Modelling The Hydrology Of Large Drainage Basins-Application In The Congo Basin Of Aarica
A GIS-based hydrological model,namely HATWAB-Hybrid atmospheric and Terrestrial Water Balance was developed to compute water resource availability and for simulation of its spatial and temporal distribution over the Congo River Basin (CRB). HATWAB model simulates the integrated moisture convergence (C),soil moisture (SM), actual evapotranspiration (AET) and runoff (ROF). The spatial distribution of the simulated parameters shows a strong correlation with the rainfall and high moisture convergence pattern associated with the equatorial forest region especially between ±5o of latitude with some disturbances in the lowest rainfall regions of the basin located in the south-eastern and the up-north part of the CRB. The Annual average SM varies between 0 and 400 mm while AET varies between 400 and 1700 mm/year with highest values on the water bodies. The total annual grid ROF varies between varies between 50 and 900 mm per year with an average of 324 mm/year. The accumulated ROF computed final outlet of the Congo River Basin reaches 47400 m3/s which is within an error margin of 5 % compared to the observed discharge of 45,000 m3/s. The HATWAB model still proved its ability of simulating water balance for large scale basins such as the CRB if high quality input data are available and well prepared at acceptable resolution.
Congo Basin GIS hydrology model Africa
B.F.ALEMAW J.BAHATI CHISHUGI
Department of Geology,University of Botswana,P.O.Box 45560,Gaborone,Botswana Départemerit de Géologie et Minéralogie,Université Officielle de Bukavu,Bukavu,D.R.Congo
国际会议
International Forum on Water Resources and Sustainable Development(2009水资源与可持续发展高层论坛)
武汉
英文
201-216
2009-09-22（万方平台首次上网日期，不代表论文的发表时间）