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| Created: | Feb 08, 2023 at 3:23 p.m. | |
| Last updated: | Feb 08, 2023 at 3:24 p.m. | |
| Citation: | See how to cite this resource |
| Sharing Status: | Public |
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| Views: | 531 |
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Abstract
The Republic of Djibouti has an area of 23,000 km(2), a coastline 370 km long and a population of 820,000 inhabitants. It experiences an arid climate characterized by high daytime temperatures and low and irregular rainfall (average of 140 mm/year), resulting in continuous periods of drought. These difficult climatic conditions and the absence of perennial surface water have progressively led to an intensive exploitation of groundwater to meet increasing water demands in all sectors (drinking water, agriculture and industries). In coastal areas, seawater intrusion constitutes a significant additional risk of groundwater degradation. This study is focused on the coastal aquifer of Tadjourah which supplies water to the city of Tadjourah, currently comprising 21,000 inhabitants. The main objective of this work is to assess the current resources of this aquifer; its capacity to satisfy, or not, the projected water demands during coming years; and to analyze its vulnerability to seawater intrusion within the frame of climate change. Three RCPs (Representative Concentration Pathway) were used to simulate different climate scenarios up to 2100. The simulated rainfall series allowed to deduce the aquifer recharge up to 2100. The code Seawat was used to model seawater intrusion into the aquifer, using the recharge data deduced from the climate scenarios. The results indicate that the risk of contamination of the Tadjourah coastal aquifer by seawater intrusion is high. The long-term and sustainable exploitation of this aquifer must take into consideration the impact of climate change.
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Additional Metadata
| Name | Value |
|---|---|
| DOI | 10.3390/w11112347 |
| Depth | |
| Scale | 11 - 101 km² |
| Layers | 18 |
| Purpose | Salt water intrusion |
| GroMoPo_ID | 308 |
| IsVerified | True |
| Model Code | SEAWAT |
| Model Link | https://doi.org/10.3390/w11112347 |
| Model Time | |
| Model Year | 2019 |
| Model Authors | Razack, M; Jalludin, M; Houmed-Gaba, A |
| Model Country | Djibouti |
| Data Available | Report/paper only |
| Developer Email | moumtaz.razack@univ-poitiers.fr; mohamed.jalludin@gmail.com; abdogaba@gmail.com |
| Dominant Geology | Model focuses on multiple geologic materials |
| Developer Country | France; Djibouti |
| Publication Title | Simulation of Climate Change Impact on A Coastal Aquifer under Arid Climate. The Tadjourah Aquifer (Republic of Djibouti, Horn of Africa) |
| Original Developer | No |
| Additional Information | |
| Integration or Coupling | Solute transport |
| Evaluation or Calibration | Unsure |
| Geologic Data Availability | No |
How to Cite
This resource is shared under the Creative Commons Attribution CC BY.
http://creativecommons.org/licenses/by/4.0/
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