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GIS-hydrological modelling in arid lands : a geographical synthesis of surface waters for the African Red Sea region in the Sudan

Osman, Badr-Eldin Taha (1996)
Abstract (Swedish)
Popular Abstract in Swedish

Forskning och studier av ytvattensystem i sudanesiska röda havsområdet för utveckling av relevant metodik medför ett antal konceptuella svårigheter. Ett huvudsakligt problem är den begränsade tillgången till litteratur och mätdata för modellutveckling. En annan svårighet är tillämpligheten av redan existerande metoder och modeller utvecklade i andra regioner.



För att besvara dessa frågor måste nya geovetenskapliga metoder tillämpas och integreras. GIS-hydrologi eller ‘spatial hydrologi’ utgör ett viktigt exempel på dessa nya forskningsinriktningar inom geovetenskapen. Den slutliga frågan blir hur geografiska informationssystem (GIS) kan användas och integreras för att realisera... (More)
Popular Abstract in Swedish

Forskning och studier av ytvattensystem i sudanesiska röda havsområdet för utveckling av relevant metodik medför ett antal konceptuella svårigheter. Ett huvudsakligt problem är den begränsade tillgången till litteratur och mätdata för modellutveckling. En annan svårighet är tillämpligheten av redan existerande metoder och modeller utvecklade i andra regioner.



För att besvara dessa frågor måste nya geovetenskapliga metoder tillämpas och integreras. GIS-hydrologi eller ‘spatial hydrologi’ utgör ett viktigt exempel på dessa nya forskningsinriktningar inom geovetenskapen. Den slutliga frågan blir hur geografiska informationssystem (GIS) kan användas och integreras för att realisera ytvattenstudier i den utvalda arida regionen. (Less)
Abstract
The magnitude and availability of surface waters in the arid/semi-arid Sudanese Red Sea region has been examined. In conjunction with the research objective, opinions and methodologies applied by previous researchers have been assessed. The study applied a geographical hydrological synthesis within a GIS framework. As a system with advanced geo-modelling capabilities, GIS is used to integrate spatial analysis with hydrological modelling. Broadly speaking, several levels of spatial hydrological modelling such as parameterisation, spatial integration, regionalisation and hydrologic problems synthesis and assessment have been considered.



Briefly speaking, the study generated and applied four physical and stochastic models... (More)
The magnitude and availability of surface waters in the arid/semi-arid Sudanese Red Sea region has been examined. In conjunction with the research objective, opinions and methodologies applied by previous researchers have been assessed. The study applied a geographical hydrological synthesis within a GIS framework. As a system with advanced geo-modelling capabilities, GIS is used to integrate spatial analysis with hydrological modelling. Broadly speaking, several levels of spatial hydrological modelling such as parameterisation, spatial integration, regionalisation and hydrologic problems synthesis and assessment have been considered.



Briefly speaking, the study generated and applied four physical and stochastic models at both the catchment and regional levels. Firstly, the models and the results are evaluated using the general error term to compute the differences between the estimated areal runoff and the observed runoff in the Khor Gwob catchment. Secondly, a stochastically explained model (STD) has been selected (out of four deterministic and stochastic models) and regionalised. The validity of the catchment and regional runoff estimates in the Sudanese Red Sea region is evaluated in relation to errors inherent in spatial databases, GIS analysis, and hydrological models (e.g., the Rational Formula). Furthermore, the spatial scaling of the applied model (e.g., from catchment to a region) is also considered.



Finally, it is concluded that the study area and the Sudanese Red Sea region at large, contributes an annual surface runoff that exceeds the human and animal requirements with a considerable surplus that can be used for agriculture (i.e., the region is water sufficient). Conversely, this sufficiency may be faced with the problem of spatial distribution and related storage difficulties (i.e., evaporation). With regard to human, animal and agricultural water supply, only few catchments can support the proposition of water sufficiency in the region. (Less)
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author
opponent
  • Prof. Skidmore, Andrew K., Vegetation and Agricultural Survey, International Institute for Aerospace Survey and Earth Sciences (ITC), P.O. Box 6, 7500 BH Enschede, The Netherlands
publishing date
type
Thesis
publication status
published
subject
keywords
teknisk geografi, Hydrogeology, geographical and geological engineering, Hydrogeologi, teknisk geologi, runoff., infiltration, evaporation, rainfall, deterministic and stochastic explanations, weighting methods, hydrological modelling, spatial modelling, GIS, geographical hydrology, the Sudanese Red Sea region, arid lands, water resources
pages
202 pages
publisher
Lund University Press
defense location
Department of Physical Geography’s lecture Hall No. 308, 3rd Floor, Sölvegatan 13, Lund
defense date
1996-12-19 10:15
external identifiers
  • other:ISRN: LUNBDS/NBNG--96/1130--SE
  • scopus:0030368087
ISSN
0346-6787
ISBN
0-86238-469-9
91-7966-397-4
language
English
LU publication?
no
id
71d9a53f-1425-4b9e-b8a6-dc0d66b2b653 (old id 17659)
date added to LUP
2007-05-24 09:16:46
date last changed
2017-01-01 07:18:29
@phdthesis{71d9a53f-1425-4b9e-b8a6-dc0d66b2b653,
  abstract     = {The magnitude and availability of surface waters in the arid/semi-arid Sudanese Red Sea region has been examined. In conjunction with the research objective, opinions and methodologies applied by previous researchers have been assessed. The study applied a geographical hydrological synthesis within a GIS framework. As a system with advanced geo-modelling capabilities, GIS is used to integrate spatial analysis with hydrological modelling. Broadly speaking, several levels of spatial hydrological modelling such as parameterisation, spatial integration, regionalisation and hydrologic problems synthesis and assessment have been considered.<br/><br>
<br/><br>
Briefly speaking, the study generated and applied four physical and stochastic models at both the catchment and regional levels. Firstly, the models and the results are evaluated using the general error term to compute the differences between the estimated areal runoff and the observed runoff in the Khor Gwob catchment. Secondly, a stochastically explained model (STD) has been selected (out of four deterministic and stochastic models) and regionalised. The validity of the catchment and regional runoff estimates in the Sudanese Red Sea region is evaluated in relation to errors inherent in spatial databases, GIS analysis, and hydrological models (e.g., the Rational Formula). Furthermore, the spatial scaling of the applied model (e.g., from catchment to a region) is also considered.<br/><br>
<br/><br>
Finally, it is concluded that the study area and the Sudanese Red Sea region at large, contributes an annual surface runoff that exceeds the human and animal requirements with a considerable surplus that can be used for agriculture (i.e., the region is water sufficient). Conversely, this sufficiency may be faced with the problem of spatial distribution and related storage difficulties (i.e., evaporation). With regard to human, animal and agricultural water supply, only few catchments can support the proposition of water sufficiency in the region.},
  author       = {Osman, Badr-Eldin Taha},
  isbn         = {0-86238-469-9},
  issn         = {0346-6787},
  keyword      = {teknisk geografi,Hydrogeology,geographical and geological engineering,Hydrogeologi,teknisk geologi,runoff.,infiltration,evaporation,rainfall,deterministic and stochastic explanations,weighting methods,hydrological modelling,spatial modelling,GIS,geographical hydrology,the Sudanese Red Sea region,arid lands,water resources},
  language     = {eng},
  pages        = {202},
  publisher    = {Lund University Press},
  title        = {GIS-hydrological modelling in arid lands : a geographical synthesis of surface waters for the African Red Sea region in the Sudan},
  year         = {1996},
}