城市化对河南省极端降水空间分布的影响
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TV122

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国家自然科学基金(51739011,51979285);流域水循环模拟与调控国家重点实验室自由探索项目(SKL2022TS11);国家重点研发计划(2018YFC1508203)


Influence of urbanization on spatial distribution of extreme precipitation in Henan Province
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    摘要:

    针对城市化对极端降水空间分布的影响问题,利用城市冠层模型结合WRF(weather research and forecasting)中尺度天气预报模式对河南省2021年“7·20”特大暴雨进行数值模拟,并结合国家级地面观测站实测降水数据对该模型的模拟精度进行了验证。结果表明,考虑城市冠层影响的耦合模型能更好地模拟出区域极端降水的强度和落区,与实测降水的空间分布更为接近,耦合模拟得到的平均降水量比未考虑城市冠层影响的模拟结果高12.1 mm;人工耗水改变了区域的水热耦合平衡,促进了城市区域对流性降水的形成。

    Abstract:

    Aiming at the influence of urbanization on the spatial distribution of extreme precipitation, the urban canopy model combined with WRF(weather research and forecasting)mesoscale weather forecast model was used to simulate the “7·20” torrential rain in Henan Province in 2021. Combined with the measured precipitation data of national ground observation stations, the simulation accuracy of the model was verified. The results show that the coupling model considering the influence of urban canopy can better simulate the intensity and falling area of regional extreme precipitation, which is closer to the spatial distribution of measured precipitation. The average precipitation obtained by the coupling simulation is 12. 1 mm higher than that without considering the influence of urban canopy. Artificial water consumption changes the regional water heat coupling balance and promotes the formation of convective precipitation in urban areas.

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刘家宏,骆卓然,张永祥,等.城市化对河南省极端降水空间分布的影响[J].水资源保护,2022,38(1):100-105.(LIU Jiahong, LUO Zhuoran, ZHANG Yongxiang, et al. Influence of urbanization on spatial distribution of extreme precipitation in Henan Province[J]. Water Resources Protection,2022,38(1):100-105.(in Chinese))

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  • 收稿日期:2021-09-03
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  • 在线发布日期: 2022-01-20
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