Ziz

Ziz river ranks fourth in this list of the longest rivers in Algeria. It flows across Morocco and Algeria in the south. Its source is in Morocco's High Atlas Mountains, and it runs 282 kilometers into Algeria's Sahara Desert. The Ziz riverbed has long been used to facilitate human movement over the mountainous region, despite the fact that water flow is sporadic. The river might be found without water at times due to the dryness of the region. The river's water is used for both personal and agricultural purposes by the communities that live along its banks.

Errachidia, Erfoud, and Sijilmassa are cities along the Ziz river. Near Errachidia, there is a dam with hydropower producing capacity on the Ziz. There is usually a common water rights regulation along the Ziz, which states that each hamlet and villager has the right to fair use and extraction of Ziz waters. Water is typically redirected to flatter places to create a canal that irrigates palm trees and other crops while also providing residential water.

Length: 175 miles (shared with Morocco)