Sensitivity analysis of building material, ground material, and tree parameters in microclimate simulations

IF 6 2区工程技术 Q1 ENVIRONMENTAL SCIENCES

Urban Climate Pub Date : 2024-10-29 DOI:10.1016/j.uclim.2024.102184

Anh-Vu Le, Oi-Man Hip, Shun-Yu Yang, Ying-Chieh Chan

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引用次数: 0

Abstract

Understanding urban microclimates is crucial amid rapid urbanization and climate change. Studying these microclimates through computational fluid dynamics (CFD) simulations allows researchers to analyze various urban design scenarios. However, setting up building, ground material, and tree parameters in simulations is essential yet challenging. This study investigates the impact of these three parameter categories using sensitivity analysis to understand their influence on microclimate simulation outputs.

We validated ENVI-met's simulation results by comparing them with monitoring data from two sites in Taipei City and analyzed the sensitivity results using box plots with pair-wise comparisons. The findings show that wall reflectivity, ground albedo, leaf area density, and soil moisture significantly impact air and mean radiant temperatures. Soil moisture has the most pronounced effect on air temperature, while reflectivity and albedo significantly affect mean radiant temperature. Additionally, the interactions between parameters require more attention as they complexly affect the simulation outputs.

Addressing these factors can enhance the accuracy of microclimate simulations, leading to better-informed urban design decisions. This study highlights these critical factors and provides insights for improving urban microclimate simulations.

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小气候模拟中建筑材料、地面材料和树木参数的敏感性分析

在快速城市化和气候变化的背景下，了解城市微气候至关重要。通过计算流体动力学（CFD）模拟研究这些微气候，研究人员可以分析各种城市设计方案。然而，在模拟中设置建筑、地面材料和树木参数至关重要，但也极具挑战性。我们将 ENVI-met 的模拟结果与台北市两个地点的监测数据进行比较，验证了 ENVI-met 的模拟结果，并使用箱形图和成对比较分析了敏感性结果。结果表明，墙面反射率、地面反照率、叶面积密度和土壤湿度对空气温度和平均辐射温度有显著影响。土壤湿度对空气温度的影响最为明显，而反射率和反照率则对平均辐射温度有显著影响。此外，参数之间的相互作用也需要更多关注，因为它们会对模拟输出产生复杂的影响。解决这些因素可以提高小气候模拟的准确性，从而做出更明智的城市设计决策。本研究强调了这些关键因素，并为改进城市微气候模拟提供了启示。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Urban Climate Social Sciences-Urban Studies

CiteScore

9.70

自引率

9.40%

发文量

286

期刊介绍： Urban Climate serves the scientific and decision making communities with the publication of research on theory, science and applications relevant to understanding urban climatic conditions and change in relation to their geography and to demographic, socioeconomic, institutional, technological and environmental dynamics and global change. Targeted towards both disciplinary and interdisciplinary audiences, this journal publishes original research papers, comprehensive review articles, book reviews, and short communications on topics including, but not limited to, the following: Urban meteorology and climate[...] Urban environmental pollution[...] Adaptation to global change[...] Urban economic and social issues[...] Research Approaches[...]