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首页> 外文会议>25th Conference on Agricultural and Forest Meteorology and 12th Joint Conference on the Applications of Air Pollution Meteorology with Aamp;WMA and Fourth Symposium on the Urban Environment May 20-24, 2002 Norfolk, Virginia >ANOTHER SIMPLE URBAN DISPERSION MODEL
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ANOTHER SIMPLE URBAN DISPERSION MODEL

机译：另一个简单的城市分散模型

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摘要

There is much research underway on flow and dispersion in urban areas. Hanna and Britter (2002) (hereafter denoted by HB) have proposed a straightforward set of formulas for estimating wind flow, turbulence, and dispersion in obstacle arrays. A simple operational model for urban areas is described in this paper and results are given of tests of the model with tracer data from Salt Lake City. Hanna (1971) suggested a simple urban dispersion model. Since that time, many field experiments and model development activities have occurred and it is possible to use this information to develop what we call "another simple urban dispersion model" (ASUDM). The current model is based on the Gaussian plume and puff model and focuses on specification of the wind profile, the friction velocity u~*, the turbulent standard deviations, and the turbulence integral time scales within and above the urban canopy. Alternate models are suggested for plumes released below the urban canopy and above the urban canopy, and smooth transitions are made between the regimes.
机译：目前正在进行有关城市地区流量和分散的研究。 Hanna和Britter（2002）（以下用HB表示）提出了一组简单的公式来估算障碍物阵列中的风流，湍流和散射。本文描述了一个简单的城市地区运营模型，并给出了使用盐湖城的示踪数据对模型进行测试的结果。 Hanna（1971）提出了一个简单的城市分散模型。从那时起，发生了许多现场实验和模型开发活动，可以使用此信息来开发我们所谓的“另一种简单的城市分散模型”（ASUDM）。当前的模型基于高斯羽状和粉扑模型，并着重于风廓线的规范，摩擦速度u〜*，湍流标准偏差以及城市雨棚内外的湍流积分时间尺度。对于城市雨棚下方和城市雨棚上方释放的羽流，建议使用替代模型，并在各个体制之间进行平稳过渡。

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