Isotopic characterization and mass balance reveals groundwater recharge pattern in Chaliyar river basin, Kerala, India
Study region: The Chaliyar river basin, Kerala State, India. Study focus: Detailed understanding about spatio-temporal variation in the interaction and exchange of water between surface and sub-surface reservoirs is important for effective watershed management. Spatio-temporal variations in the oxyg...
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| Format: | Article |
| Language: | English |
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Elsevier
2015-09-01
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| Series: | Journal of Hydrology: Regional Studies |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S221458181500004X |
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| author | A. Shahul Hameed T.R. Resmi S. Suraj C. Unnikrishnan Warrier M. Sudheesh R.D. Deshpande |
| author_facet | A. Shahul Hameed T.R. Resmi S. Suraj C. Unnikrishnan Warrier M. Sudheesh R.D. Deshpande |
| author_sort | A. Shahul Hameed |
| collection | DOAJ |
| description | Study region: The Chaliyar river basin, Kerala State, India.
Study focus: Detailed understanding about spatio-temporal variation in the interaction and exchange of water between surface and sub-surface reservoirs is important for effective watershed management. Spatio-temporal variations in the oxygen isotopic composition (δ18O) were used to understand the interaction between groundwater and river water, and to estimate the groundwater recharge from river water in the Chaliyar river basin.
New hydrological insights for the region: Based on the spatio-temporal variation in δ18O values of river and groundwater and fluctuation in ground water levels, following important inferences are made: (1) estimated river water contribution to post-monsoon groundwater recharge is ∼16% in the lowland coastal area of the Chaliyar river basin and 29% in midland region; (2) northeast winter monsoon rains contribute to the groundwater of Chaliyar river basin only in an insignificant manner, and with a delayed response; (3) unlike river water samples which exhibit both seasonal and spatial variation of more than 3‰, the groundwater samples vary only marginally (∼1‰) between the seasons and across the physiographic zones; (4) groundwater samples exhibit inverse altitude gradient in δ18O values in the highland zone, in all the three seasons. This may be due to flow of the isotopically depleted groundwater down the gradient and evaporation of residual water in the upper reaches of the basin. |
| first_indexed | 2024-12-20T18:10:49Z |
| format | Article |
| id | doaj.art-427b2f0abced4dab94722b7601833716 |
| institution | Directory Open Access Journal |
| issn | 2214-5818 |
| language | English |
| last_indexed | 2024-12-20T18:10:49Z |
| publishDate | 2015-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Hydrology: Regional Studies |
| spelling | doaj.art-427b2f0abced4dab94722b76018337162022-12-21T19:30:28ZengElsevierJournal of Hydrology: Regional Studies2214-58182015-09-014PA485810.1016/j.ejrh.2015.01.003Isotopic characterization and mass balance reveals groundwater recharge pattern in Chaliyar river basin, Kerala, IndiaA. Shahul Hameed0T.R. Resmi1S. Suraj2C. Unnikrishnan Warrier3M. Sudheesh4R.D. Deshpande5Isotope Hydrology Division, Centre for Water Resources Development and Management, Kunnamangalam, Kozhikode 673 571, IndiaIsotope Hydrology Division, Centre for Water Resources Development and Management, Kunnamangalam, Kozhikode 673 571, IndiaIsotope Hydrology Division, Centre for Water Resources Development and Management, Kunnamangalam, Kozhikode 673 571, IndiaIsotope Hydrology Division, Centre for Water Resources Development and Management, Kunnamangalam, Kozhikode 673 571, IndiaIsotope Hydrology Division, Centre for Water Resources Development and Management, Kunnamangalam, Kozhikode 673 571, IndiaGeosciences Division, Physical Research Laboratory, Navrangpura, Ahmedabad 380 009, IndiaStudy region: The Chaliyar river basin, Kerala State, India. Study focus: Detailed understanding about spatio-temporal variation in the interaction and exchange of water between surface and sub-surface reservoirs is important for effective watershed management. Spatio-temporal variations in the oxygen isotopic composition (δ18O) were used to understand the interaction between groundwater and river water, and to estimate the groundwater recharge from river water in the Chaliyar river basin. New hydrological insights for the region: Based on the spatio-temporal variation in δ18O values of river and groundwater and fluctuation in ground water levels, following important inferences are made: (1) estimated river water contribution to post-monsoon groundwater recharge is ∼16% in the lowland coastal area of the Chaliyar river basin and 29% in midland region; (2) northeast winter monsoon rains contribute to the groundwater of Chaliyar river basin only in an insignificant manner, and with a delayed response; (3) unlike river water samples which exhibit both seasonal and spatial variation of more than 3‰, the groundwater samples vary only marginally (∼1‰) between the seasons and across the physiographic zones; (4) groundwater samples exhibit inverse altitude gradient in δ18O values in the highland zone, in all the three seasons. This may be due to flow of the isotopically depleted groundwater down the gradient and evaporation of residual water in the upper reaches of the basin.http://www.sciencedirect.com/science/article/pii/S221458181500004XOxygen isotopeMass balanceGroundwater rechargeRiver-connected aquiferHumid tropicIndia |
| spellingShingle | A. Shahul Hameed T.R. Resmi S. Suraj C. Unnikrishnan Warrier M. Sudheesh R.D. Deshpande Isotopic characterization and mass balance reveals groundwater recharge pattern in Chaliyar river basin, Kerala, India Journal of Hydrology: Regional Studies Oxygen isotope Mass balance Groundwater recharge River-connected aquifer Humid tropic India |
| title | Isotopic characterization and mass balance reveals groundwater recharge pattern in Chaliyar river basin, Kerala, India |
| title_full | Isotopic characterization and mass balance reveals groundwater recharge pattern in Chaliyar river basin, Kerala, India |
| title_fullStr | Isotopic characterization and mass balance reveals groundwater recharge pattern in Chaliyar river basin, Kerala, India |
| title_full_unstemmed | Isotopic characterization and mass balance reveals groundwater recharge pattern in Chaliyar river basin, Kerala, India |
| title_short | Isotopic characterization and mass balance reveals groundwater recharge pattern in Chaliyar river basin, Kerala, India |
| title_sort | isotopic characterization and mass balance reveals groundwater recharge pattern in chaliyar river basin kerala india |
| topic | Oxygen isotope Mass balance Groundwater recharge River-connected aquifer Humid tropic India |
| url | http://www.sciencedirect.com/science/article/pii/S221458181500004X |
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