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| Created: | Feb 08, 2023 at 4:38 a.m. | |
| Last updated: | Feb 08, 2023 at 4:39 a.m. | |
| Citation: | See how to cite this resource |
| Sharing Status: | Public |
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Abstract
Increased groundwater extraction leads to the decrease of the extent of wetlands due to the implementation of a water-saving transformation project in an arid irrigation area. The application of integrated mitigation tools and strategies in China have increasing significance. In this study, an integrated approach (SWAT-MODFLOW) was followed; it is based on a soil and water assessment tool (SWAT) coupled with a modular three-dimensional finite difference groundwater model (MODFLOW). Recharge and evaporation values were estimated by SWAT and were then used to simulate groundwater in a MODFLOW model. Calibration (over the years 2000-2010) and validation (over the years 2010-2016) were performed, based on observed groundwater-level data; results showed that the combined SWAT-MODFLOW provides more accurate simulation and prediction of the dynamic changes of surface water and groundwater in irrigation areas than results from individual MODFLOW models. This method was applied to the Yanqi Basin, which is one of the most appropriate arid agricultural basins for modeling lake wetland and groundwater in China. The correlation coefficients (R-2) between the simulated and real groundwater level are 0.96 and 0.91 in SWAT-MODFLOW and MODFLOW, respectively. With the gradual increase in the extraction to 248%, 0.62 x 10(8) m(3) of groundwater discharged into the lake became -2.25 x 10(8) m(3). The lake level drops 1.3 m compared with the current year, when the groundwater exploitation increases by 10 x 10(8) m(3)/year. Overall, the results of the coupling model offer scientific evidence for agricultural water management and lake recovery, so as to enhance the water use coordination.
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Additional Metadata
| Name | Value |
|---|---|
| DOI | 10.3390/w12113225 |
| Depth | 100 |
| Scale | 10 001 - 100 000 km² |
| Layers | 1 |
| Purpose | Groundwater resources |
| GroMoPo_ID | 208 |
| IsVerified | True |
| Model Code | MODFLOW;SEAWAT |
| Model Link | https://doi.org/10.3390/w12113225 |
| Model Time | 1961 - 2017 |
| Model Year | 2020 |
| Model Authors | Jiang, MY; Xie, ST; Wang, SX |
| Model Country | China |
| Data Available | Report/paper only |
| Developer Email | jiangmy2018@lzu.edu.cn; xiesht18@lzu.edu.cn; wangshuixian@lzu.edu.cn |
| Dominant Geology | Model focuses on multiple geologic materials |
| Developer Country | Peoples R China |
| Publication Title | Water Use Conflict and Coordination between Agricultural and Wetlands-A Case Study of Yanqi Basin |
| Original Developer | No |
| Additional Information | This study applies MODFLOW and SWAT-MODFLOW models to simulate groundwater levels in the Yanqi Basin, China, particularly taking into consideration the characteristics of a dry climate and a deep aquifer. It is discovered that the latter’s performance was superior than the former’s performance. In the SWAT model, the sensitivity analysis and parameter calibration of several important parameters affecting runoff simulation results were implemented by using SWAT-CUP software, and the model was verified by using the measured runoff from 1991 to 2017. The results showed that: for the Yanqi Basin in Xinjiang, for long time scales of the simulation of runoff values, there was good agreement with the measured values. |
| Integration or Coupling | Water use;Water management |
| Evaluation or Calibration | Dynamic water levels |
| Geologic Data Availability | Yes |
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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