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Juliet Christian-Smith, a senior researcher at the Pacific Institute in Oakland, California, agreed that grou gucci shawl, ndwater storage technologies such as MAR could provide useful buffers against the increased variability in rainfall that climate models predict.

“There are a lot of positives associated w nike hyperdunk 2011 low, ith storing water underground,” Christian-Smith said. “We usually think of our water supply as coming from surface water such as snowmelt and rivers, but in fact . . . much of the water that nike air max 2 cb 94, supports irrigation and our global food supply comes from groundwater and in many cases it is being depleted faster than it is being recharged, leaving room for underground storage.”

Bec nike air max 24 7, ause it stores water underground, MAR isn’t vulnerable to some of the problems that plague dams, she added. For example, climate simulations predict that many parts of the Earth will experience warmer nike ken griffey shoes, temperatures, which will in turn increase evaporation rates at dams. “There’s also problems with sedimentation, because if you have more flooding, you could have more subsidence and erosion,&quo nike zoom rookie lwp, t; she said. “That means your dam life and the amount of water it can store is reduced.”

CGIAR’s McCartney said MAR use in Southeast Asia is still only at the idea stage. “It ha air jordan 11, sn’t gone beyond people thinking about it,” he said. “There would need to be quite a lot more research done.”

One question that will need to be resolved, Christian-Smith said, i jordan 5, s what impact recharge has on water quality. A recent study in Bangladesh, for example, indicates that repeated injection of water into underground aquifers could leach arsenic and other toxic chemica Yves Saint Laurent Boots, ls from the ground and concentrate it in the water supply.