| Lumi | |
| Map Size: | 300 |
| Source1 Location: | Rombo District, Kilimanjaro |
| Mouth Location: | Lake Jipe |
| Subdivision Type1: | Country |
| Subdivision Name1: | Tanzania |
| Subdivision Type2: | Country |
| Subdivision Name2: | Kenya |
| Mouth Elevation: | 707m (2,320feet) |
| Basin Size: | 451km2 |
| River System: | Pangani River |
The River Lumi (also Lomi or Luffu) is located in Rombo District, Kilimanjaro in northereast Tanzania and a smallpart in southern Kenya in Coast Province. It originates on the east side of Mawenzi peakon the east side of (Mount Kilimanjaro), and flows so close to the River Rombo as almost to form a fork. The Lumi, however, maintains its southerly direction, and may thus be said to represent the upper course of the Ruvu, one of tho two main sources of the Pangani River. It flows around the Lake Chala and the Taveta town in the west and empties into the Lake Jipe.[1] The fish species Barbus sp. 'Pangani' has only been found in the river's N'joro Springs, situated in the upper Pangani River drainage basin.
Most water taken from the Lumi is from the section that flows through Kenya.[2] After the building of several dams along the Kenyan side of the Lumi, and with several periods of reduced rainfall, the dry up of Lake Jipe became a concern, necessitating wetland management programs.[3] During the period of 2004-2006, the United Nations Development Programme GEF Small Grants Programme and the Biodiversity Conservation Programme of the European Union have completed a de-siltation and restoration project of the river's original course.[4]