Impacts of Urbanization on Extreme Regional Precipitation Events

Wu, Wenbin; Ren, Lei; Wei, Yuying; Guo, Mengjing

doi:10.1155/2021/2210184

Cited by 5 publications

(2 citation statements)

References 21 publications

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“…The impact of urbanization on weather patterns and energy balance has attracted heightened attention due to its farreaching implications for public health, urban planning, and climate change. In the specific context of the Lake Victoria basin (LVB), an area marked by rapid urban expansion and susceptibility to intense rainfall events, it is of the utmost importance to understand the influence of an urban canopy on meteorological parameters [15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Assessing the Effects of Urban Canopy on Extreme Rainfall over the Lake Victoria Basin in East Africa Using the WRF Model

Birungi,

Yu,

Chaibou

et al. 2024

Atmosphere

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The model simulation focuses on an extreme rainfall event that triggered a flood hazard in the Lake Victoria basin region of East Africa from June 24th to 26th, 2022. This study investigates the impacts of its urban canopy on the extreme rainfall events over the Lake Victoria basin in East Africa, employing the Weather Research and Forecasting (WRF) model at a convective-permitting resolution. The rapid urbanization of the region has given rise to an urban canopy, which has notable effects on local weather patterns, including the intensity and distribution of rainfall. The model incorporates high-resolution land use and urban canopy parameters to accurately capture the influences of urbanization on local weather patterns. This research comprises three sets of experiments, two with urban areas and one without, using the WRF model; the experiments focus on three days of an extreme rainfall event in the Lake Victoria basin. Satellite-based precipitation products and reanalysis datasets are employed for a synoptic analysis and model evaluation. The results demonstrate the model’s effectiveness in capturing meteorological variables during an extreme event compared to observed data. The synoptic patterns reveal that, during the extreme event, the Mascarene and St. Helena influenced rainfall conditions over the Lake Victoria Basin by directing moist air toward the northwest. This led to increased moisture convergence from the urban–rural interface toward urban areas, enhancing convection and processes that result in extreme rainfall. Moreover, this study indicates that the urban canopy, specifically the building effect parameterization, significantly amplifies the intensity and duration of rainfall in the urban areas of the region. This research also indicates a general increase in air temperature, relative humidity, latent heat flux, and surface sensible heat flux due to the urban canopy. These findings highlight the substantial influence of urbanization on rainfall patterns in the urban environment.

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Section: Introductionmentioning

confidence: 99%

Assessing the Effects of Urban Canopy on Extreme Rainfall over the Lake Victoria Basin in East Africa Using the WRF Model

Birungi,

Yu,

Chaibou

et al. 2024

Atmosphere

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“…The accelerated rise of PMP from 1977-2011 should be highlighted, which results from the joint contribution of the increase in 𝑋 #$ and K factor (Figure5c). It can be the result of the intensification of both climate variability (e.g., El Niño-Southern Oscillation events)(Huang and Stevenson, 2023) and anthropogenic forcings (e.g., irrigation and urbanization)(Wu et al, 2021;Han et al, 2022). Overall, the national average PMP increased from 106.5 to 109.5 mm/d between the period 1961-1995 to 1980-2014, equivalent to a 3% increase with baseline from the first period.…”

mentioning

confidence: 99%

Variation and attribution of probable maximum precipitation of China using high-resolution dataset in a changing climate

Xiong,

Guo,

Yin

et al. 2023

Preprint

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Abstract. Accurate assessment of the probable maximum precipitation (PMP) is crucial in assessing the resilience of high-risk water infrastructures, water resource management, and hydrological hazard mitigation. Conventionally, PMP is estimated based on a static climate assumption and is constrained by the insufficient spatial resolution of ground observations, thus neglecting the spatial heterogeneity and temporal variability of climate systems. Such assumptions are critical, especially for China, which is highly vulnerable to global warming in the premise of existing ~100,000 reservoirs. Here, we use the finest spatiotemporal resolution (1d & 1 km) precipitation dataset to present the spatial distribution of 1d PMP based on the improved Hershfield method. Current reservoir design values, a quasi-global satellite-based PMP database, and in-situ precipitation are used to benchmark against our results. The 35-year running trend from 1961–1995 to 1980–2014 is quantified and partitioned, followed by future projections using the Coupled Model Inter-comparison Project Phase 6 simulations under two scenarios. We find the national PMP generally decreases from Southeast to Northwest and is typically dominated by the high variability of precipitation extremes in North China and high intensity in South China. Though consistent with previous project design values, our PMP calculations present underestimations by comparing with satellite and in-situ results due to differences in spatial scales and computation methods. Inter-annual variability, instead of the intensification of precipitation extremes, dominates the PMP running trends on a national scale. Climate change, mainly attributed to land-atmosphere coupling effects, leads to the widespread increase (>20 %) of PMP across the country under the SSP126 scenario, which is projected to be higher along with the intensification of CO2 emission. Our observation- and modeling-based results can provide valuable implications for water managers under a changing climate.

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The relationship between population growth and precipitation change in some regions across Vietnam: implications for urbanization effect

Pham,

Tran,

Nguyen

et al. 2024

Environ Sci Pollut Res

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Impacts of Urbanization on Extreme Regional Precipitation Events

Cited by 5 publications

References 21 publications

Assessing the Effects of Urban Canopy on Extreme Rainfall over the Lake Victoria Basin in East Africa Using the WRF Model

Assessing the Effects of Urban Canopy on Extreme Rainfall over the Lake Victoria Basin in East Africa Using the WRF Model

Variation and attribution of probable maximum precipitation of China using high-resolution dataset in a changing climate

The relationship between population growth and precipitation change in some regions across Vietnam: implications for urbanization effect

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