Water tankA water tank is a container for storing water. They are used to provide storage of water for use in many applications, drinking water, irrigation agriculture, fire suppression, agricultural farming, both for plants and livestock, chemical manufacturing, food preparation as well as many other uses. Water tank parameters include the general design of the tank, and choice of construction materials, linings. Various materials are used for making a water tank: plastics (polyethylene, polypropylene), fiberglass, concrete, stone, steel (welded or bolted, carbon, or stainless).
Vallée ImperialLa vallée Imperial, en anglais , est une vaste plaine agricole californienne (openfields) alimentée par de nombreux canaux d'irrigation, eux-mêmes alimentés par le fleuve Salton. vignette|redresse|La vallée Imperial et la mer de Salton, vues de l'espace. Il s'agit d'une région aride, qui fait partie du désert du Colorado. La vallée Imperial reçoit de pluie par an et la température moyenne annuelle est de . Elle est en partie occupée par la mer de Salton, le plus grand lac de Californie. Elle se trouve dans le comté d'Imperial.
Groundwater-related subsidenceGroundwater-related subsidence is the subsidence (or the sinking) of land resulting from unsustainable groundwater extraction. It is a growing problem in the developing world as cities increase in population and water use, without adequate pumping regulation and enforcement. One estimate has 80% of serious U.S. land subsidence problems associated with the excessive extraction of groundwater, making it a growing problem throughout the world.