Ewaso Ng'iro, also called Ewaso Nyiro, is a river in Kenya which rises on the west side of Mount Kenya and flows north, then east and finally south-east, passing through Somalia where it joins the Jubba River. The river's name is derived from the local community's Maasai language, and means river of brown or muddy water. Downstream, the intermittent stream i…Ewaso Ng'iro, also called Ewaso Nyiro, is a river in Kenya which rises on the west side of Mount Kenya and flows north, then east and finally south-east, passing through Somalia where it joins the Jubba River. The river's name is derived from the local community's Maasai language, and means river of brown or muddy water. Downstream, the intermittent stream in Somalia is also called Lagh Dera.