Effects of irrigation and canal networks on groundwater–land surface interactions in the middle Heihe River Basin, China
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| Názov: | Effects of irrigation and canal networks on groundwater–land surface interactions in the middle Heihe River Basin, China |
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| Autori: | Zheng Lu, Shuyan Peng, Tingting Wu, Jiaxin Lei, Jiaxing Wei, Xiaofan Yang |
| Zdroj: | Journal of Hydrology: Regional Studies, Vol 60, Iss , Pp 102532- (2025) |
| Informácie o vydavateľovi: | Elsevier, 2025. |
| Rok vydania: | 2025 |
| Zbierka: | LCC:Physical geography LCC:Geology |
| Predmety: | Irrigation, Water cycle, Water resources management, Integrated hydrologic modeling, Groundwater–land surface interactions, Physical geography, GB3-5030, Geology, QE1-996.5 |
| Popis: | Study region: Heihe River Basin, a typical endorheic river basin in northwest China. Study focus: Agriculture is the highest water-consuming sector, utilizing approximately 70 % of available water resources, predominantly for irrigation purposes. However, limited studies have explicitly diagnosed the role of agriculture managements (such as irrigation and canal networks) on the water–energy cycles of the agriculture system. This study presents a suite of numerical experiments to analyze the effects of irrigation and canal networks on groundwater–land surface interactions using a 3D, fully integrated hydrologic model. The model has been validated against both observations and spatially distributed products, confirming its reliability in simulating regional hydrologic dynamics. New hydrologic insight for the region: The findings reveal that irrigation expanded the shallow water table depths (WTD) zone by 30 % and increased summer and fall streamflow by approximately 10 %. Additionally, irrigation substantially reduced soil temperature at WTD of 0.01–10 m (i.e., cooling effect), altering the strong correlations between water table depth and latent heat flux. Moreover, irrigation canals heightened streamflow peaks, and increased spatial variability in surface heat flux differences, particularly in sensible heat flux, even causing localized reversals. This study provides scientific evidence in understanding the role of agriculture activities in local water resources management. |
| Druh dokumentu: | article |
| Popis súboru: | electronic resource |
| Jazyk: | English |
| ISSN: | 2214-5818 |
| Relation: | http://www.sciencedirect.com/science/article/pii/S221458182500357X; https://doaj.org/toc/2214-5818 |
| DOI: | 10.1016/j.ejrh.2025.102532 |
| Prístupová URL adresa: | https://doaj.org/article/85a68e624f2a4c1dab0992c8a14a7062 |
| Prístupové číslo: | edsdoj.85a68e624f2a4c1dab0992c8a14a7062 |
| Databáza: | Directory of Open Access Journals |
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Nájsť tento článok vo Web of Science | Abstrakt: | Study region: Heihe River Basin, a typical endorheic river basin in northwest China. Study focus: Agriculture is the highest water-consuming sector, utilizing approximately 70 % of available water resources, predominantly for irrigation purposes. However, limited studies have explicitly diagnosed the role of agriculture managements (such as irrigation and canal networks) on the water–energy cycles of the agriculture system. This study presents a suite of numerical experiments to analyze the effects of irrigation and canal networks on groundwater–land surface interactions using a 3D, fully integrated hydrologic model. The model has been validated against both observations and spatially distributed products, confirming its reliability in simulating regional hydrologic dynamics. New hydrologic insight for the region: The findings reveal that irrigation expanded the shallow water table depths (WTD) zone by 30 % and increased summer and fall streamflow by approximately 10 %. Additionally, irrigation substantially reduced soil temperature at WTD of 0.01–10 m (i.e., cooling effect), altering the strong correlations between water table depth and latent heat flux. Moreover, irrigation canals heightened streamflow peaks, and increased spatial variability in surface heat flux differences, particularly in sensible heat flux, even causing localized reversals. This study provides scientific evidence in understanding the role of agriculture activities in local water resources management. |
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| ISSN: | 22145818 |
| DOI: | 10.1016/j.ejrh.2025.102532 |