Checking for non-preferred file/folder path names (may take a long time depending on the number of files/folders) ...
This resource contains some files/folders that have non-preferred characters in their name. Show non-conforming files/folders.
This resource contains content types with files that need to be updated to match with metadata changes. Show content type files that need updating.
| Authors: |
|
|
|---|---|---|
| Owners: |
|
This resource does not have an owner who is an active HydroShare user. Contact CUAHSI (help@cuahsi.org) for information on this resource. |
| Type: | Resource | |
| Storage: | The size of this resource is 1.6 KB | |
| Created: | Feb 08, 2023 at 9:20 p.m. | |
| Last updated: | Feb 08, 2023 at 9:20 p.m. | |
| Citation: | See how to cite this resource |
| Sharing Status: | Public |
|---|---|
| Views: | 675 |
| Downloads: | 215 |
| +1 Votes: | Be the first one to this. |
| Comments: | No comments (yet) |
Abstract
Understanding groundwater recharge processes is important for development of water resources in arid and semi-arid regions. This study sought to build a regional-scale surface water-groundwater model with SWAT-MODFLOW for assessing the spatial distribution of annual and seasonal groundwater recharge and interactions with surface water in the Limpopo River Basin (LRB), Africa. The model was calibrated and evaluated for monthly streamflow from 1984 to 2013 in the basin. Due to the lack of reliable measured water table data, water table elevation was compared to estimates of water table depth reported in the literature for the basin. Simulation results from this study suggest an annual average recharge of almost 0-530mm over the basin while simulations show a range of 1300m in summer to 1400m in autumn for groundwater table elevation. Annual and seasonal analysis show high spatial variability in both water table and recharge. Annual recharge along the Limpopo main river and at the outlet of the basin was high compared to other locations in the basin. Groundwater table appears generally shallow in the rainy east region and along the Limpopo River network. Summer months have the highest groundwater recharge with an average of 147 mm/year over the basin, followed by autumn with an average of 27 mm/year, spring with 3.2 mm/year, and winter having the lowest seasonal recharge of 0.3 mm/year during the 30-year study period. The simulations also suggest high spatial variability in groundwater-surface water interactions in the basin's rivers. Rivers in the southern region show input from groundwater discharge while west river channels appeared to seep to the underlying aquifer. The results can assist with groundwater management by providing insights into areas of high recharge and problematic areas susceptible for water quality pollution, especially where groundwater discharge is experienced.
Subject Keywords
Coverage
Spatial
Content
Additional Metadata
| Name | Value |
|---|---|
| DOI | 10.1016/j.gsd.2019.100260 |
| Depth | 211 |
| Scale | >100 000 km² |
| Layers | 2 |
| Purpose | Groundwater resources |
| GroMoPo_ID | 442 |
| IsVerified | True |
| Model Code | MODFLOW |
| Model Link | https://doi.org/10.1016/j.gsd.2019.100260 |
| Model Time | 1984-2013 |
| Model Year | 2019 |
| Model Authors | Mosase, E; Ahiablame, L; Park, S; Bailey, R |
| Model Country | Botswana, Mozambique, South Africa, Zimbabwe |
| Data Available | Report/paper only |
| Developer Email | mosasee@biust.ac.bw; lmahiablame@ucanr.edu; seonggyu.park@colostate.edu; rtbailey@colostate.edu |
| Dominant Geology | Model focuses on multiple geologic materials |
| Developer Country | USA |
| Publication Title | Modelling potential groundwater recharge in the Limpopo River Basin with SWAT-MODFLOW |
| Original Developer | No |
| Additional Information | |
| Integration or Coupling | Surface water |
| Evaluation or Calibration | Dynamic water levels |
| 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/
Comments
There are currently no comments
New Comment