Amaravati River — longest tributary of the Kaveri in western Tamil Nadu Amaravati River The Amaravati River rises at the Manjampatti Valley border, flows c.282 km through Kerala–Tamil Nadu uplands and plains, supports irrigation, a dam with hydropower, local ecosystem…
Amu Darya (Oxus) — Major River of Central Asia Amu Darya The Amu Darya, historically called the Oxus, is a principal river of Central Asia formed by the confluence of the Vakhsh and Panj; it has shaped regional history, irrigation, and m…
Arasalar River — distributary of the Kaveri (Cauvery) Arasalar River Arasalar River is a distributary of the Kaveri (Cauvery) that flows through the Cauvery delta, irrigates agricultural land, and reaches the Bay of Bengal at Karaikal in the Karaika…
Archimedes' screw A helical pump attributed to Archimedes, used to lift water and, in reverse, to generate low-head hydropower; valued for simplicity, durability and tolerance of debris.
Aswan Dam Collective name for Egypt’s Aswan Low Dam and the later Aswan High Dam on the Nile; they control floods, store irrigation water and generate hydropower while causing major environm…
