Channel dynamics and hydraulic geometry of two tropical deltaic catchments in Southern Nigeria

• Autorzy: Aisuebeogun A. O. , Ezekwe I. C.

Identyfikatory

DOI

http://dx.doi.org/10.12657/landfana.027.007

• Języki publikacji: EN

Abstrakty

EN

This paper attempts to explain the channel processes and dynamics of two river systems running through a rapidly urbanizing humid tropical deltaic environment with visible threats from industrialization and pollution. Hydraulic processes and parameters were compared with established power function relations for hydraulic geometry and it was discovered that the fundamental relations between channel-geometry dimensions, velocity, and flow can be expressed for the catchments. Ten gauging stations in each catchment were studied and results showed that the studied catchments adjust their geometry to changing discharges. High values of coefficients of determination among variables indicated that much of the downstream variation in channel width to depth ratio can be accounted for by changes in discharge. Also in this study the width/depth ratio (F) was found to be related to the percentage of silt + clay (M) in channel perimeter and that downstream hydraulic-geometry relations are in general agreement with previously published hydraulic and channel adjustment data.

Słowa kluczowe

EN

Catchment morphometry; hydraulic processes; Sombreiro River; New Calabar River; Niger Delta

• Wydawca: Stowarzyszenie Geomorfologów Polskich
• Czasopismo: Landform Analysis
• Rocznik: 2014
• Tom: Vol. 27
• Strony: 3--13
• Opis fizyczny: Bibliogr. 42 poz., rys., tab.

Twórcy

autor

Aisuebeogun A. O.

• Department of Geography and Environmental Management, Niger Delta University, Nigeria

autor

Ezekwe I. C.

• Department of Geography and Environmental Management, University of Port Harcourt, Nigeria

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