LIU Yixin, LI Yongkun, ZHANG Li, et al. Urban watershed runoff evolution and the response under changing environment. [J]. Journal of Northwest University (Natural Science Edition) 54(3):345-354(2024)
DOI:
LIU Yixin, LI Yongkun, ZHANG Li, et al. Urban watershed runoff evolution and the response under changing environment. [J]. Journal of Northwest University (Natural Science Edition) 54(3):345-354(2024) DOI: 10.16152/j.cnki.xdxbzr.2024-03-001.
Urban watershed runoff evolution and the response under changing environment
流域径流是变化环境的重要响应要素,在气候变化和人类活动的影响下,流域径流量已经发生了深刻变化,研究其演变及响应特征有助于提高人类对变化环境的应对能力。以北运河北京市域主要集水区为研究区,通过分析水文气象观测站近40年水文数据,分析北运河流域降水径流变化趋势,提取洪水场次;引入全球气候模式数据,利用降尺度模型进行降尺度处理,与水文模型结合对流域径流进行了预报分析。结果表明:流域历史降水趋势性变化不明显,径流量呈增大趋势;未来北运河流域(通县站)水资源的变化在气候变化影响下较为明显,随着温度升高、降水增加,流量增大,预测流量在21世纪中期达到新高,为385.1 m
Basin runoff is an important response factor to changing environment. Under the influence of climate change and human activities
watershed runoff has undergone profound changes. Studying its evolution and response characteristics is helpful to improve human’s ability to cope with changing environment. Taking the main catchment area of the Beijing municipal area of the North Canal as the study area
the variation trend of rainfall and runoff in the North Canal basin was analyzed by analyzing the hydrological data of hydrometeorological observation stations in the past 40 years
and the flood field was extracted. The global clim
ate model data is introduced
the downscaling model is used for downscaling
and the runoff forecast is analyzed in combination with the hydrological model. The results show that the historical precipitation trend of the basin is not obvious
and the runoff is increasing. In the future
the change of water resources in the North Canal Basin (Tongxian Station) will be more obvious under the influence of climate change. With the increase of temperature and precipitation
the runoff will increase
and the discharge is predicted to reach a new high of 385.1m
3
/s in the middle of this century.With the continuous increase of radiative forcing
the degree of hydrological response increases correspondingly
and most of the peak runoff in the North Canal basin occurs in the late 2050 and 2090 periods. The research can provide some reference for the future water resource utilization
flood containment and disaster reduction measures and the realization path of dual carbon targets in urban watershed.
关键词
气候变化流域径流径流预报双碳目标
Keywords
climate changewatershed runoffrunoff forecastcarbon peaking and carbon neutrality goals
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