Vatndalsvatnet or Vatnedalsvatnet is a lake

Lake

A lake is a body of relatively still fresh or salt water of considerable size, localized in a basin, that is surrounded by land. Lakes are inland and not part of the ocean and therefore are distinct from lagoons, and are larger and deeper than ponds. Lakes can be contrasted with rivers or streams,...

 in the municipality of Bykle

Bykle

Bykle is a municipality in Aust-Agder county, Norway. It is located in the traditional region of Setesdal. The administrative center is the village of Bykle in the southern part of the municipality. Another village nearby is Nordbygdi...

 in Aust-Agder

Aust-Agder

is a county in Norway, bordering Telemark, Rogaland, and Vest-Agder. In 2002, there were 102,945 inhabitants, which is 2.2% of the total population in Norway. Its area is . The administrative center of the county is in Arendal....

 county, Norway

Norway

Norway , officially the Kingdom of Norway, is a Nordic unitary constitutional monarchy whose territory comprises the western portion of the Scandinavian Peninsula, Jan Mayen, and the Arctic archipelago of Svalbard and Bouvet Island. Norway has a total area of and a population of about 4.9 million...

. The nearby lakes Ormsavatnet

Ormsavatnet

Ormsavatnet is a lake in the municipality of Bykle in Aust-Agder county, Norway. It flows into the Vatndalsvatnet via a dam and canal. The lake is located in the Setesdalsheiene mountains near the lakes Store Urevatn, Holmevatnet, and Hartevatnet. The nearest village area is Hovden in Bykle....

 and Store Urevatn

Store Urevatn

Store Urevatn is a lake in the municipality of Bykle in Aust-Agder county, Norway. The water leaving this lake high up in the Setesdalsheiene mountains has a dam on it which leads to a canal that brings the out-flowing water to the nearby Vatndalsvatnet lake....

 flow into the lake through dam

Dam

A dam is a barrier that impounds water or underground streams. Dams generally serve the primary purpose of retaining water, while other structures such as floodgates or levees are used to manage or prevent water flow into specific land regions. Hydropower and pumped-storage hydroelectricity are...

s and canal

Canal

Canals are man-made channels for water. There are two types of canal:#Waterways: navigable transportation canals used for carrying ships and boats shipping goods and conveying people, further subdivided into two kinds:...

s. Vatndalsvatnet also has a dam on it and the water flows out of the lake from the dam into the Otra

Otra

The Otra river is the largest river in the Sørlandet region of Norway. It flows from the Setesdalsheiene mountains in Bykle municipality in Aust-Agder county in the north, down to the municipality of Kristiansand in the south, where it flows into the Skagerrak.The Otra is long, making it Norway’s...

river. The lake is located in the central part of Bykle, about halfway between the villages of Hovden and Bykle.