A comparison of the performance of selected conceptual models of the rainfall-runoff process in semi-arid catchments near Grahamstown
- Authors: Roberts, Peter J T
- Date: 1979
- Subjects: Runoff , Rainfall , South Africa , Grahamstown
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4798 , http://hdl.handle.net/10962/d1001898
- Description: A comparison of the performance of selected conceptual models of the rainfall-runoff process forms the central theme of this study and the comparison was conducted with three major objectives in mind. The first objective was to develop a conceptual model that could be used by practising hydrologists for the refinement and extension of historical streamflow records. The major requirements of the model were that it should be simple in structure and easy to operate and yet be flexible in terms of complexity of structure and input requirements as well as producing output at a level of accuracy that is competitive with that of the more complex models presently available. A comparison of the performance of the required model with that of other models formed an integral part of the development process. The second objective of the comparative study was to contribute to current knowledge of the criteria used in the selection of a suitable model for a particular application. There are, at present, no reliable guidelines to assist the hydrologist in selecting a suitable model from the wide range of models available and a comparative study would indicate the merits of various forms of model structure. The third objective is associated with the problems that arise when no streamflow data are available for model calibration. One approach is to calibrate the model in a nearby gauged catchment that the hydrologist regards as being 'hydrologically similar' and transferring the model parameter values to the ungauged catchment. Little is known about the feasibility of this parameter transfer process or about the choice of a model for such an application. The third objective was to test the feasibility of the parameter transfer process and to make use of the comparison of model performance to determine the model characteristics that are most suitable for the purpose
- Full Text:
- Date Issued: 1979
- Authors: Roberts, Peter J T
- Date: 1979
- Subjects: Runoff , Rainfall , South Africa , Grahamstown
- Language: English
- Type: Thesis , Doctoral , PhD
- Identifier: vital:4798 , http://hdl.handle.net/10962/d1001898
- Description: A comparison of the performance of selected conceptual models of the rainfall-runoff process forms the central theme of this study and the comparison was conducted with three major objectives in mind. The first objective was to develop a conceptual model that could be used by practising hydrologists for the refinement and extension of historical streamflow records. The major requirements of the model were that it should be simple in structure and easy to operate and yet be flexible in terms of complexity of structure and input requirements as well as producing output at a level of accuracy that is competitive with that of the more complex models presently available. A comparison of the performance of the required model with that of other models formed an integral part of the development process. The second objective of the comparative study was to contribute to current knowledge of the criteria used in the selection of a suitable model for a particular application. There are, at present, no reliable guidelines to assist the hydrologist in selecting a suitable model from the wide range of models available and a comparative study would indicate the merits of various forms of model structure. The third objective is associated with the problems that arise when no streamflow data are available for model calibration. One approach is to calibrate the model in a nearby gauged catchment that the hydrologist regards as being 'hydrologically similar' and transferring the model parameter values to the ungauged catchment. Little is known about the feasibility of this parameter transfer process or about the choice of a model for such an application. The third objective was to test the feasibility of the parameter transfer process and to make use of the comparison of model performance to determine the model characteristics that are most suitable for the purpose
- Full Text:
- Date Issued: 1979
Transcending the culture of poverty in a Black South African township
- Authors: Wilsworth, Mercia Joan
- Date: 1979
- Subjects: Black people , South Africa , Grahamstown , Economic conditions
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2085 , http://hdl.handle.net/10962/d1001602
- Full Text:
- Date Issued: 1979
- Authors: Wilsworth, Mercia Joan
- Date: 1979
- Subjects: Black people , South Africa , Grahamstown , Economic conditions
- Language: English
- Type: Thesis , Masters , MA
- Identifier: vital:2085 , http://hdl.handle.net/10962/d1001602
- Full Text:
- Date Issued: 1979
The Sound of Africa: Music of the Ciskei
- Authors: Tracey, Hugh , Tracey, Peggy
- Subjects: Grunting , Harmonica , Roaring , Xhosa , Mbayizelo dance , Pedi , Ciskei , Eastern Cape , South Africa , Ritual , Tribal life , Lessons , Initiation , Abakwetha , Greyish-white clay , Blankets , Grass skirts , Dancing , Drums , Singing , Clapping , Party , Beer , Dress , Ochre , Turban , Umngqungqo , Segregation , Vegetation , Aloes , Fighting songs , Stick fights , Mdudo , Stamping , Imaginary events , Conversations , Humour , Fun , Sketch , Ihoba hobo , Diviners , The Weaver bird , Water , Ancestral spirits , Diviner‘s song , Wedding dance , Leggings of beads , Hymn , Ntsikana‘s Hymn , Girls , Teenagers , Masalila , Town , Grahamstown , Isicatulo , Phuma endlu yam , Double bass , Peddi , Kalana , Kraal , Umdudo , Spear , Pole , Theatrical , Impromptu , Weaverbird , Nqika , Mtshotsho dance , Tuku , Afrcian Pavane , Ntsikana‘s Bell
- Language: English
- Type: Sound , Radio broadcast , Music
- Identifier: vital:15086 , http://hdl.handle.net/10962/d1008514 , Reel number: BC078
- Description: 1st programme in ‘The Sound of Africa‘ Series III of illustrated talks by Hugh Tracey and Peggy Tracey on their travels in search of African music, broadcast by the South African Broadcasting Corporation , For further details refer to the ILAM Document Collection: Hugh Tracey Broadcasts
- Full Text: false
- Authors: Tracey, Hugh , Tracey, Peggy
- Subjects: Grunting , Harmonica , Roaring , Xhosa , Mbayizelo dance , Pedi , Ciskei , Eastern Cape , South Africa , Ritual , Tribal life , Lessons , Initiation , Abakwetha , Greyish-white clay , Blankets , Grass skirts , Dancing , Drums , Singing , Clapping , Party , Beer , Dress , Ochre , Turban , Umngqungqo , Segregation , Vegetation , Aloes , Fighting songs , Stick fights , Mdudo , Stamping , Imaginary events , Conversations , Humour , Fun , Sketch , Ihoba hobo , Diviners , The Weaver bird , Water , Ancestral spirits , Diviner‘s song , Wedding dance , Leggings of beads , Hymn , Ntsikana‘s Hymn , Girls , Teenagers , Masalila , Town , Grahamstown , Isicatulo , Phuma endlu yam , Double bass , Peddi , Kalana , Kraal , Umdudo , Spear , Pole , Theatrical , Impromptu , Weaverbird , Nqika , Mtshotsho dance , Tuku , Afrcian Pavane , Ntsikana‘s Bell
- Language: English
- Type: Sound , Radio broadcast , Music
- Identifier: vital:15086 , http://hdl.handle.net/10962/d1008514 , Reel number: BC078
- Description: 1st programme in ‘The Sound of Africa‘ Series III of illustrated talks by Hugh Tracey and Peggy Tracey on their travels in search of African music, broadcast by the South African Broadcasting Corporation , For further details refer to the ILAM Document Collection: Hugh Tracey Broadcasts
- Full Text: false
- «
- ‹
- 1
- ›
- »