Nutrients Export by Rivers to the Coastal Waters of Africa: Past and Future trends

J.A. Yasin, C. Kroeze, E. Mayorga

Research output: Contribution to journalArticleAcademicpeer-review

46 Citations (Scopus)

Abstract

We analyze past and future trends in nitrogen (N), phosphorus (P), and carbon (C) export by rivers to the coastal waters of Africa as calculated by the Global Nutrient Export to WaterShed (NEWS) models for the period 1970–2050. Between 1970 and 2000 the total nutrient export by African rivers increased by 10–80%. For future years (2000–2050) we calculate an increase in the total loads of dissolved forms of N and P, but decreasing trends for dissolved organic C and particulate forms of N and P. There are large regions that deviate from these pan-African trends. We explore the regional patterns and the underlying processes, in particular for the Nile, Zaire, Niger, and Zambezi. In the future, anthropogenic sources may, in large parts of Africa, become larger contributors to riverine nutrient loads than natural sources
Original languageEnglish
Article numberGB0A07
JournalGlobal Biogeochemical Cycles
Volume24
Issue number4
DOIs
Publication statusPublished - 2010

Keywords

  • west-africa
  • marine ecosystems
  • cabora bassa
  • world rivers
  • nitrogen
  • consequences
  • management
  • pollution
  • eutrophication
  • phosphorus

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