Diminished water yield coefficient of glacial catchments in Northwest China
Study region: 19 glacial catchments located in Northwest China. Study focus: The water yield coefficient (denoted as WYc) of glacier catchments in Northwest China has changed over the past six decades, closely linked to shifts in land cover dynamics. However, quantifying the impacts of climate and l...
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Elsevier
2025-02-01
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| Series: | Journal of Hydrology: Regional Studies |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214581824004415 |
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| author | Jing Liu Aihua Long Mingjiang Deng Qiang An Xiaoya Deng Zhenliang Yin Pei Zhang Xiaoying Lai Xinchen Gu |
| author_facet | Jing Liu Aihua Long Mingjiang Deng Qiang An Xiaoya Deng Zhenliang Yin Pei Zhang Xiaoying Lai Xinchen Gu |
| author_sort | Jing Liu |
| collection | DOAJ |
| description | Study region: 19 glacial catchments located in Northwest China. Study focus: The water yield coefficient (denoted as WYc) of glacier catchments in Northwest China has changed over the past six decades, closely linked to shifts in land cover dynamics. However, quantifying the impacts of climate and land cover changes on glacier catchments remains challenging due to the complexity of glacier hydrological processes and the scarcity of long-term glacier runoff data. In this study, the Budyko equation was coupled with a glacier runoff model to enable quantitative analysis of the factors driving changes in water yield (WY). Path analysis was then employed to assess the direct and indirect effects of climate and landscape changes on the WYc. New hydrological insight for the region: The results indicated that 14 out of 19 catchments experienced a decline in WYc, particularly in those with greater glacier coverage. Glacier retreat and increased vegetation greenness adversely affected WYc by increasing the catchment parameter, with effects of −26.42 % and −25.21 %, respectively. Although overall WY in the catchments has increased—driven primarily by increased precipitation and glacier storage loss, with contribution rates of 100.66 % and 25.05 %, respectively—the diminished WYc is expected to decelerate the rate of WY increase. This trend poses significant challenges for water resource management in arid and water-scarce regions. |
| format | Article |
| id | doaj-art-ef56a1e288af4966ab15bb3cba62e4d3 |
| institution | Kabale University |
| issn | 2214-5818 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Hydrology: Regional Studies |
| spelling | doaj-art-ef56a1e288af4966ab15bb3cba62e4d32025-01-22T05:41:59ZengElsevierJournal of Hydrology: Regional Studies2214-58182025-02-0157102092Diminished water yield coefficient of glacial catchments in Northwest ChinaJing Liu0Aihua Long1Mingjiang Deng2Qiang An3Xiaoya Deng4Zhenliang Yin5Pei Zhang6Xiaoying Lai7Xinchen Gu8School of Civil Engineering, Tianjin University, Tianjin 300072, ChinaCollege of Management and Economics, Tianjin University, Tianjin 300072, China; Correspondence to: College of Management and Economics, Tianjin University, 92# Weijin Road, Tianjin 300072, China.School of Civil Engineering, Tianjin University, Tianjin 300072, ChinaCollege of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, ChinaChina Institute of Water Resources and Hydropower Research, Beijing 100038, ChinaKey Laboratory of Ecohydrology of Inland River Basin, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, ChinaChina Institute of Water Resources and Hydropower Research, Beijing 100038, ChinaCollege of Management and Economics, Tianjin University, Tianjin 300072, ChinaSchool of Civil Engineering, Tianjin University, Tianjin 300072, ChinaStudy region: 19 glacial catchments located in Northwest China. Study focus: The water yield coefficient (denoted as WYc) of glacier catchments in Northwest China has changed over the past six decades, closely linked to shifts in land cover dynamics. However, quantifying the impacts of climate and land cover changes on glacier catchments remains challenging due to the complexity of glacier hydrological processes and the scarcity of long-term glacier runoff data. In this study, the Budyko equation was coupled with a glacier runoff model to enable quantitative analysis of the factors driving changes in water yield (WY). Path analysis was then employed to assess the direct and indirect effects of climate and landscape changes on the WYc. New hydrological insight for the region: The results indicated that 14 out of 19 catchments experienced a decline in WYc, particularly in those with greater glacier coverage. Glacier retreat and increased vegetation greenness adversely affected WYc by increasing the catchment parameter, with effects of −26.42 % and −25.21 %, respectively. Although overall WY in the catchments has increased—driven primarily by increased precipitation and glacier storage loss, with contribution rates of 100.66 % and 25.05 %, respectively—the diminished WYc is expected to decelerate the rate of WY increase. This trend poses significant challenges for water resource management in arid and water-scarce regions.http://www.sciencedirect.com/science/article/pii/S2214581824004415GlacierWater yield coefficientClimate changeLandscape changeExtended Budyko equationPath analysis |
| spellingShingle | Jing Liu Aihua Long Mingjiang Deng Qiang An Xiaoya Deng Zhenliang Yin Pei Zhang Xiaoying Lai Xinchen Gu Diminished water yield coefficient of glacial catchments in Northwest China Journal of Hydrology: Regional Studies Glacier Water yield coefficient Climate change Landscape change Extended Budyko equation Path analysis |
| title | Diminished water yield coefficient of glacial catchments in Northwest China |
| title_full | Diminished water yield coefficient of glacial catchments in Northwest China |
| title_fullStr | Diminished water yield coefficient of glacial catchments in Northwest China |
| title_full_unstemmed | Diminished water yield coefficient of glacial catchments in Northwest China |
| title_short | Diminished water yield coefficient of glacial catchments in Northwest China |
| title_sort | diminished water yield coefficient of glacial catchments in northwest china |
| topic | Glacier Water yield coefficient Climate change Landscape change Extended Budyko equation Path analysis |
| url | http://www.sciencedirect.com/science/article/pii/S2214581824004415 |
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