A hydrogeomorphological approach to quantification of groundwater discharge to streams in South Africa

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dc.contributor.authorXu, Yongxin
dc.contributor.authorHolness, S.D.
dc.contributor.authorZhang, J.
dc.contributor.authorvan Tonder, Gerrit J.
dc.date.accessioned2013-11-14T10:32:29Z
dc.date.available2013-11-14T10:32:29Z
dc.date.issued2002
dc.description.abstractIn South Africa, the flow requirements for maintaining the normal functioning of aquatic ecosystems is termed the “ecological reserve”, and these should be determined when a licence application for water allocation is processed. Determination of the ecological reserve entails investigation of the relationship between the major interactive components of the hydrologic cycle, namely groundwater and surface water bodies including rivers, lakes and estuaries. Information on groundwater discharge towards surface water bodies is critical for the water resource manager to make a decision regarding the amount of groundwater allocation that can be licensed without causing a negative impact on aquatic ecosystems. Existing techniques of hydrograph-separation are too subjective either due to the fact that assumptions of the techniques cannot be met in reality or that the parameters used in models do not have physical meanings. This paper presents a geomorphologic framework under which the quantification of groundwater from a hydrograph is discussed. A focus is placed on hydrogeomorphological typing that can be used to guide a process of separating groundwater discharge time series from hydrographs where a monthly groundwater discharge time series is required for comparison with instream flow requirements. For generating monthly groundwater discharge time series, a generic procedure is proposed, which is applied in a case study.en_US
dc.description.accreditationWeb of Scienceen_US
dc.identifier.citationXu, Y. (2002). A hydrogeomorphological approach to quantification of groundwater discharge to streams in South Africa. Water SA, 28(4): 375-380en_US
dc.identifier.issn0378-4738
dc.identifier.urihttp://hdl.handle.net/10566/812
dc.language.isoenen_US
dc.privacy.showsubmitterfalse
dc.publisherWater Research Commissionen_US
dc.rights© 2002 Water Research Commission. This file may be freely used provided that the source is acknowledged. No commercial distribution of this text is permitted.
dc.status.ispeerreviewedtrue
dc.subjectGroundwateren_US
dc.subjectSouth Africaen_US
dc.titleA hydrogeomorphological approach to quantification of groundwater discharge to streams in South Africaen_US
dc.typeArticleen_US

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