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Abstrakty
The research analysed morphological variations of the Woji River between 1986 and 2016 using mathematical extrapolations and temporal data. A 50% reduction in the River mean channel width, full-bank discharge and the stream power was found. Channel siltation occurred due to high sediment fluxes from rapid urban processes versus reduced stream power of the river. Water hyacinth invasion, domestic waste dumps and narrow culvers constricted the river channels. Finally, an impaired river status was found and extinction projected by 2043. Recommended were correction and monitoring exercises to check activities along the river channel and to restore the head stream wetlands.
Czasopismo
Rocznik
Tom
Strony
45--54
Opis fizyczny
Bibliogr. 20 poz., rys.
Twórcy
autor
- Department of Geography and Environmental Management, University of Port Harcourt, Nigeria
autor
- Department of Geography and Environmental Management, University of Port Harcourt, Nigeria
autor
- Department of Geography and Environmental Management, University of Port Harcourt, Nigeria
Bibliografia
- Adebayo W., Arohunsoro J.S., 2014. Environmental Effects of Urbanization of River Ajilosun Drainage Basin in Ado-Ekiti, Ekiti State, Nigeria. Journal of Natural Science Research 4(2): 113–124.
- Arokoyu S.B., Weli V.E., 2008. Urban Flood Prediction in a Sub-Humid Tropical city: Implications for urban land use planning in Port Harcourt, Nigeria. Tropical Focus 9(2). Pacificam Douala.
- Boix-Fayos C., Barbera G.G., Lopez-Bermudez F., Castillo V.M., 2007. Effects of check dams, reforestation and land-use changes on river channel morphology: Case study of the Rogativa catchment (Murcia, Spain). Geomorphology 91(1–2): 103–123.
- Booth D.B., 1991. Urbanization and the Natural Drainage System – Impacts, Solutions, and Prognoses. The NorthWest Environmental Journal 7(1): 93–118.
- Chin A., 2006. Urban Transformation of River Landscapes in a global contex. Geomorphology 79(3–4): 460–487.
- Goudie A. (ed.), 1991. Geomorphological Technics. Allen and Unwin.
- Herschy R.W., 1995. Streamflow Measurement. CRC Press.
- Lewin J., Manton M.M.M., 1975. Welsh floodplain studies: The nature of floodplain geometry. Journal of Hydrology 25 (1–2): 37–50.
- Merki P.J., 1970. Structural Geology of the Cenozoic Niger Delta. African Geology, University of Ibadan, Ibadan: 251–265.
- NMA [Nigerian Meteorological Agency], 2008. Nigerian Climate Review.
- NPopC [National Population Commission], 2010. Population Distribution by Sex, State, LGA and Senatorial Districts. Abuja, Nigeria.
- Ofomata, G. E. (2009). Basi Geomorphology for Africa. Enugu – Nigeria: Jamoe Publishers.
- Oyegun C.U., 1997. The Human Environment: Its Form and Processes. Port Harcourt: Jeson Services Ltd.
- Oyegun C.U., Adeyemo A., 1999. Port Harcourt Region. A Paragraphics, Port Harcourt.
- Paul M.J., Meyer J.L., 2001. Streams In The Urban Landscape. Annual Review of Ecology Systems 32: 333–65.
- Torresan L.Z., 2015. What We Do: River Studies. Washinton, USA: U.S. Department of the Interior / U.S. Geological Survey.
- Umeuduji J.E., Aisuebeogun A., 1999. Relief and drainage in Port Harcourt Region. In: C.U.Oyegun, A.Adeyemo (eds), A Paragraphics, Port Harcourt.
- UNDP [United Nations Development Programme], 2004. Reducing disaster risk: a challenge fordevelopment. United Nations Development Programme, New York: 1–161.
- Weli V.E., Ideki O., 2014. The Effect of Urbanization on Channel Adjustment and Flood Vulnerability of Woji Basin, Rivers State, Nigeria. Journal of Natural Sciences Research 4(10): 86–93.
- Zhu B., Li Y., Yue Y., Yang Y., 2017. Aggravation of North Channels’ Shrinkage and South Channels’ Development in the Yangtze Estuary under Dam Induced Runoff Discharge Flattening. Estuarine, Coastal and Shelf Science 187:178–192.
Uwagi
PL
Opracowanie w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-a8ad89bb-58eb-4fd6-a52e-4ae4dd0fcc46