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Sefe, F.T.K. 1998. How much water comes into the Okavango Delta system? A study of the discharge gauging data for the Okavango River at Mohembo. National Institute for Development, Research and Documentation (NIR), University of Botswana


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How much water comes into the Okavango Delta system? A study of the discharge gauging data for the Okavango River at Mohembo.

Summary / Notes:

River gaugings at Mohembo started on a more or less regular basis in 1974. Data of variable length are available on the following parameter: stage, discharge (gauged or estimated from rating curve), cross-sectional area, surface width, mean velocity, mean depth and maximum depth. There is, though, concern about the existence of 'inexplicable' outliers in the stage-discharge plot. This could be due to human error in the recordings of data. The aim of this study, therefore, is to investigate the reason for this instability and how a useful rating curve can be extracted from the available data.

Year: 1998

Type: Report

Origin: Bibliography compiled for Okavango River: The flow of a lifeline.

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Gieske, A. and Obakeng, O. 1997. Modelling outflow from the Jao/Boro River system in the Okavango Delta, Botswana. Journal of Hydrology, 193: 214-239
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Kraatz, D.B. 1976. The Xudum-Xwaapa flow redistribution scheme. Investigation of the Okavango Delta as a Pprimary Water Resource for Botswana, Bot/71/506, Technical note no.17, United Nations Development Program
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Reavel, P.E., Lee, R.E. and White, R.E. 1973. Okavango hydrobiological project, first yearly report, 1972-1973. Department of Botany, University of Witwatersrand, Johannesburg
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Sefe, F.T.K. 1996. A study of the stage-discharge relationship of Okavango River at Mohembo, Botswana. Hydrological Sciences Journal, 41(1): 97-116
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Wilson, B.H. and Dincer, T. 1976. An introduction to the hydrology and hydrography of the Okavango Delta. Okavango Delta Symposium, Proceedings of the Symposium on the Okavango Delta and its future utilization, National Museum, Gaborone, (Botswana Society)
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Biggs, R.C. 1976. The effects of seasonal flood regime on the ecology of Chief's Island and the adjacent floodplain system. Okavango Delta Symposium, Proceedings of the Symposium on the Okavango Delta and its future utilization, National Museum, Gaborone
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Bethune, S. 1987. A limnological baseline survey of the Okavango River in South West Africa/Namibia. 1984-1986. Unpublished report of the Water Quality Division, Department of Water Affairs
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Cronberg, G., Gieske, A., Martins, E., Mengu, J.P. and Stenstrom, I-M. 1995. Hydrobiological studies of the Okavango Delta and Kwando /Lenyanti /Chobe River, Botswana, I surface water quality analysis. Botswana Notes and Records, 27: 151 - 226
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Gieske, A. 1996. Vegetation driven groundwater recharge below Okavango Delta, Botswana as a solute sink mechanism - an indicative model. Boswana Journal of Earth Science, 3: 33-37
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Gieske, A. Influence of shallow groundwater levels on outflow from the Okavango Delta, Botswana. University of Botswana, Geology Department, Gaborone, Botswana
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Gumbricht, T. 2000. Portraying and modeling of the Okavango Delta, Botswana
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McCarthy, T.S., Cooper, G.R.J., Tyson, P.D. and Ellery, W.N. 2000. Seasonal flooding in the Okavango Delta, Botswana - recent history and future prospects. South African Journal of Science, 96: 25-28
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Marques, R. 1997. Climate, hydrology and water resources (Angolan sector). Okavango River Basin Preparatory Assessment Study, OKACOM
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Sutcliffe, J.V. 1976. Hydrological study of the southern Sudd Region of the upper Nile. Okavango Delta Symposium, Proceedings of the Symposium on the Okavango Delta and its future utilization, National Museum, Gaborone, (Botswana Society): 276-299
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Ernest, H.M. 1976. Manipulation of the Okavango Delta for increased outflow: its impact and constraints. Okavango Delta Symposium, Proceedings of the Symposium on the Okavango Delta and its future utilization, National Museum, Gaborone, (Botswana Society)
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Thoralf, M. 1999. Ecological mapping in the research area of the Harry Oppenheimer Okavango Research Centre, Okavango Delta, Botswana. Chapter 7 Discussion, Anhalt University, Germany
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Turton, T., Ashton, P. and Cloete, E. 2003. Transboundary rivers, sovereignty and development: Hydropolitical drivers in the Okavango River basin. African Water Issues Research Unit (AWIRU), Pretoria and Green Cross International (GCI), Geneva
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McCarthy, T.S., Ellery, W.N., Rogers, K.H., Cairncross, B. and Ellery, K. 1986. The roles of sedimentation and plant growth in changing flow patterns in the Okavango Delta, Botswana. South African Journal of Science, 82: 579-584
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