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root((AQU))
aquaculture
The farming of plants and animals （such as kelp, fish, and shellfish） that live in the water.
🌱The farming of oysters by the Romans was an early form of aquaculture that has continued to the present day. 🌳For most of the modern history of aquaculture, only costly fish and shellfish like salmon and shrimp were harvested. But new technologies are allowing cheaper and more efficient cultivation of fish for food, and such common fish as cod are now being farmed. Seaweeds and other algae are also being grown—for food （mostly in Asia）, cattle feed, fertilizer, and experimentally as a source of energy. Aquaculture is now the world's fastest-growing form of food production. aquanaut A scuba diver who lives and works both inside and outside an underwater shelter for an extended time.
🌱Each scientist at the laboratory spent two weeks a year as an aquanaut living in the deep-sea station. 🌳Aquanaut combines aqua with the Greek nautes, meaning "sailor." Like astronaut and aeronaut, the word may remind you of those mythical Greek heroes known as the Argonauts, who sailed with Jason on his ship, the Argo, in quest of the Golden Fleece. Various underwater habitats for aquanauts, such as Conshelf, SEALAB, and MarineLab, have captured the public imagination since the 1960s. aqueduct 1、 A pipe or channel for water.
2、 A bridgelike structure for carrying water over a valley.
🌱Roman aqueducts were built throughout the empire, and their spectacular arches can still be seen in Greece, France, Spain, and North Africa. 🌳Based party on the Latin ducere, meaning "lead" or "conduct" （See DUC/DUCT,） the word aqueduct named an ancient civil-engineering marvel. You may have seen photos of the great arches of ancient aqueducts spanning valleys in countries throughout the old Roman Empire, practical pipelines that are also regarded as works of timeless beauty. From the 20th century, the 242-mile Colorado River Aqueduct, the 336-mile Central Arizona Project, and the 444-mile California Aqueduct are considered wonders of American engineering, but they are not renowned for their beauty. Most aqueducts today either are riverlike channels or run underground, perhaps appearing simply as a long mound. aquifer A layer of rock, sand, or gravel that can absorb and hold water.
🌱Cities without access to a nearby lake or river must rely on underground aquifers to meet their water needs. 🌳The vast but relatively shallow Ogallala Aquifer lies beneath the Great Plains, under portions of eight states. Its thickness ranges from a few feet to more than a thousand feet. The Ogallala yields about 30 percent of the nation's groundwater used for irrigation in agriculture, and provides drinking water for most of the people within the area. But for many years more water has been extracted from the Ogallala than has been returned, and the situation today is of great concern.
🌱The farming of oysters by the Romans was an early form of aquaculture that has continued to the present day. 🌳For most of the modern history of aquaculture, only costly fish and shellfish like salmon and shrimp were harvested. But new technologies are allowing cheaper and more efficient cultivation of fish for food, and such common fish as cod are now being farmed. Seaweeds and other algae are also being grown—for food （mostly in Asia）, cattle feed, fertilizer, and experimentally as a source of energy. Aquaculture is now the world's fastest-growing form of food production. aquanaut A scuba diver who lives and works both inside and outside an underwater shelter for an extended time.
🌱Each scientist at the laboratory spent two weeks a year as an aquanaut living in the deep-sea station. 🌳Aquanaut combines aqua with the Greek nautes, meaning "sailor." Like astronaut and aeronaut, the word may remind you of those mythical Greek heroes known as the Argonauts, who sailed with Jason on his ship, the Argo, in quest of the Golden Fleece. Various underwater habitats for aquanauts, such as Conshelf, SEALAB, and MarineLab, have captured the public imagination since the 1960s. aqueduct 1、 A pipe or channel for water.
2、 A bridgelike structure for carrying water over a valley.
🌱Roman aqueducts were built throughout the empire, and their spectacular arches can still be seen in Greece, France, Spain, and North Africa. 🌳Based party on the Latin ducere, meaning "lead" or "conduct" （See DUC/DUCT,） the word aqueduct named an ancient civil-engineering marvel. You may have seen photos of the great arches of ancient aqueducts spanning valleys in countries throughout the old Roman Empire, practical pipelines that are also regarded as works of timeless beauty. From the 20th century, the 242-mile Colorado River Aqueduct, the 336-mile Central Arizona Project, and the 444-mile California Aqueduct are considered wonders of American engineering, but they are not renowned for their beauty. Most aqueducts today either are riverlike channels or run underground, perhaps appearing simply as a long mound. aquifer A layer of rock, sand, or gravel that can absorb and hold water.
🌱Cities without access to a nearby lake or river must rely on underground aquifers to meet their water needs. 🌳The vast but relatively shallow Ogallala Aquifer lies beneath the Great Plains, under portions of eight states. Its thickness ranges from a few feet to more than a thousand feet. The Ogallala yields about 30 percent of the nation's groundwater used for irrigation in agriculture, and provides drinking water for most of the people within the area. But for many years more water has been extracted from the Ogallala than has been returned, and the situation today is of great concern.
AQU comes from aqua, the Latin word for "water." We keep pet fish in an aquarium at home or visit larger sea animals in a building with that name. Water sports such as swimming, canoeing, and sailing are sometimes called aquatics. In Scandinavia there's a popular drink called aquavit, the name coming from the Latin aqua vitae, "water of life"—though instead of water it mostly consists of alcohol.🌸