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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/4148

Title: Comparative analysis of the PRMS and J2000 hydrological models applied to the Sandspruit Catchment, Western Cape, South Africa
Authors: Bugan, RDH
Jovanovic, NZ
De Clercq, WP
Helmschrot, J
Fluegel, WA
Leavesley, GH
Keywords: Sandspruit catchment
Hydrologic modelling
J2000 hydrological model
Semi arid climate
Western Cape
Ecological hazards
Natural resources
River catchments
Issue Date: Dec-2009
Citation: Bugan, RDH, Jovanovic, NZ, De Clercq, WP et al. 2009. Comparative analysis of the PRMS and J2000 hydrological models applied to the Sandspruit Catchment, Western Cape, South Africa. Management of Natural Resources, Sustainable Development and Ecological Hazards, II, pp 391-402
Abstract: The applicability of distributed hydrological models to the semi-arid conditions in the Western Cape was investigated through the application of PRMS and J2000 in the Sandspruit Catchment. The Sandspruit is an annual river, with the catchment receiving 300-400 mm/a of rainfall. The catchment exhibits shallow soils, with the dominant land uses being cultivated lands and pastures. To optimise the parameterisation of the models, 21 boreholes were drilled throughout the catchment for data collection and to get a better conceptual understanding of the catchment’s hydrologic conditions. Field evidence suggests that subsurface flow is the dominant contributor of stream flow and thus the models were calibrated accordingly. The models were run for a 20 year period. Both models were able to match the timing of seasonal hydrograph responses; however they were not able to match annual discharge volumes. Annual discharge was overestimated in certain cases and underestimated in others. Both models exhibited daily Nash-Sutcliffe Efficiencies of below 0.4. As the models were parameterised and calibrated manually, the feasibility of using automatic techniques needs to be investigated
Description: Management of Natural Resources, Sustainable Development and Ecological Hazards, II
URI: http://hdl.handle.net/10204/4148
Appears in Collections:Environmental management
Earth observation
General science, engineering & technology

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