Chelif River {also Cheliff} is a 700 km long river in Algeria

Algeria

Algeria , officially the People's Democratic Republic of Algeria , also formally referred to as the Democratic and Popular Republic of Algeria, is a country in the Maghreb region of Northwest Africa with Algiers as its capital.In terms of land area, it is the largest country in Africa and the Arab...

 and also the longest one in the country. It rises from Saharan Atlas

Saharan Atlas

The Saharan Atlas of Algeria is the eastern portion of the Atlas Mountains. Not as tall as the Grand Atlas of Morocco they are far more imposing than the Tell Atlas range that runs closer to the coast. The tallest peak in the range is the high Djebel Aissa....

, flows through Tell Atlas

Tell Atlas

The Tell Atlas is a mountain chain over 1,500 kilometers in length, belonging to the Atlas mountain ranges in North Africa, stretching from Morocco, through Algeria to Tunisia. It parallels the Mediterranean coast...

 and empties into Mediterranean Sea

Mediterranean Sea

The Mediterranean Sea is a sea connected to the Atlantic Ocean surrounded by the Mediterranean region and almost completely enclosed by land: on the north by Anatolia and Europe, on the south by North Africa, and on the east by the Levant...

 north of the city of Mustaghanam at about 36.0377778°N 0.1313889°E. Water level in the river often fluctuates. The river is being used to irrigation

Irrigation

Irrigation may be defined as the science of artificial application of water to the land or soil. It is used to assist in the growing of agricultural crops, maintenance of landscapes, and revegetation of disturbed soils in dry areas and during periods of inadequate rainfall...

(mainly on its lower course).