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pierredv : water   9

Scientists think they’ve solved one mystery of Easter Island’s statues | Ars Technica Mar 2019
"Lipo and Broadman meticulously mapped out where those fresh water sources were located all around the island, and wherever they found fresh water pockets along the coast, they also found ahu. (Fresh water also pools in craters on the island, forming lakes, but the archaeological evidence didn't support houses and villages in those areas.) They used a technique called quantitative spatial modeling to demonstrate that the pattern they observed was statistically sound, not just a matter of human perception."
ArsTechnica  archaeology  water  hydrology 
march 2019 by pierredv
Gel-like ice is the lightest form of water ever discovered | New Scientist, Sep 2017
via John Helm

"The frosty cubes we pull from our freezers are just one of 17 possible types of ice, and an 18th type isn’t far from being made real. A team of researchers has now discovered a type of porous, lightweight “aeroice” – the aerogel of ice, if you will – that can tell us more about how water works under extreme conditions."
NewScientist  water  physics  chemistry 
september 2017 by pierredv
Aquifers: Deep waters, slowly drying up | The Economist
"Depletion of aquifers is a looming tragedy. New agreements offer hope "
"CLEMENT weather and plentiful water mean that Punjab produces an eighth of India’s total food grains. But the water table has dropped by ten metres since 1973 and the rate of decline is accelerating on both the Indian and the Pakistani sides of the region"
Depletion of aqiufers is described as a tragedy of the commons
"Aquifers, like fish stocks, are most at risk when they cross national borders, making property rights weaker."
"Almost 96% of the planet’s freshwater resources are stored as groundwater, half of which straddles borders."
water  property-rights  commons  factoids  TheEconomist 
november 2010 by pierredv
No water? No problem for these Jordanian farmers. / The Christian ...
"By finding new markets for vegetables that require little water, a handful of Jordanian farmers are proving that agriculture can prosper in a dry land."
Arguments here probably relevant to many countries where there's potential conflict between high tech farmers generating foreign exchange and populist politicians looking out for the interests of the poor
farming  economics  jordan  water 
february 2010 by pierredv
California’s sinking delta |
"Draining allowed oxygen to penetrate the soil, permitting microbes to consume organic detritus that had lain undisturbed for millenniums, and to churn out carbon dioxide. As the soil deflated, the land sank as much as two inches per year."
Same happened in the Netherlands -
"Before settlement, the country comprised an expanse of dome-shaped peat bogs rising above sea level. Around 1200, farmers dug channels to drain the domes, and the land sank, setting off a centuries-long race between technology and water. As sinking land and higher water tables threatened crops, the Dutch found better ways to drain the land – sluices, followed by dikes and windmill-powered pumps – and this lowered the water table further, enabling oxygen and microbes to penetrate deeper, devour more peat, and deflate additional land."
**  california  coastalengineering  coasts  geography  netherlands  water 
december 2009 by pierredv

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