the Shatt al-Arab, which then flows out into the Gulf. The Iran-Iraq War in 1980-1988 was fought in part over ownership of the Shatt al-Arab. Because of drought, heat, and damming works to the north in Iran and Turkey, the flow rate of the Shatt al-Arab has been much decreased. The saltwater of the Gulf is therefore intruding north.
When we talk about sea water rise as a result of climate change, we often concentrate on the threat of flooding of coastal areas. It isn’t only that the seas are rising. River deltas suffer from subsidence and so sink over time. And the rate of the water flow in great rivers is being reduced on several continents by extra heat and desiccation. So here is another outcome, the salinization of major sources of fresh water that had made some great coastal cities possible.
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