Abstract
Kunduchi Beach is located approximately IO kilometres north Of Dar es Salaam City on the coasl of Mainland Tanzania. Currents and sediment concentrations were measured using a multi-sensor self-recording current meter. Waves Were measured using pressure gauges. Some physical features were visually measured. The general orientation of the shoreline is 330 degrees and the tidal flat is characterised by ripples. A1 aboul 150 m from the shoreline, ripples are 7-9 cm high and their wavelength is about 40 cm. Closer to the beach, ripple orientation is 350 degrees: ripple height is 5 cm and ripple wave length is 5 cm. Results from the measurements show that during flood tide the current direction is southerly (an average of 210 degrees) and at high tide the average direction is 150 degrees. The direction of rhe ebb tidal current is northerly (an average of 360 degrees). On the average. the current speed was 0.1 m/s. Signifier-mr waves heights increased with increasing water level, from 0.1 metres in water depth of metres to about 0.4 metres when the water depth reached 2.4 metres. The wave period did not show significant variation with increasing water depth. The average wave period was 8 Suspended sediment concentration varies in phase tide level. Sediment concentration is related with water level by an exponential function C / C max = O. 107 , where D is water depth. There is a remarkable variation Of sediment concentration between the two main seasons. Sediment concentrations are much higher during the southerly winds rhan during the northerly Winds. Imng-shore sediment transport rates are found to be in rhe order of 3xl (J 8 m3/s per linear meter along the beach.
Recommended Citation
Dubi, A. (2004). EVALUATION OF LONG-SHORE SEDIMENT TRANSPORT ON THE KUNDUCHI BEACH TIDAL FLAT, DAR ES SALAAM. Tanzania Journal of Engineering and Technology (TJET), 27(1), 16-24. https://doi.org/https://doi.org/10.52339/tjet.v27i1.340
Publisher Name
University of Dar es Salaam