Rice water requirement exacerbates groundwater depletion in Northeast China under a changing climate

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dc.creatorZhao, Yuanbo
dc.creatorLi, Tao
dc.creatorZhao, Jin
dc.creatorZhang, Zhentao
dc.creatorLiu, Runze
dc.creatorShi, Yanying
dc.creatorMa, Haoyu
dc.creatorZhao, Chuang
dc.creatorLiu, Zhijuan
dc.creatorYang, Xiaoguang
dc.date2025-08
dc.date2025-08-04T03:02:04Z
dc.date2025-08-04T03:02:04Z
dc.date.accessioned2026-06-27T04:10:31Z
dc.descriptionIn recent years, Northeast China (NEC) has emerged as a key rice production region. However, the region’s scarce precipitation and surface water availability raise concerns about groundwater over intensive rice cultivation. Using the process-based rice model ORYZA (v3), we assessed irrigation water demand and groundwater depletion under two irrigation regimes - Flood (FLD) Irrigation and Alternative Wet-dry (AWD) Irrigation - across two climate change scenarios (SSP1–2.6 and SSP5–8.5). Results indicated a substantial increase in irrigation water demand (28.6 % to 52.3 %) and groundwater depletion ratio (23.6 % to 53.0 %) under future climate scenarios, with higher impacts under the more extreme SSP5–8.5 pathway. Spatial analysis revealed that regions with larger rice cultivation areas, particularly in Sanjiang Plain, are more vulnerable to groundwater depletion. Furthermore, the benefits of AWD irrigation in mitigating water stress decline under climate change, with reductions in groundwater extraction alleviation (by 7.6 % to 7.9 %) and water use efficiency improvement (by 8.1 % to 8.3 %). These findings underscore the urgent need for spatially optimized rice cultivation and adaptive irrigation strategies tailored to ensure long-term groundwater sustainability and regional food security.
dc.identifierhttps://hdl.handle.net/10568/175943
dc.identifier.urihttp://hdl.handle.net/123456789/23994
dc.languageen
dc.publisherElsevier
dc.rightsLimited Access
dc.sourceZhao, Yuanbo, Tao Li, Jin Zhao, Zhentao Zhang, Runze Liu, Yanying Shi, Haoyu Ma, Chuang Zhao, Zhijuan Liu, and Xiaoguang Yang. "Rice water requirement exacerbates groundwater depletion in Northeast China under a changing climates." Agricultural and Forest Meteorology 371 (2025): 110624.
dc.subjectrice
dc.subjectproduction systems
dc.subjectflood irrigation
dc.subjectgroudwater depletion
dc.subjectclimate change
dc.subjectwater demand
dc.subjectwater resources
dc.subjectagricultural water management
dc.subjectsustainability
dc.subjectfood security
dc.titleRice water requirement exacerbates groundwater depletion in Northeast China under a changing climate
dc.typeJournal Article

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Instituto Internacional de Investigación del Arroz (IRRI)