Application assessment of GRACE and CHIRPS data in the Google Earth Engine to investigate their relation with groundwater resource changes (Northwestern region of Iran)
In recent years, drought has become a global issue, especially in arid and semi-arid areas. It is without doubt that the identification and monitoring of the drought phenomenon can help to reduce the damages that would occur. In addition, rain is one of the factors which directly affect the water le...
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| Format: | Article |
| Language: | English |
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Groundwater Science and Engineering Limited
2021-06-01
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| Series: | Journal of Groundwater Science and Engineering |
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| Online Access: | https://www.sciopen.com/article/10.19637/j.cnki.2305-7068.2021.02.002 |
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| author | Afraz Mehdi Eftekhari Mobin Akbari Mohammad Ali Haji Elyasi Noghani Zahra |
| author_facet | Afraz Mehdi Eftekhari Mobin Akbari Mohammad Ali Haji Elyasi Noghani Zahra |
| author_sort | Afraz Mehdi |
| collection | DOAJ |
| description | In recent years, drought has become a global issue, especially in arid and semi-arid areas. It is without doubt that the identification and monitoring of the drought phenomenon can help to reduce the damages that would occur. In addition, rain is one of the factors which directly affect the water levels of underground water reservoirs. This research applied a linear gradient regression method developed on the basis of GRACE, CHIRPS, and data from monitoring wells to investigate the groundwater storage changes. These data have been analyzed on the Google Earth Engine platform. In order to conduct temporal and spatial analyses, the water levels of the aquifer were generated from the monitoring wells and zoned into five classes. Also, the amount of water storage and rain from the year 2003 to 2017 in the West Azerbaijan Province were investigated using the GRACE satellite and the CHIRPS data, respectively. The results obtained from the GRACE satellite data show that the average water level in the underground reservoirs in Iran had started to decrease since 2008 and reached its peak in 2016 with an average decrease of 16 cm in that year. The average annual decline of groundwater level in the studied time period was 5 cm. A chart developed from the CHIRPS annual rainfall data indicates that the biggest decline in rainfall occurred in 2008, and the declining trend has remained steady. Linear analyses were made on GRACE with CHIRPS results and monitoring wells data separately, from which the correlation coefficients are between 86% and 97%, showing generally high correlations. Furthermore, the results obtained from the zoning of the aquifer showed that in the period of 2004 to 2016, due to the decrease in rainfall and the excessive withdrawal of groundwater, the water levels also decreased. |
| first_indexed | 2024-04-09T16:14:37Z |
| format | Article |
| id | doaj.art-62ce5d0fb89e4e979cf26ee03133fceb |
| institution | Directory Open Access Journal |
| issn | 2305-7068 |
| language | English |
| last_indexed | 2024-04-09T16:14:37Z |
| publishDate | 2021-06-01 |
| publisher | Groundwater Science and Engineering Limited |
| record_format | Article |
| series | Journal of Groundwater Science and Engineering |
| spelling | doaj.art-62ce5d0fb89e4e979cf26ee03133fceb2023-04-24T05:59:38ZengGroundwater Science and Engineering LimitedJournal of Groundwater Science and Engineering2305-70682021-06-019210211310.19637/j.cnki.2305-7068.2021.02.002Application assessment of GRACE and CHIRPS data in the Google Earth Engine to investigate their relation with groundwater resource changes (Northwestern region of Iran)Afraz Mehdi0Eftekhari Mobin1Akbari Mohammad2Ali Haji Elyasi3Noghani Zahra4Forests, Range and Watershed Management Organization, Tehran, IranYoung Researchers and Elite Club, Mashhad Branch, Islamic Azad University, Mashhad, IranDepartment of Civil Engineering, University of Birjand, Birjand, IranK. N. Toosi University of Technology, Tehran, IranMaster Research Institute of Forest and Rangeland, Tehran, IranIn recent years, drought has become a global issue, especially in arid and semi-arid areas. It is without doubt that the identification and monitoring of the drought phenomenon can help to reduce the damages that would occur. In addition, rain is one of the factors which directly affect the water levels of underground water reservoirs. This research applied a linear gradient regression method developed on the basis of GRACE, CHIRPS, and data from monitoring wells to investigate the groundwater storage changes. These data have been analyzed on the Google Earth Engine platform. In order to conduct temporal and spatial analyses, the water levels of the aquifer were generated from the monitoring wells and zoned into five classes. Also, the amount of water storage and rain from the year 2003 to 2017 in the West Azerbaijan Province were investigated using the GRACE satellite and the CHIRPS data, respectively. The results obtained from the GRACE satellite data show that the average water level in the underground reservoirs in Iran had started to decrease since 2008 and reached its peak in 2016 with an average decrease of 16 cm in that year. The average annual decline of groundwater level in the studied time period was 5 cm. A chart developed from the CHIRPS annual rainfall data indicates that the biggest decline in rainfall occurred in 2008, and the declining trend has remained steady. Linear analyses were made on GRACE with CHIRPS results and monitoring wells data separately, from which the correlation coefficients are between 86% and 97%, showing generally high correlations. Furthermore, the results obtained from the zoning of the aquifer showed that in the period of 2004 to 2016, due to the decrease in rainfall and the excessive withdrawal of groundwater, the water levels also decreased.https://www.sciopen.com/article/10.19637/j.cnki.2305-7068.2021.02.002gracegroundwater storagechirpsmiddle east region |
| spellingShingle | Afraz Mehdi Eftekhari Mobin Akbari Mohammad Ali Haji Elyasi Noghani Zahra Application assessment of GRACE and CHIRPS data in the Google Earth Engine to investigate their relation with groundwater resource changes (Northwestern region of Iran) Journal of Groundwater Science and Engineering grace groundwater storage chirps middle east region |
| title | Application assessment of GRACE and CHIRPS data in the Google Earth Engine to investigate their relation with groundwater resource changes (Northwestern region of Iran) |
| title_full | Application assessment of GRACE and CHIRPS data in the Google Earth Engine to investigate their relation with groundwater resource changes (Northwestern region of Iran) |
| title_fullStr | Application assessment of GRACE and CHIRPS data in the Google Earth Engine to investigate their relation with groundwater resource changes (Northwestern region of Iran) |
| title_full_unstemmed | Application assessment of GRACE and CHIRPS data in the Google Earth Engine to investigate their relation with groundwater resource changes (Northwestern region of Iran) |
| title_short | Application assessment of GRACE and CHIRPS data in the Google Earth Engine to investigate their relation with groundwater resource changes (Northwestern region of Iran) |
| title_sort | application assessment of grace and chirps data in the google earth engine to investigate their relation with groundwater resource changes northwestern region of iran |
| topic | grace groundwater storage chirps middle east region |
| url | https://www.sciopen.com/article/10.19637/j.cnki.2305-7068.2021.02.002 |
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