 The Ndamba are distinguished from the Pogoro of Mahenge highlands and its lowland peripheries by their riverine economy and technology.The technological superiority of the Ndamba lies in their control of canoe transport and grasp of riverine lore, which enables them to slip into vast and complicated waterways and survive there for lengthy periods.For along time, Larson (1976) notes, the Ndamba gained access to the fertile alluvial fans only during the dryseason.