Mauritania’s landscape is mostly desert, but its rivers and seasonal streams shape where people live, farm and trade. These waterways help sustain local communities, support agriculture and mark important cross-border routes in West Africa.
There are 6 Rivers in Mauritania, ranging from Gorgol Blanc to Senegal River. For each river, you’ll find below Type, Length (km), Basin/Outlet and key locations.
Which of these rivers flow year‑round and which are seasonal?
Most waterways in Mauritania are seasonal, swelling during the West African rainy season and shrinking the rest of the year. The Senegal River is the principal year‑round river supporting navigation and irrigation, while smaller rivers such as Gorgol Blanc are largely intermittent and mainly valuable for local farming when they flow.
When is the best time to visit the rivers and how accessible are they?
Visit shortly after or during the rainy season for higher water levels and greener landscapes, though roads may be harder then; the dry season offers easier travel to river towns and banks. Major rivers have road access and local crossings, but check local advice, arrange guides where needed, and be mindful of seasonal conditions.
Rivers in Mauritania
| Name | Type | Length (km) | Basin/Outlet and key locations |
|---|---|---|---|
| Senegal River | perennial | 1,790 | Atlantic Ocean; flows along Mauritania’s southern border near Rosso and Kaédi |
| Gorgol Blanc | seasonal/wadi | 330 | Seasonal Senegal tributary; flows through southeastern Mauritania near Kaédi |
| Gorgol Noir | seasonal/wadi | 430 | Seasonal Senegal tributary draining central-southern Mauritania toward confluence |
| Karakoro | seasonal/wadi | 320 | Tributary of the Senegal River; partly forms Mali–Mauritania border near Kayes |
| Oued Seguellil | seasonal/wadi | 250 | Adrar-region wadi draining southeast toward the Aoukar basin; episodic flows |
| Oued El Abiod | seasonal/wadi | 300 | Adrar/Tagant seasonal wadi draining toward Aoukar depression; often dry |
Images and Descriptions
Senegal River
The Senegal River is the largest river linked to Mauritania. It flows from the Guinea highlands through Mali and forms parts of the border with Mauritania and Senegal. It runs to the Atlantic Ocean and supports irrigation, fishing, and towns such as Rosso and Kaédi. It is a major transboundary river and a primary freshwater source for southern Mauritania.
Gorgol Blanc
Gorgol Blanc (White Gorgol) is a main tributary in southern Mauritania. It flows seasonally and joins other Gorgol streams before reaching the Senegal River near Kaédi. It supplies water for local farms and irrigation and is included because it is a key local river system in Mauritania.
Gorgol Noir
Gorgol Noir (Black Gorgol) is a seasonal tributary in southern Mauritania. It meets the Gorgol Blanc and helps feed the Senegal River basin. It serves local agriculture and pastoral uses and is important for understanding the rivers that drain Mauritania into the Senegal basin.
Karakoro
The Karakoro is a transboundary tributary that rises near the Mali–Mauritania area and flows toward the Senegal River system. It has mostly seasonal flows and carries floodwater during the rainy season. It matters as a cross-border stream that contributes to Mauritania’s southern river network.
Oued Seguellil
Oued Seguellil is a seasonal wadi in central Mauritania. It flows only after rains and drains into inland basins or ephemeral floodplains. It is important for groundwater recharge and for nomadic and rural water use during the wet season.
Oued El Abiod
Oued El Abiod (White Wadi) is an intermittent dry river in Mauritania. It carries water briefly after storms and often ends in local depressions or salt pans. It is a typical Sahara-margin wadi and shows how most Mauritanian rivers are seasonal rather than year-round.
