Dallol-Maouri Depression

Dallol Maouri is an extensive fossil river valley located in the Dosso region of southwestern Niger. It forms part of a larger ancient hydrographic network that once drained into the Niger River but has since become mostly dry due to long-term desertification. The geomorphology of the valley is characterized by a wide, flat floor bordered by steep lateritic plateaus, giving it a canyon-like appearance. Despite the absence of permanent surface water flow, Dallol Maouri contains rich groundwater reserves accessible at shallow depths. This makes the region one of Niger's most productive agricultural areas, where irrigation is used to grow onions, rice, and various grains. Culturally, the valley is named after the Maouri ethnic group, who have inhabited the area for centuries and developed complex traditional social structures. During the rainy season, temporary ponds can form, which are essential for local livestock and wildlife. The relatively lush vegetation on the valley floor provides a stark contrast to the surrounding arid plateaus.

Nature

Dallol Maouri

An important fossil river valley in the southwest, which is now a major wetland.

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Mékrou River

The Mékrou is a tributary of the Niger, flowing through the W National Park in northern Benin.

More places

Dosso children's museum

An interactive museum for children to discover the country's culture.

Dosso fruit plantation

Cultivation of mango and citrus fruits in small family farms.

Gaya sugarcane plantation

A large agricultural area for sugarcane cultivation in the south.

Gaya wetland

A rich habitat for water birds along the river.

Gaya irrigated land

Modern agricultural project with artificial irrigation.

Dallol-Bosso Valley

An ancient, dried-up river valley.

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Gourma Lowland

A flat area in the southwest.