Sedimentation changes in the Breede River estuary: A study of sedimentation changes on the flood tide delta in the estuary, with reference to the hydrology of the river

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dc.contributor.advisorMeadows, Michael Een_ZA
dc.contributor.authorDe Villiers, Louisen_ZA
dc.date.accessioned2016-02-29T11:59:52Z
dc.date.available2016-02-29T11:59:52Z
dc.date.issued1988en_ZA
dc.description.abstractThe study examines sedimentation changes on the flood tide delta in the Breede River estuary since 1942, and relates these changes in sedimentation to changes in the hydrology of the river, as a consequence of damming the river and its tributaries. Sequential aerial photography is used to determine changes in the extent of the Zostera beds on the flood delta, this being indicative of changes in the substrate sediments. Four cores were taken from the flood delta, and standard grainsize analysis techniques employed to establish the composition and characteristics of the sediments. Together with survey work and other ancillary information, these twci techniques enable description of the sedimentation changes and the present sediment dynamics on the flood tide delta. Virgin catchment runoff was simulated using two models, having rainfall data as the primary input. Simulated and actual runoff, as determined from gauge plate data, were qualitatively compared in terms of mean monthly runoff and cumulative annual runoff. This, together with an examination of temporal increases in the total volume of water impounded in the catchment, enables the impact of dams on the hydrology of the river to be determined. It is found that there has been a virtually complete annihilation of the mudflat the Zostera beds, a concomitant loss of the areas, and that the sediments presently occurring on the flood delta are almost wholly of marine origin. Temporally, these changes correlate well with increased impoundment of runoff in the catchment. It is concluded that there has been an increase in marine sedimentation on the flood tide delta, and that this change in sedimentation is directly related to and consequent upon changes in the hydrology of the river as a result of impounding catchment runoff.en_ZA
dc.identifier.apacitationDe Villiers, L. (1988). <i>Sedimentation changes in the Breede River estuary: A study of sedimentation changes on the flood tide delta in the estuary, with reference to the hydrology of the river</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Environmental and Geographical Science. Retrieved from http://hdl.handle.net/11427/17329en_ZA
dc.identifier.chicagocitationDe Villiers, Louis. <i>"Sedimentation changes in the Breede River estuary: A study of sedimentation changes on the flood tide delta in the estuary, with reference to the hydrology of the river."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Environmental and Geographical Science, 1988. http://hdl.handle.net/11427/17329en_ZA
dc.identifier.citationDe Villiers, L. 1988. Sedimentation changes in the Breede River estuary: A study of sedimentation changes on the flood tide delta in the estuary, with reference to the hydrology of the river. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - De Villiers, Louis AB - The study examines sedimentation changes on the flood tide delta in the Breede River estuary since 1942, and relates these changes in sedimentation to changes in the hydrology of the river, as a consequence of damming the river and its tributaries. Sequential aerial photography is used to determine changes in the extent of the Zostera beds on the flood delta, this being indicative of changes in the substrate sediments. Four cores were taken from the flood delta, and standard grainsize analysis techniques employed to establish the composition and characteristics of the sediments. Together with survey work and other ancillary information, these twci techniques enable description of the sedimentation changes and the present sediment dynamics on the flood tide delta. Virgin catchment runoff was simulated using two models, having rainfall data as the primary input. Simulated and actual runoff, as determined from gauge plate data, were qualitatively compared in terms of mean monthly runoff and cumulative annual runoff. This, together with an examination of temporal increases in the total volume of water impounded in the catchment, enables the impact of dams on the hydrology of the river to be determined. It is found that there has been a virtually complete annihilation of the mudflat the Zostera beds, a concomitant loss of the areas, and that the sediments presently occurring on the flood delta are almost wholly of marine origin. Temporally, these changes correlate well with increased impoundment of runoff in the catchment. It is concluded that there has been an increase in marine sedimentation on the flood tide delta, and that this change in sedimentation is directly related to and consequent upon changes in the hydrology of the river as a result of impounding catchment runoff. DA - 1988 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1988 T1 - Sedimentation changes in the Breede River estuary: A study of sedimentation changes on the flood tide delta in the estuary, with reference to the hydrology of the river TI - Sedimentation changes in the Breede River estuary: A study of sedimentation changes on the flood tide delta in the estuary, with reference to the hydrology of the river UR - http://hdl.handle.net/11427/17329 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/17329
dc.identifier.vancouvercitationDe Villiers L. Sedimentation changes in the Breede River estuary: A study of sedimentation changes on the flood tide delta in the estuary, with reference to the hydrology of the river. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Environmental and Geographical Science, 1988 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/17329en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Environmental and Geographical Scienceen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherEnvironmental and Geographical Scienceen_ZA
dc.titleSedimentation changes in the Breede River estuary: A study of sedimentation changes on the flood tide delta in the estuary, with reference to the hydrology of the riveren_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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