River valley in the context of "Wadi"

The Danubian Plain (Bulgarian: Дунавска равнина, romanized: Dunavska ravnina) constitutes the northern part of Bulgaria, situated north of the Balkan Mountains and south of the Danube. Its western border is the Timok River, and to the east it borders the Black Sea. The plain has an area of 31,523 square kilometres (12,171 sq mi). It is about 500 kilometres (310 mi) long and 20 to 120 kilometres (12 to 75 mi) wide.

The Danubian Plain is contiguous with the Wallachian Plain (forming the Lower Danubian Plain), but its elevation is slightly higher and the relief is more hilly and rolling, featuring numerous plateaux and river valleys. The climate is markedly temperate continental with a weak Black Sea influence in the east. Precipitation is on average 450–650 mm a year. Important rivers include the Danube, the Iskar, the Yantra, the Osam, the Vit, the Rusenski Lom, the Ogosta, and the Lom.

A ria (/ˈriːə/; Galician: ría, feminine noun derived from río, 'river') is a coastal inlet formed by the partial submergence of an unglaciated river valley. It is a drowned river valley that remains open to the sea.

The Blackmore Vale (/ˈblækmɔːr/; less commonly spelt Blackmoor) is a vale, or wide valley, in north Dorset, and to a lesser extent south Somerset and southwest Wiltshire in southern England.

The Rio Grande Valley is the river valley carved out by the Rio Grande as it flows through the American Southwest and northeastern Mexico, forming a part of the border region. In the US state of New Mexico, the river flows mostly north to south, and forms a valley from near Cochiti Pueblo to the state line near El Paso, Texas, along the floors of the large sedimentary basins of the Rio Grande Rift, and includes the narrow sections between the basins. It has been historically settled first by the Pueblo peoples, the Spanish, the Mexicans, and finally Anglo-Americans. As the largest river in the state, some of New Mexico's most populous cities are located wholly or partially in the valley, including Albuquerque, New Mexico's largest city.

The Rio Grande Valley is vital to the state's surface and groundwater municipal water supply, recreation, and agriculture, including irrigated farmland, the Rio Grande Valley AVA, the Mesilla Valley AVA, and the largest acreages of land for growing chile peppers and pecans in the United States, accounting for 77% and 14% of US production, respectively.

The term Great Genoa (Italian: Grande Genova) refers to the present area of the municipality of Genoa, in the north west of Italy. Great Genoa extends for over 30 km along the coast of Ligurian Sea from Nervi to Voltri, and up the Polcevera valley of the Polcevera river and the Bisagno river valley of the Bisagno river.

Great Genoa dates from 1926, when 19 municipalities were added to the six municipalities incorporated in 1874.

The Arsiani Range (Turkish: Yalnızçam Dağları) or (Georgian: არსიანის ქედი, arsianis kedi) is a mountain range in Eastern Anatolia Region, northeast Turkey, and the Autonomous Republic of Adjara, southwest Georgia. The range, continuing the Lesser Caucasus to the Armenian Highlands, forms the watershed between the river valleys of Çoruh/Chorokhi and Kura/Mtkvari. The highest peak is that of "Yalnızçam" or "Arsiani" (3,165 m).

The Kansas River, also known as the Kaw, is a meandering river in northeastern Kansas in the United States. It is potentially the southwestern most part of the Missouri River drainage, which is sometimes in turn the northwesternmost portion of the extensive Mississippi River drainage. Its two names both come from the Kanza (Kaw) people who once inhabited the area; Kansas was one of the anglicizations of the French transcription Cansez (IPA: [kɑ̃ze]) of the original kką:ze. The city of Kansas City, Missouri, was named for the river, as was later the state of Kansas.

The river valley averages 2.6 miles (4.2 km) in width, with the widest points being between Wamego and Rossville, where it is up to 4 miles (6.4 km) wide, then narrowing to 1 mile (1.6 km) or less in places below Eudora and De Soto. Much of the river's watershed is dammed for flood control, but the Kansas River is generally free-flowing and has only minor obstructions, including diversion weirs and one low-impact hydroelectric dam.