Yobe River

Map of the watershed of Yobe

Template: Infobox River / Obsolete

The Komadugu - Yobe, another notation is Komadougou - Yobe and is mainly used in Niger, is a river of the north- eastern Nigeria has its headwaters. In Nigeria, it is also referred to simply as Yobe River.

Geography

It is formed by the confluence of the Hadejia and Jama'are southwest of Gashua, then flows along the border with Niger, in parts it is also completely in Niger and resulted initially in Lake Chad, the open water area he not seen since the late 1980s. The size of its catchment area is including its headwaters approximately 148,000 km ² and is referred to as Komadougou - Yobe Basin, a sub- basin of the Chad Basin. From this Einzugebiet are 85,000 km ² in Nigeria seats and 63,000 sq km in Niger. His right tributary, the Komadugu Gana reached the Komadugu - Yobe only temporarily and empties into the area of ​​the resort Damasak, about 120 km before reaching the northern Tschadseebasin, in the Komadugu - Yobe.

At the confluence of the Hadejia and Jama'are forms seasonally from a 6,000 km ² large inland delta, which is called the Hadejia - Nguru wetlands and has an international importance. A branch of the Hadejia, the Marma Channel, leading to the endorheic Nguru Lake. This is part of a wetland of international importance and is surrounded by a Special Protection Area under the Ramsar Convention and is part of the bath - Nguru - sector of the Nigerian National Parks Chad Basin. Three other protected areas of the Ramsar Convention are the Maladumba Lake, Lake Chad Wetlands in Nigeria and the Baturiya Wetlands.

The rainfall in the catchment area of ​​the Komadugu - Yobe are highly differentiated in the field of source rivers fall about 1000-1600 l / m² rainfall. In the region of the confluence of Hadeija and Jama'are go an average of 500 l / m² rainfall and in the area of Lake Chad only up to 300 l / m². In the northern part of the basin, Niger, falling only 200 l / m of precipitation per year.

In the catchment area of the Komadugu - Yobe are several dams. Among the Challawa Gorge, the Tiga and Bagauda.

Hydrometrie

The flow rate of the Komadugu Yobe was over 24 years ( 1967-91 ) about 100 kilometers upstream measured in Bagara Diffa from the mouth ( in m³ / s).

Swell

  • Regional definition for Lake Chad (PDF file; . 8.41 MB, English ), pp. 22 - part of GIWA Report of the UNEP
  • The Komadougou - Yobe on Lake Chad Basin Project
  • Pre -water audit for the Komadugu Yobe Basin (PDF file, 1.27 MB)
Hadejia-Nguru wetlands Chad Basin National Park United Nations Environment Programme
483219
de