External nutrient sources for Lake Tanganyika

V.T. Langenberg, S. Nyamushahu, R.M.M. Roijackers, A.A. Koelmans

Research output: Contribution to journalArticleAcademicpeer-review

30 Citations (Scopus)


This study assessed the external nutrient sources for Lake Tanganyika from August 1994 to August 1995. The physico-chemical characteristics of the three largest inflowing rivers (Rusizi, Malagarasi, and Lufubu) and the wet atmospheric deposition in Bujumbura (Burundi), Kigoma (Tanzania), and Mpulungu (Zambia) were analyzed. The magnitude of external loading of P and N were evaluated to determine their potential for supporting biological activity. Seasonal changes in the physico-chemical composition of riverine input were detected and were linked to the altitude and morphology of the river system. A flushing effect was noted. Higher discharge rates corresponded with increased concentrations of most constituents. Rusizi provided the most and Lufubu the least of total riverine nutrient input. Rusizi’s load equalled or almost doubled, depending on the nutrient, the combined loads of the other rivers. Seasonal changes in the atmospheric deposition chemistry were detected and were linked to biomass burning and atmospheric transport processes. Highest atmospheric deposition rates were encountered in more populated and industrialized Bujumbura.
Original languageEnglish
Pages (from-to)169-180
JournalJournal of Great Lakes Research
Issue number2
Publication statusPublished - 2003


  • precipitation chemistry
  • nitrogen
  • impact
  • phytoplankton
  • forest
  • water
  • river

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