Anthropogenic effects on the subsurface thermal and groundwater environments in Osaka, Japan and Bangkok, Thailand.
Anthropogenic effects on the subsurface thermal and groundwater environments in Osaka, Japan and Bangkok, Thailand.
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DOI：
10.1016/j.scitotenv.2008.06.064
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发表时间：
2009-04
期刊：
影响因子：
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通讯作者：
M. Taniguchi;J. Shimada;Y. Fukuda;M. Yamano;S. Onodera;S. Kaneko;Akihisa Yoshikoshi
中科院分区：
文献类型：
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作者：
M. Taniguchi;J. Shimada;Y. Fukuda;M. Yamano;S. Onodera;S. Kaneko;Akihisa Yoshikoshi
对大阪和曼谷的人为影响进行了评估，以比较两个城市的地下环境与发展阶段之间的关系。两个城市都发现了由于热岛效应导致的地下热异常。地表变暖指数（SWI），即偏离稳定地温梯度的深度，被用作热岛效应的指标。 SWI 随着热岛效应的强度和从地表变暖开始经过的时间而增加（更深）。热岛效应引起的地下热异常分布与同一过程引起的气温变化分布非常吻合，大阪和曼谷的人口密度分布描述了这一点。发现两个城市地下水下降和沉降之间存在不同的时间滞后。这是由于孔隙度和导水率等水文地质特征的差异造成的。我们发现大阪和曼谷地下退化的差异，包括地下热异常、地下水下降和地面沉降，取决于城市化发展阶段和水文地质特征的差异。
Anthropogenic effects in both Osaka and Bangkok were evaluated to compare the relationships between subsurface environment and the development stage of both cities. Subsurface thermal anomalies due to heat island effects were found in both cities. The Surface Warming Index (SWI), the departure depth from the steady geothermal gradient, was used as an indicator of the heat island effect. SWI increases (deeper) with the magnitude of heat island effect and the elapsed time starting from the surface warming. Distributions of subsurface thermal anomalies due to the heat island effect agreed well with the distribution of changes in air temperature due to the same process, which is described by the distribution of population density in both Osaka and Bangkok. Different time lags between groundwater depression and subsidence in the two cities was found. This is attributed to differences in hydrogeologic characters, such as porosity and hydraulic conductivity. We find that differences in subsurface degradations in Osaka and Bangkok, including subsurface thermal anomalies, groundwater depression, and land subsidence, depends on the difference of the development stage of urbanization and hydrogeological characters.