Modeling approaches and strategies for data-scarce aquifers: example of the Dar es Salaam aquifer in Tanzania
| dc.creator | Camp, Marc Van | |
| dc.creator | Mjemah, Ibrahimu Chikira | |
| dc.creator | Farrah, Nawal Al | |
| dc.creator | Walraevens, Kristine | |
| dc.date.accessioned | 2022-12-17T09:41:39Z | |
| dc.date.accessioned | 2025-08-05T07:13:08Z | |
| dc.date.available | 2022-12-17T09:41:39Z | |
| dc.date.created | 2022-12-17T09:41:39Z | |
| dc.date.issued | 2013 | |
| dc.description.abstract | Management of groundwater resources can be improved by using groundwater models to perform risk analyses and to improve development strategies, but a lack of extensive basic data often limits the implementation of sophisticated models. Dar es Salaam in Tanzania is an example of a city where increasing groundwater use in a Pleistocene aquifer is causing groundwater-related problems such as saline intrusion along the coastline, lowering of water-table levels, and contamination of pumping wells. The lack of a water-level monitoring network introduces a problem for basic data collection and model calibration and validation. As a replacement, local watersupply wells were used for measuring groundwater depth, and well-top heights were estimated from a regional digital elevation model to recalculate water depths to hydraulic heads. These were used to draw a regional piezometric map. Hydraulic parameters were estimated from short-time pumping tests in the local wells, but variation in hydraulic conductivity was attributed to uncertainty in well characteristics (information often unavailable) and not to aquifer heterogeneity. A MODFLOW model was calibrated with a homogeneous hydraulic conductivity field and a sensitivity analysis between the conductivity and aquifer recharge showed that average annual recharge will likely be in the range 80–100mm/year. | |
| dc.identifier | 1431-2174 | |
| dc.identifier | http://www.suaire.sua.ac.tz/handle/123456789/4863 | |
| dc.identifier.uri | http://repository.costech.or.tz/handle/20.500.14732/96309 | |
| dc.language | en | |
| dc.publisher | Springer | |
| dc.subject | Africa | |
| dc.subject | Coastal aquifers | |
| dc.subject | Groundwater flow | |
| dc.subject | Over-abstraction | |
| dc.subject | Numerical modeling | |
| dc.title | Modeling approaches and strategies for data-scarce aquifers: example of the Dar es Salaam aquifer in Tanzania | |
| dc.type | Article |