Water turbine — A water turbine is a rotary engine that takes energy from moving water.Water turbines were developed in the nineteenth century and were widely used for industrial power prior to electrical grids. Now they are mostly used for electric power… … Wikipedia
Water wheel — This article is about the machine for converting energy of flowing or falling water. For paddle wheels used to propel watercraft, see paddle wheel ship. For wheels used solely to lift water, see Noria. For factories or industries driven by water… … Wikipedia
Water activity — or aw is a measurement of the energy status of the water in a system. It is defined as the vapor pressure of water above a sample divided by that of pure water at the same temperature; therefore, pure distilled water has a water activity of… … Wikipedia
Water supply and sanitation in Ecuador — has reached a significant increase in coverage in the last years. However, the sector is characterized by (i) low coverage levels, particularly in rural areas; (ii) low service quality and efficiency; and (iii) limited cost recovery and a high… … Wikipedia
Migration — • The movement of populations from place to place Catholic Encyclopedia. Kevin Knight. 2006. Migration Migration † … Catholic encyclopedia
water supply — Water is critical for domestic consumption and for sustaining economic activity in Spain, particularly agriculture, which accounts for 80 percent of water demand. Increasing demand, coupled with periods of drought, has led to the realization… … Encyclopedia of contemporary Spanish culture
migration — migrational, adj. /muy gray sheuhn/, n. 1. the process or act of migrating. 2. a migratory movement: preparations for the migration. 3. a number or body of persons or animals migrating together. 4. Chem. a movement or change of position of atoms… … Universalium
Migration in the People's Republic of China — Migrants leaving Badong in mostly rural western Hubei for the provincial capital Wuhan with an overnight bus have to brave the rigors of Highway G209 This article is about internal migration within the People s Republic of China. On top of the… … Wikipedia
Water in California — Map of water storage and delivery facilities as well as major rivers and cities in the state of California California’s interconnected water system serves over 30 million people and irrigates over 5,680,000 acres (2,300,000 ha) of farmland. As… … Wikipedia
Migration in China — This article is about internal migration within the People s Republic of China. On top of the existing 103 million urban migrants, Chinese cities will face an influx of another 243 million migrants by 2025, taking the urban population up to… … Wikipedia
Migration period of ancient Burma — History of Burma Prehistory 11,000–200 BCE Pyu city states 200 BCE–835 CE Mon kingdoms 825?–1057 Arakanese kingdoms 788?–1406 … Wikipedia