Groundwater Diffuse Recharge and its Response to Climate Changes in Semi-Arid Northwestern China
Understanding the processes and rates of groundwater recharge in arid and semi-arid areas is crucial for utilizing and managing groundwater resources sustainably. We obtained three chloride profiles of the unsaturated-zone in the desert/loess transition zone of northwestern China and reconstructed t...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Springer
2015-01-01
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| Series: | Terrestrial, Atmospheric and Oceanic Sciences |
| Subjects: | |
| Online Access: |
http://tao.cgu.org.tw/pdf/v264p451.pdf
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| _version_ | 1818007170999910400 |
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| author | Lin Deng Wenke Wang Yanjun Cai Anyan Hu and Liangcheng Tan |
| author_facet | Lin Deng Wenke Wang Yanjun Cai Anyan Hu and Liangcheng Tan |
| author_sort | Lin Deng |
| collection | DOAJ |
| description | Understanding the processes and rates of groundwater recharge in arid and semi-arid areas is crucial for utilizing and managing groundwater resources sustainably. We obtained three chloride profiles of the unsaturated-zone in the desert/loess transition zone of northwestern China and reconstructed the groundwater recharge variations over the last 11, 21, and 37 years, respectively, using the generalized chloride mass balance (GCMB) method. The average recharge rates were 43.7, 43.5, and 45.1 mm yr-1, respectively, which are similar to those evaluated by the chloride mass balance (CMB) or GCMB methods in other semi-arid regions. The results indicate that the annual recharge rates were not in complete linear proportion to the corresponding annual precipitations, although both exhibited descending tendencies on the whole. Comparisons between the daily precipitation aggregate at different intensity and recharge rates reveal that the occurrence of relatively heavy daily precipitation per year may contribute to such nonlinearity between annual precipitation and recharge. The possible influences of vegetation cover alterations following precipitation change cannot be excluded as well. The approximately negative correlation between the average annual recharge and temperature suggests that changes in temperature have had significant influences on recharge. |
| first_indexed | 2024-04-14T05:12:16Z |
| format | Article |
| id | doaj.art-02cf6bfa575a41e1afd15b630af5ddf2 |
| institution | Directory Open Access Journal |
| issn | 1017-0839 2311-7680 |
| language | English |
| last_indexed | 2024-04-14T05:12:16Z |
| publishDate | 2015-01-01 |
| publisher | Springer |
| record_format | Article |
| series | Terrestrial, Atmospheric and Oceanic Sciences |
| spelling | doaj.art-02cf6bfa575a41e1afd15b630af5ddf22022-12-22T02:10:30ZengSpringerTerrestrial, Atmospheric and Oceanic Sciences1017-08392311-76802015-01-0126445110.3319/TAO.2015.03.18.01(Hy)1303Groundwater Diffuse Recharge and its Response to Climate Changes in Semi-Arid Northwestern ChinaLin DengWenke WangYanjun CaiAnyan Huand Liangcheng TanUnderstanding the processes and rates of groundwater recharge in arid and semi-arid areas is crucial for utilizing and managing groundwater resources sustainably. We obtained three chloride profiles of the unsaturated-zone in the desert/loess transition zone of northwestern China and reconstructed the groundwater recharge variations over the last 11, 21, and 37 years, respectively, using the generalized chloride mass balance (GCMB) method. The average recharge rates were 43.7, 43.5, and 45.1 mm yr-1, respectively, which are similar to those evaluated by the chloride mass balance (CMB) or GCMB methods in other semi-arid regions. The results indicate that the annual recharge rates were not in complete linear proportion to the corresponding annual precipitations, although both exhibited descending tendencies on the whole. Comparisons between the daily precipitation aggregate at different intensity and recharge rates reveal that the occurrence of relatively heavy daily precipitation per year may contribute to such nonlinearity between annual precipitation and recharge. The possible influences of vegetation cover alterations following precipitation change cannot be excluded as well. The approximately negative correlation between the average annual recharge and temperature suggests that changes in temperature have had significant influences on recharge. http://tao.cgu.org.tw/pdf/v264p451.pdf geophysicsgeologyatmospheric sciencespace scienceoceanic sciencehydrology |
| spellingShingle | Lin Deng Wenke Wang Yanjun Cai Anyan Hu and Liangcheng Tan Groundwater Diffuse Recharge and its Response to Climate Changes in Semi-Arid Northwestern China Terrestrial, Atmospheric and Oceanic Sciences geophysics geology atmospheric science space science oceanic science hydrology |
| title | Groundwater Diffuse Recharge and its Response to Climate Changes in Semi-Arid Northwestern China |
| title_full | Groundwater Diffuse Recharge and its Response to Climate Changes in Semi-Arid Northwestern China |
| title_fullStr | Groundwater Diffuse Recharge and its Response to Climate Changes in Semi-Arid Northwestern China |
| title_full_unstemmed | Groundwater Diffuse Recharge and its Response to Climate Changes in Semi-Arid Northwestern China |
| title_short | Groundwater Diffuse Recharge and its Response to Climate Changes in Semi-Arid Northwestern China |
| title_sort | groundwater diffuse recharge and its response to climate changes in semi arid northwestern china |
| topic | geophysics geology atmospheric science space science oceanic science hydrology |
| url |
http://tao.cgu.org.tw/pdf/v264p451.pdf
|
| work_keys_str_mv | AT lindeng groundwaterdiffuserechargeanditsresponsetoclimatechangesinsemiaridnorthwesternchina AT wenkewang groundwaterdiffuserechargeanditsresponsetoclimatechangesinsemiaridnorthwesternchina AT yanjuncai groundwaterdiffuserechargeanditsresponsetoclimatechangesinsemiaridnorthwesternchina AT anyanhu groundwaterdiffuserechargeanditsresponsetoclimatechangesinsemiaridnorthwesternchina AT andliangchengtan groundwaterdiffuserechargeanditsresponsetoclimatechangesinsemiaridnorthwesternchina |