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| Created: | Feb 08, 2023 at 4:57 a.m. | |
| Last updated: | Feb 08, 2023 at 4:57 a.m. | |
| Citation: | See how to cite this resource |
| Sharing Status: | Public |
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| Views: | 556 |
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Abstract
Traditional numerical models usually use extensive observed hydraulic-head data as calibration targets. However, this calibration process is not applicable in remote areas with limited or no monitoring data. This study presents an approach to calibrate a large-scale groundwater flow model using the monthly Gravity Recovery and Climate Experiment (GRACE) satellite data, which have been available globally on a spatial grid of 1A degrees in the geographic coordinate system since 2002. A groundwater storage anomaly isolated from the terrestrial water storage (TWS) anomaly is converted into hydraulic head at the center of the grid, which is then used as observed data to calibrate a numerical model to estimate aquifer hydraulic conductivity. The aquifer system in the remote and hyperarid Qaidam Basin, China, is used as a case study to demonstrate the applicability of this approach. A groundwater model using FEFLOW is constructed for the Qaidam Basin and the GRACE-derived groundwater storage anomaly over the period 2003-2012 is included to calibrate the model, which is done using an automatic estimation method (PEST). The calibrated model is then run to output hydraulic heads at three sites where long-term hydraulic head data are available. The reasonably good fit between the calculated and observed hydraulic heads, together with the very similar groundwater storage anomalies from the numerical model and GRACE data, demonstrate that this approach is generally applicable in regions of groundwater data scarcity.
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Additional Metadata
| Name | Value |
|---|---|
| DOI | 10.1007/s10040-015-1278-6 |
| Depth | 1900 |
| Scale | Other |
| Layers | 3 |
| Purpose | Groundwater resources |
| GroMoPo_ID | 221 |
| IsVerified | True |
| Model Code | Feflow |
| Model Link | https://doi.org/10.1007/s10040-015-1278-6 |
| Model Time | 2003-2012 |
| Model Year | 2015 |
| Model Authors | Hu, LT; Jiao, JJ |
| Model Country | China |
| Data Available | Report/paper only |
| Developer Email | litanghu@bnu.edu.cn; jjiao@hku.hk |
| Dominant Geology | Model focuses on multiple geologic materials |
| Developer Country | Peoples R China |
| Publication Title | Calibration of a large-scale groundwater flow model using GRACE data: a case study in the Qaidam Basin, China |
| Original Developer | No |
| Additional Information | |
| Integration or Coupling | None of the above |
| Evaluation or Calibration | GRACE storage anomaly |
| 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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