Depleting aquifers

Information Search with Depleting and Non-Depleting Resources

Predictions about information search behavior have been informed by extensive research in food foraging behavior. However, information foraging environments may differ in key ways from food foraging environments, and these differences may impact search behavior. We investigated the effect of patch distribution (depleting or non-depleting) and ability to return to previously searched patches on ...

Ozone-Depleting Substances: Alternatives

Surrounding the earth at a height of about 25 kilometers is the stratosphere, rich in ozone, which prevents the sun’s harmful ultraviolet (UV-B) rays from reaching the earth. UV-B rays have an adverse effect on all living organisms, including marine life, crops, animals and birds, and humans. In humans, UV-B is known to affect the immune system; to cause skin cancer, eye damage, and cataracts; ...

Storage in Saline Aquifers

Periodic forcing in composite aquifers

Observations of periodic components of measured heads have long been used to estimate aquifer di€usivities. The estimations are often made using well-known solutions of linear di€erential equations for the propagation of sinusoidal boundary ̄uctuations through homogeneous one-dimensional aquifers. Recent ®eld data has indicated several instances where the homogeneous aquifer solutions give incon...

Arsenic, microbes and contaminated aquifers.

The health of tens of millions of people world-wide is at risk from drinking arsenic-contaminated well water. In most cases this arsenic occurs naturally within the sub-surface aquifers, rather than being derived from identifiable point sources of pollution. The mobilization of arsenic into the aqueous phase is the first crucial step in a process that eventually leads to human arsenicosis. Incr...