Soil water movement and deep drainage through thick vadose zones on the northern slope of the Tianshan Mountain: Croplands vs. natural lands
ABSTRACT: Regional aridity is increasing under global climate change, and therefore the sustainable use of water resources has drawn attention from scientists and the public. Land-use changes can have a significant impact on groundwater recharge in arid regions, and quantitative assessment of the im...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2020-03-01
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| Series: | China Geology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2096519220300306 |
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| author | Fang-qiang Sun Li-he Yin Wu-hui Jia Jun Zhang Xiao-yong Wang Li-feng Zhu Xin-xin Zhang Xiao-ping Tang Jia-qiu Dong |
| author_facet | Fang-qiang Sun Li-he Yin Wu-hui Jia Jun Zhang Xiao-yong Wang Li-feng Zhu Xin-xin Zhang Xiao-ping Tang Jia-qiu Dong |
| author_sort | Fang-qiang Sun |
| collection | DOAJ |
| description | ABSTRACT: Regional aridity is increasing under global climate change, and therefore the sustainable use of water resources has drawn attention from scientists and the public. Land-use changes can have a significant impact on groundwater recharge in arid regions, and quantitative assessment of the impact is key to sustainable groundwater resources management. In this study, the changes of groundwater recharge after the conversion of natural lands to croplands were investigated and compared in inland and arid region, i.e., the northern slope of the Tianshan Mountain. Stable isotopes suggest that soil water in topsoil (< 2 m) has experienced stronger evaporation under natural lands than croplands, and then moves downward as a piston flow. Recharge was estimated by the tracer-based mass balance method, i.e., chloride and sulfate. Recharge rates under natural conditions estimated by the chloride mass balance (CMB) method were estimated to be 0.07 mm/a in deserts and 0.4 mm/a in oases. In contrast, the estimated groundwater recharge ranged from 61.2 mm/a to 44.8 mm/a in croplands, indicating that groundwater recharge would increase significantly after land changes from natural lands to irrigated croplands in arid regions. Recharge estimated by the sulfate mass balance method is consistent with that from the CMB method, indicating that sulfate is also a good tracer capable of estimating groundwater recharge. |
| first_indexed | 2024-04-10T16:58:20Z |
| format | Article |
| id | doaj.art-39e170f0a9bc45baaf3b5fd09774fbae |
| institution | Directory Open Access Journal |
| issn | 2096-5192 |
| language | English |
| last_indexed | 2024-04-10T16:58:20Z |
| publishDate | 2020-03-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | China Geology |
| spelling | doaj.art-39e170f0a9bc45baaf3b5fd09774fbae2023-02-07T04:22:10ZengKeAi Communications Co., Ltd.China Geology2096-51922020-03-0131113123Soil water movement and deep drainage through thick vadose zones on the northern slope of the Tianshan Mountain: Croplands vs. natural landsFang-qiang Sun0Li-he Yin1Wu-hui Jia2Jun Zhang3Xiao-yong Wang4Li-feng Zhu5Xin-xin Zhang6Xiao-ping Tang7Jia-qiu Dong8Xi’an Center of Geological Survey, China Geological Survey, Ministry of Natural Resources, Xi’an 710054, ChinaXi’an Center of Geological Survey, China Geological Survey, Ministry of Natural Resources, Xi’an 710054, China; Corresponding author: E-mail address: ylihe@cgs.cn (Li-he Yin).School of Water Resources and Environment, China University of Geosciences, Beijing 100083, ChinaXi’an Center of Geological Survey, China Geological Survey, Ministry of Natural Resources, Xi’an 710054, ChinaXi’an Center of Geological Survey, China Geological Survey, Ministry of Natural Resources, Xi’an 710054, ChinaXi’an Center of Geological Survey, China Geological Survey, Ministry of Natural Resources, Xi’an 710054, ChinaChinese Academy of Geological Sciences, China Geological Survey, Ministry of Natural Resources, Beijing 100037, ChinaXi’an Center of Geological Survey, China Geological Survey, Ministry of Natural Resources, Xi’an 710054, ChinaXi’an Center of Geological Survey, China Geological Survey, Ministry of Natural Resources, Xi’an 710054, ChinaABSTRACT: Regional aridity is increasing under global climate change, and therefore the sustainable use of water resources has drawn attention from scientists and the public. Land-use changes can have a significant impact on groundwater recharge in arid regions, and quantitative assessment of the impact is key to sustainable groundwater resources management. In this study, the changes of groundwater recharge after the conversion of natural lands to croplands were investigated and compared in inland and arid region, i.e., the northern slope of the Tianshan Mountain. Stable isotopes suggest that soil water in topsoil (< 2 m) has experienced stronger evaporation under natural lands than croplands, and then moves downward as a piston flow. Recharge was estimated by the tracer-based mass balance method, i.e., chloride and sulfate. Recharge rates under natural conditions estimated by the chloride mass balance (CMB) method were estimated to be 0.07 mm/a in deserts and 0.4 mm/a in oases. In contrast, the estimated groundwater recharge ranged from 61.2 mm/a to 44.8 mm/a in croplands, indicating that groundwater recharge would increase significantly after land changes from natural lands to irrigated croplands in arid regions. Recharge estimated by the sulfate mass balance method is consistent with that from the CMB method, indicating that sulfate is also a good tracer capable of estimating groundwater recharge.http://www.sciencedirect.com/science/article/pii/S2096519220300306Land-useSoil waterGroundwater rechargeDeep drainageUnsaturated zoneArid regions |
| spellingShingle | Fang-qiang Sun Li-he Yin Wu-hui Jia Jun Zhang Xiao-yong Wang Li-feng Zhu Xin-xin Zhang Xiao-ping Tang Jia-qiu Dong Soil water movement and deep drainage through thick vadose zones on the northern slope of the Tianshan Mountain: Croplands vs. natural lands China Geology Land-use Soil water Groundwater recharge Deep drainage Unsaturated zone Arid regions |
| title | Soil water movement and deep drainage through thick vadose zones on the northern slope of the Tianshan Mountain: Croplands vs. natural lands |
| title_full | Soil water movement and deep drainage through thick vadose zones on the northern slope of the Tianshan Mountain: Croplands vs. natural lands |
| title_fullStr | Soil water movement and deep drainage through thick vadose zones on the northern slope of the Tianshan Mountain: Croplands vs. natural lands |
| title_full_unstemmed | Soil water movement and deep drainage through thick vadose zones on the northern slope of the Tianshan Mountain: Croplands vs. natural lands |
| title_short | Soil water movement and deep drainage through thick vadose zones on the northern slope of the Tianshan Mountain: Croplands vs. natural lands |
| title_sort | soil water movement and deep drainage through thick vadose zones on the northern slope of the tianshan mountain croplands vs natural lands |
| topic | Land-use Soil water Groundwater recharge Deep drainage Unsaturated zone Arid regions |
| url | http://www.sciencedirect.com/science/article/pii/S2096519220300306 |
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