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| DOI | 10.3390/w16050763 |
| Groundwater Hydrochemistry and Recharge Process Impacted by Human Activities in an Oasis-Desert in Central Asia | |
| 发表日期 | 2024 |
| EISSN | 2073-4441 |
| 起始页码 | 16 |
| 结束页码 | 5 |
| 卷号 | 16期号:5 |
| 英文摘要 | Intense anthropogenic activities in arid regions remarkably affect groundwater by causing phreatic decline and water environmental deterioration. A systematic understanding of groundwater hydrochemical evolution and recharge is critical to regional water, ecological and agricultural security in arid regions, but is not well known in arid oasis-deserts. This research identified groundwater recharge processes and assessed the impact of anthropogenic activities on groundwater hydrochemical evolution in a representative oasis-desert in Central Asia using stable isotopic indicators (delta 2H and delta 18O) and hydrochemical data. Results indicated that the normalized difference vegetation index (NDVI) and cultivated land area exhibited a significant increasing trend during 2000 to 2020. Stable water isotopes and the ionic composition of both groundwater and surface water exhibited obviously spatial heterogeneity and seasonal variation. Generally, the spatial distribution pattern of major dissolved ions for shallow groundwater was consistent and increased along the groundwater flow direction from midstream to downstream. Surface water and groundwater were both characterized by higher delta 18O and total dissolved solids (TDS) in the non-flood season than those in the flood season. Shallow groundwater had a larger seasonal variation in delta 18O and TDS than other water components. Groundwater level in monitored wells generally presented a decreasing trend from 2018 to 2021, accompanied by a decrease in phreatic water TDS and NDVI in the desert area. Gypsum dissolution and weathering of silicate and halite had an important role in forming groundwater hydrochemistry. Anthropogenic activities significantly affected groundwater hydrochemistry and recharge. Shallow groundwater received its primary recharge from surface water and lateral groundwater flow, constituting 73% and 27% of the total recharge, respectively. Agricultural activities and groundwater overexploitation were the main factors for variations in groundwater level and quality in the oasis area, and directly affected groundwater and natural vegetation in the desert area. The results would be helpful to deeply understand groundwater hydrochemical evolution and cycling, and beneficial for groundwater efficient utilization and desert ecosystem restoration in the arid areas. |
| 英文关键词 | groundwater dynamic; stable isotopes; hydrochemistry; recharge; agricultural activities; oasis-desert region |
| 语种 | 英语 |
| WOS研究方向 | Environmental Sciences & Ecology ; Water Resources |
| WOS类目 | Environmental Sciences ; Water Resources |
| WOS记录号 | WOS:001183034400001 |
| 来源期刊 | WATER
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/304714 |
| 作者单位 | Xinjiang University; Xinjiang University; Chinese Academy of Sciences; Xinjiang Institute of Ecology & Geography, CAS |
| 推荐引用方式 GB/T 7714 | . Groundwater Hydrochemistry and Recharge Process Impacted by Human Activities in an Oasis-Desert in Central Asia[J],2024,16(5). |
| APA | (2024).Groundwater Hydrochemistry and Recharge Process Impacted by Human Activities in an Oasis-Desert in Central Asia.WATER,16(5). |
| MLA | "Groundwater Hydrochemistry and Recharge Process Impacted by Human Activities in an Oasis-Desert in Central Asia".WATER 16.5(2024). |
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