Climate Variability and Change—Hydrological Impacts (Proceedings of the Fifth FRIEND World Conference held at Havana, Cuba, November 2006), IAHS Publ. 308, 2006, 37–43.

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Hydrological assessment of Makanya catchment in South Pare Mountains, semiarid northern Tanzania

MARLOES L. MUL^1,2, HUBERT H. G. SAVENIJE^1,3, STEFAN UHLENBROOK¹ & MAURITS P. VOOGT³

1 UNESCO-IHE, Institute for Water Education, PO Box 3015, 2601 DA Delft, The Netherlands

m.mul@unesco-ihe.org

2 Department of Civil Engineering, University of Zimbabwe, PO Box MP600, Mt. Pleasant, Harare, Zimbabwe

3 Faculty of Civil Engineering and Geosciences, Delft University of Technology, PO Box 5048, 2600 GA Delft, The Netherlands

Abstract This paper focuses on a catchment in northern Tanzania, the Makanya catchment in the South Pare Mountains, where people have only recently started monitoring rainfall and runoff. The main interest of this research is to assess the hydrological situation in this widely ungauged catchment, both in the past and the present, and special attention is given to different scales. The largest scale is the Makanya catchment with an area of 320 km2, and the smallest scale the Vudee sub-catchment with an area of 24 km2. The ungauged history of the hydrology has been assessed through interviews and transect walks with local elders. Subsequently a timeline has been established of the hydrology and related driving forces. This has been compared to the meteorological data observed in a nearby catchment. A multiple linear regression (MLR) model for the Vudee sub-catchment based on the 2004–2005 data set was used to assess the current state of the hydrology.

Key words PUB; ungauged basin; conceptual model; historical runoff; rainfall trends

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