Climate Change Data Portal
| DOI | 10.1016/j.gsd.2024.101171 |
| Spatio-temporal distribution of groundwater recharge under climate change in the Namngum++ river basin in lower Mekong region | |
| Dhungana, Santosh; Shrestha, Sangam; Pradhan, Pragya; Saurav, K. C.; Gupta, Ashim Das; Nguyen, Thi Phuoc Lai | |
| 发表日期 | 2024 |
| ISSN | 2352-801X |
| 起始页码 | 25 |
| 卷号 | 25 |
| 英文摘要 | Groundwater meets the water needs of one third of global population. The erratic nature of rainfall, likely to be exacerbated by climate change further compounded by population growth and urbanization, underscore the crucial role of groundwater in water resources management in Namngum ++ river basin in Lower Mekong. Climate change affects groundwater by altering different hydrological processes such as evapotranspiration, infiltration and most importantly the ground water recharge. This study attempts to quantify groundwater recharge in the basin and how climate change is likely to impact it in three stress periods (2030s, 2060s and 2090s) under socio-economic pathways (SSP 2-4.5 and SSP 5-8.5) scenarios. Precipitation, maximum temperature and minimun temperature datasets from four global climate models (GCMs) under coupled model inter comparison project phase 6 (CMIP6) were linearly bias corrected. The Soil and Water Assessment Tool (SWAT), a semi -distributed model, was then employed to assess climate change impact on groundwater recharge. The model performance was very good with coefficient of determination and Nash Sutcliffe Efficiency of 0.72 and 0.70 for calibration period (2000 - 2010) and 0.80 and 0.77 for validation period (2011 - 2015) respectively. The hydrological response unit (HRU) level groundwater recharge for four GCMs were individually computed then ensembled by averaging across stress periods. Precipitation, minimum temperature and maximum temperature are likely to increase by 8.20%, 1.40 degrees C and 1.60 degrees C for SSP2-4.5 and 11.15%, 1.85 degrees C and 1.96 degrees C for SSP5-8.5 respectively. Groundwater recharge is likely to increase for 2060s and 2090s by 9.31% and 8.31% respectively in SSP2-4.5 and decrease by -3.25% in 2030s while increase up to 2.23% in 2060s and finally decreasing by -1.10% in 2090s in SSP5-8.5. The differences in the direction of change for two scenarios are attributed to increase in evapotranspiration due to elevated temperature, as well as increased stream flow yielded by increased precipitation in SSP5-8.5 compared to SSP2-4.5. While this study acknowledges uncertainties that permeate every step, it still presents a potential future scenario for water management. |
| 英文关键词 | GCM; CMIP6; SSPs; SWAT; Groundwater recharge |
| 语种 | 英语 |
| WOS研究方向 | Engineering ; Environmental Sciences & Ecology ; Water Resources |
| WOS类目 | Engineering, Environmental ; Environmental Sciences ; Water Resources |
| WOS记录号 | WOS:001223544000001 |
| 来源期刊 | GROUNDWATER FOR SUSTAINABLE DEVELOPMENT
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/308726 |
| 作者单位 | Asian Institute of Technology; Asian Institute of Technology; Asian Institute of Technology |
| 推荐引用方式 GB/T 7714 | Dhungana, Santosh,Shrestha, Sangam,Pradhan, Pragya,et al. Spatio-temporal distribution of groundwater recharge under climate change in the Namngum++ river basin in lower Mekong region[J],2024,25. |
| APA | Dhungana, Santosh,Shrestha, Sangam,Pradhan, Pragya,Saurav, K. C.,Gupta, Ashim Das,&Nguyen, Thi Phuoc Lai.(2024).Spatio-temporal distribution of groundwater recharge under climate change in the Namngum++ river basin in lower Mekong region.GROUNDWATER FOR SUSTAINABLE DEVELOPMENT,25. |
| MLA | Dhungana, Santosh,et al."Spatio-temporal distribution of groundwater recharge under climate change in the Namngum++ river basin in lower Mekong region".GROUNDWATER FOR SUSTAINABLE DEVELOPMENT 25(2024). |
| 条目包含的文件 | 条目无相关文件。 | |||||
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
