Jay Angler wrote:
Water: Simple approach - Many coastal areas get either reliable rain or fog which can be harvested to replace underground water sources. Simple sand and charcoal filters can be used for safety of the water. Australia done great work in some areas on catching, conserving and reusing the water they've got.
High tech approach - there are solar run desalinators that could be made cost effectively without that much more research.
I totally believe that water retentive landscapes *coupled* with less pumping of water out of aquifers will allow aquifers to recharge, although I have read different opinions about the time scale required which may be based on the particular aquifer in question. It's always amazed me that my friend had a shallow fresh water well less than 5 ft above sea level out on a peninsula in Nova Scotia - water is amazing stuff!
In the longer term (approximately a decade after installation), might water retentive landscapes recharge the aquifers and push the sea water back out?