SUR LES PROJECTS FUTURS DE L'AISH / ON THE FUTURE PLANS OF IAHS |
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| Authors: | Dr G KOVACS |
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| Institution: | Geologic-Paleontologic Institute, University of Muenster , Corrensstrasse 24, D-4400, Muenster, Germany |
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| Abstract: | Abstract The baseflow characteristics of some of the numerous small basins in southeastern Nigeria have been analysed to estimate the developable groundwater in the basins. It is shown that from 5.62 × 104 to 1.59 × 106 m3 of groundwater can be developed per square kilometre of basin per annum. The relationship between the baseflow characteristics and other attributes of the basins, such as geology and stream density, were studied statistically, leading to the development of empirical equations for predicting the hydrological features of the several ungauged streams in the region. It is shown, for example, that the basin geology (represented as the percentage of sands), the drainage density, the basin area, the baseflow depletion rate and the total groundwater stored in the basin, Qtp, are related by the equation: Qtp = ?1.85 × 109?7.96 × 108 dd+4.18 × 107 gf?2.01 × 106 df+6.25 × 105 wa where dd is drainage density; gf geological factor; df depletion factor; and wa basin area. |
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