边际土地生物质作物：增加降水量并缓解极端降水事件（英文）

卢春燕; 何雨峰; 王遂缠; 李周园

doi:10.13928/j.cnki.wrahe.2026.04.005

水利水电技术（中英文） ›› 2026, Vol. 57 ›› Issue (4) : 58 -80. DOI: 10.13928/j.cnki.wrahe.2026.04.005

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边际土地生物质作物：增加降水量并缓解极端降水事件（英文）

卢春燕 ¹ ,
何雨峰 ² ,
王遂缠 ¹ ,
李周园 ³

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Biomass crops on marginal lands: Increasing precipitation and mitigating extreme precipitation events

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摘要

【目的】随着能源需求增长及对气候变化的关注，合理利用边际土地种植生物质能源作物成为近年研究的热点。以往研究表明边际土地种植多年生作物对区域气候变化和粮食生产影响显著，但均未全面考虑植物生长与气候变化的“相互”反馈，使结果可靠性略显不足。为克服早期研究的不足，【方法】基于耦合模型CWRF-BioCro综合考虑以上两者之间的“相互”反馈，分析在美国边际土地种植多年生生物质作物和维持现有植被覆盖两种情景下区域内降水格局的变化及其物理机制。【结果】结果表明，在边际土地种植多年生生物质作物后：区域合计平均日降水量增加6.33 mm/day(0.01%),以上增加主要发生在中西部春、夏、秋季和东部秋冬季，区域内水汽输送和潜热通量的显著增强是其主要原因；区域最大日降水量减少2.1 mm(4.39%),该减少主要集中于中东部，源于中东部感热通量的显著减少；同时中东部地区平均日降水量大于50 mm/d的降水事件频率降低，其中达50.0~99.9 mm/day的减少更胜、为31 d(0.24%)。【结论】综上，边际土地种植多年生生物质作物能增加区域降水量，同时减少极端降水。强调了生物物理反馈机制在调节区域气候中的关键作用，并为制定适应气候变化的土地管理策略提供了科学依据。

Abstract

[Objective] With increasing energy demand and growing concerns about climate change, the rational utilization of marginal lands for cultivating biomass energy crops has emerged as a research focus in recent years. Previous studies have demonstrated that cultivating perennial biomass crops on marginal lands significantly impacts regional climate change and food production. However, these investigations did not fully consider the interactive feedback between plant growth and climate change, leading to slightly insufficient reliability of the result. [Methods] To address the limitations of earlier studies, the coupled model CWRF-Bio Cro was employed to comprehensively consider the interactive feedback between plant growth and climate change, and to analyze changes in regional precipitation patterns and their physical mechanisms under two scenarios in the United States: cultivation of perennial biomass crops on marginal lands and maintenance of existing vegetation cover. [Results] The result showed that after cultivating perennial biomass crops on marginal lands, the regional total average daily precipitation increased by 6. 33 mm/day(0. 01%), with most of the increase occurring during spring, summer, and autumn in the central and western regions and during autumn and winter in the eastern region. This was primarily due to the significant enhancement of water vapor transport and latent heat flux in the region. The regional maximum daily precipitation decreased by 2. 1 mm(4. 39%), mainly in the central and eastern regions, Resulting from a significant decrease in sensible heat flux in these regions. Meanwhile, the frequency of precipitation events with an average daily precipitation greater than 50 mm/d decreased in the central and eastern regions, with the most pronounced reduction of 31 days(0. 24%) observed in events in the range of 50. 0 ~ 99. 9 mm/day. [Conclusion] In summary, planting perennial biomass crops on marginal lands can increase regional precipitation and reduce extreme precipitation. These findings highlight the critical role of biophysical feedback mechanisms in regulating regional climate and provide a scientific foundation for developing climate-adaptive land management strategies.