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Niagara, river, United States and Canada

(Encyclopedia)Niagara nīăgˈrə [key], river, 34 mi (55 km) long, issuing from Lake Erie between Buffalo, N.Y., and Fort Erie, Ont., Canada. It flows north around Grand Island and over Niagara Falls to Lake Ontar...

Paraná, river, Brazil, Paraguay, and Argentina

(Encyclopedia)Paraná, river, c.2,000 mi (3,200 km) long, formed by the junction of the Paranaíba and the Rio Grande, SE Brazil. It has the second largest drainage system in South America. It flows generally south...

Negro, Río, river, Uruguay and Brazil

(Encyclopedia)Negro, Río rēˈō nāˈgrō [key], principal river of Uruguay, c.500 mi (800 km) long, rising in S Brazil and flowing SW across central Uruguay to the Uruguay River. It traverses a sheep-raising reg...

floodplain

(Encyclopedia)floodplain, level land along the course of a river formed by the deposition of sediment during periodic floods. Floodplains contain such features as levees, backswamps, delta plains, and oxbow lakes. ...

Lop Nur

(Encyclopedia)Lop Nur lôp nûr [key], salt basin, SE Xinjiang Uygur Autonomous Region, China, in the Tarim River basin. Since 1964, Lop Nur has been used by the China for its nuclear test explosions. Once a large ...

Roman roads

(Encyclopedia)Roman roads, ancient system of highways linking Rome with its provinces. Their primary purpose was military, but they also were of great commercial importance and brought the distant provinces in touc...

Turin

(Encyclopedia)Turin to͝orˈĭn, tyo͝orˈ–, tyo͝orĭnˈ [key], Ital. Torino, city (1991 pop. 962,507), capital of Piedmont and of Turin prov., NW Italy, at the confluence of the Po and Dora Riparia rivers. It i...

Padua

(Encyclopedia)Padua pădˈyo͞oə [key], Ital. Padova, city (1991 pop. 215,137), capital of Padova prov., in Venetia, NE Italy, connected by canal with the Brenta, Adige, and Po rivers. It is an agricultural, comme...

Li Pai

(Encyclopedia)Li Pai: see Li Po.

Little Red River

(Encyclopedia)Little Red River, 105 mi (169 km) long, rising in the Boston Mts., NW Ark., and flowing SE to the White River. Greers Dam and reservoir (completed 1964) provide flood control and hydroelectric power. ...