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<p>This study examines the evolving impacts of rapid land-use changes on short-duration rainstorms and urban waterlogging through a case study in Zhengzhou City, China. The research provides a comprehensive analysis of urban land-use change characteristics. Rainfall simulations were conducted using the WRF model by adjusting land-use parameters. Subsequently, the InfoWorks ICM model was employed to simulate scenarios of rainstorm-induced waterlogging using the same set of land-use parameters. The findings indicate that: (1) From 2000 to 2020, the primary trend in land use changes in Zhengzhou City was the transformation of farmland into impervious surfaces, with an average increase of approximately 160 km<sup>2</sup> per decade. This change followed a diffusion pattern, extending from the central area towards the periphery. During the same period, the extent of water bodies, forests, grasslands, and bare land all declined sequentially, with water bodies experiencing the greatest reduction, followed by forests, grasslands, and finally bare land. (2) The impact of land use change on rainfall can be observed in four key aspects: accumulated rainfall, rainfall process, spatial distribution of cumulative rainfall, and rainfall amounts at storm centers. Regardless of whether the rainfall return period (RP) is 3, 5, or 10&#xa0;years, cumulative rainfall generally exhibits an increasing trend. Specifically, for 3-year and 5-year RPs, cumulative rainfall increased by approximately 12&#xa0;mm from 2000 to 2010, while the increase for the 10-year RP was only 3.28&#xa0;mm. However, the simulated rainfall in 2020 for all three RPs was lower compared to the observed rainfall in 2015. The impact on the rainfall process was relatively insignificant. When compared to heavy rainfall events with a 10-year RP, land use changes had a more pronounced effect on the rainfall intensity at the storm center for events with shorter RPs. (3) Land use has a considerable impact on urban waterlogging, particularly regarding the number of waterlogging points, pipe overloads, and inundation conditions. Changes in accumulated rainfall have a more significant effect on rainfall events with 3-year and 5-year RPs. However, for events with a 10-year RP, the influence of land use change is more pronounced. For a rainfall event with a 3-year RP, the number of waterlogging points in the M2 scenario increased by 169 compared to the M1 scenario, which was notably higher than the change observed in the M3 scenario relative to M1. A similar pattern is seen for rainfall events with a 5-year RP. In contrast, for a rainfall event with a 10-year RP, the number of waterlogging points in the M2 scenario decreased by 5 relative to the M1 scenario, while the M3 scenario showed a dramatic increase of 180 compared to M1.</p>

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Influence of land use change on rainfall and waterlogging in Zhengzhou city

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月27日

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  • Jinping Zhang,
  • Zhiwei Li,
  • Xuechun Li,
  • Lixin Zhang

摘要

This study examines the evolving impacts of rapid land-use changes on short-duration rainstorms and urban waterlogging through a case study in Zhengzhou City, China. The research provides a comprehensive analysis of urban land-use change characteristics. Rainfall simulations were conducted using the WRF model by adjusting land-use parameters. Subsequently, the InfoWorks ICM model was employed to simulate scenarios of rainstorm-induced waterlogging using the same set of land-use parameters. The findings indicate that: (1) From 2000 to 2020, the primary trend in land use changes in Zhengzhou City was the transformation of farmland into impervious surfaces, with an average increase of approximately 160 km2 per decade. This change followed a diffusion pattern, extending from the central area towards the periphery. During the same period, the extent of water bodies, forests, grasslands, and bare land all declined sequentially, with water bodies experiencing the greatest reduction, followed by forests, grasslands, and finally bare land. (2) The impact of land use change on rainfall can be observed in four key aspects: accumulated rainfall, rainfall process, spatial distribution of cumulative rainfall, and rainfall amounts at storm centers. Regardless of whether the rainfall return period (RP) is 3, 5, or 10 years, cumulative rainfall generally exhibits an increasing trend. Specifically, for 3-year and 5-year RPs, cumulative rainfall increased by approximately 12 mm from 2000 to 2010, while the increase for the 10-year RP was only 3.28 mm. However, the simulated rainfall in 2020 for all three RPs was lower compared to the observed rainfall in 2015. The impact on the rainfall process was relatively insignificant. When compared to heavy rainfall events with a 10-year RP, land use changes had a more pronounced effect on the rainfall intensity at the storm center for events with shorter RPs. (3) Land use has a considerable impact on urban waterlogging, particularly regarding the number of waterlogging points, pipe overloads, and inundation conditions. Changes in accumulated rainfall have a more significant effect on rainfall events with 3-year and 5-year RPs. However, for events with a 10-year RP, the influence of land use change is more pronounced. For a rainfall event with a 3-year RP, the number of waterlogging points in the M2 scenario increased by 169 compared to the M1 scenario, which was notably higher than the change observed in the M3 scenario relative to M1. A similar pattern is seen for rainfall events with a 5-year RP. In contrast, for a rainfall event with a 10-year RP, the number of waterlogging points in the M2 scenario decreased by 5 relative to the M1 scenario, while the M3 scenario showed a dramatic increase of 180 compared to M1.