地下水（groundwater）.doc

地下水（groundwater） The first section is a brief history of the study Groundwater and its function The surface currents sometimes disappear suddenly and disappear, while the caves often have waterfalls, singing and flowing water. These natural phenomena have attracted peoples attention and conjecture for a long time. Aristotle, an ancient Greek scholar, had deduced that there was a large lake connected with the ocean in the cave, and that the lake overflowed as a spring water. Astronomer Kepler (chapter second) compares the earth to a monster: it drinks into the bitter sea, filters it through digestion, and finally filters out the clear oasis. Chinas Ming Dynasty traveler Xu Xiake (1586-1641) hard, several times of distress, visited Hunan, Guangxi, Guizhou and Yunnan and other places of Karst terrain on foot, to explore the more than 100 cave, a detailed record of the limestone area landform and water. In his diary: Xu Xiakes travels (leaving only about 1/4) but not outstanding geographical masterpiece, but also beautiful literary works. Although mankind began very early practice of water wells, groundwater and indissoluble bound, however, until the British Industrial Revolution, the vigorous development of the mining industry, and understanding of the development of groundwater that has made great progress. Various mining tunnels drive underground aquifers at different depths, and the widespread use of new energy and new power has further drilled wells into deeper strata. Facing the problems of population density and epidemic epidemics, people have developed from passive use of natural spring water to the extraction of clean and sterile underground water, which has promoted the understanding of the law of groundwater. French engineer Darcy (Herny Darcy 1803-1858) is built in the city of Dijon (Dijon) city design pressure water supply system, put forward the famous Darcys law in hydrogeology hydrogeology; another important law - Dupuit law, is a French engineer Dupuit