The hydraulic conductivity field and groundwater flow in the unconfined aquifer system of the Keta Strip,Ghana |
| |
| Affiliation: | 1. Health Physics Division, Bhabha Atomic Research Centre, Trombay, Mumbai, India;2. Civil Engineering Department, Indian Institute of Technology Bombay, Powai, India;3. Radiation Safety Systems Division, Bhabha Atomic Research Centre, Mumbai, India;1. Geological Engineering Department, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana;2. Regional Water and Environmental Sanitation Centre, Civil Engineering Department, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana;1. Agricultural Engineering Department, Faculty of Engineering Sciences, University of Ghana, Legon, Accra, Ghana;2. Department of Agroecology, Faculty of Science and Technology, Aarhus University, Tjele, Denmark;3. Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Taastrup, Denmark;4. Soil Science Department, College of Agriculture and Consumer Sciences, University of Ghana, Legon, Accra, Ghana;5. Crop Science Department, College of Agriculture and Consumer Sciences, University of Ghana, Legon, Accra, Ghana;1. Department of Earth Science, University of Ghana, Legon, Accra, Ghana;2. Ghana Atomic Energy Commission, Kwabenya, Accra, Ghana;3. Ministry of Lands and Natural Resources, Ghana |
| |
| Abstract: | This study investigates the hydraulic conductivity field and the groundwater flow pattern as predicted by a calibrated steady state groundwater flow model for the Keta Strip, southeastern Ghana. The hydraulic conductivity field is an important parameter in evaluating aquifer properties in space, and in general basin-wide groundwater resources evaluation and management. This study finds that the general hydraulic conductivity of the unconsolidated unconfined aquifer system of the Keta Strip ranges between 2 m/d and 20 m/d, with an average of 15 m/d. The spatial variation in horizontal hydraulic conductivity appears to take the trend in the variations in the nature of the material in space. Calibrated groundwater recharge suggests that 6.9–34% of annual precipitation recharges the shallow aquifer system. This amount of recharge is significant and suggests high fortunes in terms of groundwater resources development for agriculture and industrial activities in the area. A spatial distribution of groundwater recharge from precipitation is presented in this study. The spatial pattern appears to take the form of the distribution in horizontal hydraulic conductivity, and suggests that the vertical hydraulic conductivity takes the same pattern of spatial variation as the horizontal hydraulic conductivity. This is consistent with observations in other areas. The resulting groundwater flow is dominated by local flow systems as the unconfined system is quite shallow. A general northeast – southwest flow pattern has been observed in the study area. |
| |
| Keywords: | Keta Strip MODFLOW Recharge Hydraulic conductivity Unconfined aquifer |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
