A distributed water balance model to estimate direct groundwater recharge: A case study from the nhoma and khaudum catchments, Namibia select="/dri:document/dri:meta/dri:pageMeta/dri:metadata[@element='title']/node()"/>

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dc.contributor.author Wanke, Heike
dc.contributor.author Dunkeloh, Armin
dc.contributor.author Udluft, Peter
dc.contributor.author Wanke, Ansgar
dc.date.accessioned 2014-07-02T08:23:39Z
dc.date.available 2014-07-02T08:23:39Z
dc.date.issued 2013
dc.identifier.citation Wanke, H., D¨unkeloh, A., Udluft, P., & Wanke, A. (2013). A distributed water balance model to estimate direct groundwater recharge: A case study from the nhoma and khaudum catchments, Namibia. International Science and Technology Journal of Namibia, 2(1), 11-32. en_US
dc.identifier.issn 20267673
dc.identifier.uri http://hdl.handle.net/11070/1266
dc.description.abstract The most important water resource in drylands such as Namibia is groundwater and its recharge including temporal and spatial variations need to be assessed reliably for sustainable water management. In this paper, a grid-based conceptual water balance model with a simplification at the catchment scale level is used to assess groundwater recharge. The reliability of the model predictions are verified by the independent chloride mass balance method. The distributed, process-oriented, physically based water balance model MODBIL used in this study considers the major water balance components and calculates a spatially differentiated water balance by simulating water fluxes and storages at temporal and spatial resolutions based on meteorological, topographic, soil physical, land cover and geological input parameters. In this study it is set up for the upper Khaudum and Nhoma catchments in the Kalahari of north-eastern Namibia and northwestern Botswana at a spatial resolution of 500 x 500 m, calculated daily for a period of 22 years. A mean annual area groundwater recharge of 11.5 mm a􀀀1 is calculated for the catchments, but spatial variations between 0 and 17.5 mm a􀀀1 occur depending on the variability of vegetation, soil and geomorphology. Groundwater recharge only occurred on a few days during the simulation period. en_US
dc.language.iso en en_US
dc.publisher University of Namibia en_US
dc.subject Soil water balance model en_US
dc.subject Namibia en_US
dc.subject Groundwater recharge en_US
dc.subject Kalahari en_US
dc.subject Chloride mass balance en_US
dc.title A distributed water balance model to estimate direct groundwater recharge: A case study from the nhoma and khaudum catchments, Namibia en_US
dc.type Article en_US


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