Airflow and air quality simulations over the western mountainous region with a four-dimensional data assimilation technique

Yamada, Tetsuji; Kao, Chih-Yue Jim; Bunker, S.

doi:10.1016/0004-6981(89)90003-6

Cited by 18 publications

(12 citation statements)

References 16 publications

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“…RAPTAD is a three-dimensional Lagrangian puff model which is based on a random displacement method that the mean and turbulence components of winds are provided by HOTMAC. Successful simulations of concentration distributions would be depending greatly on the accuracy of wind directions, wind speeds, and atmospheric turbulence used in pollutant transport and diffusion models (Yamada et al, 1989;Yamada, 1999).…”

Section: Air Dispersion Modelingmentioning

confidence: 99%

Estimation of air pollution from the OGVs and its dispersion in a coastal area

Pokhrel

Lee

2015

Ocean Engineering

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Section: Air Dispersion Modelingmentioning

confidence: 99%

Estimation of air pollution from the OGVs and its dispersion in a coastal area

Pokhrel

Lee

2015

Ocean Engineering

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“…The boundary and initial conditions used in this study are similar to those used in Yamada [15] and Yamada et al [18]. To increase the accuracy of finite-difference approximations, the partial differential Eqs.…”

Section: Hydrodynamic Modelmentioning

confidence: 98%

“…To simulate the spread of a vapor cloud released from a source, a simple random-particle diffusion model, which is similar to that used by Yamada et al [18], is employed as follows:…”

Section: Random-particle Diffusion Modelmentioning

confidence: 99%

“…A kernel density estimator described in Yamada et al [18] was used in this study where each particle is represented by the center of a puff: a Gaussian distribution Fig. 5 The simulated wind fields of four seasons in Kaohsiung City (1995) with variances determined by the time integration of the velocity variances encountered during the history of the puff.…”

Section: Random-particle Diffusion Modelmentioning

confidence: 99%

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Environmental Exposure Assessment for Emergency Response in a Nuclear Power Plant Using an Integrated Source Term and 3D Numerical Model

Tseng¹,

Chang

2008

Environ Model Assess

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Nuclear power plants are normally assumed to be safe when their radiation impact in all operational states is kept at a reasonably low level. However, accidentally released radioactive substances and ionizing radiation may lead to a situation that cannot maintain the regulatory prescribed dose limits for internal and external exposure of the personnel and population. Nuclear emergency preparedness and response in nuclear or radiological events have been of concern recently in international communities. Nuclear power plants may need to provide essential information regarding possible scenarios of accidental releases that might have short-term detrimental effects and long-term risks in nearby populated regions. This paper presents a synergistic integration of a source term model and a three-dimensional, time-dependent, numerical model (i.e., HOTMAC/RAPTAD), which was applied to simulate a specific scenario in which a vapor cloud was accidentally released from Maanshan (i.e., the third nuclear power plant) in South Taiwan. It aims at dealing with middle-range risk assessment for nuclear emergency preparedness and response. The solutions of such an integrated modeling platform can be found with numerical analyses that describe the processes of radionuclide generation, transport, decay, and deposition, giving the final risk assessment in a neighboring coastal city-Kaohsiung, South Taiwan. In addition, sensitivity analyses were performed to evaluate the internal consistency of model parameters, which further support the application potentials. Such a modeling technique is valuable because it can characterize the fate and transport of radioactive nuclides over the long term. The case study in South Taiwan uniquely demonstrates the feasibility and significance of such model integration.

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“…HOTMAC utilizes a 1 order turbulence closure scheme, the hydrostatic approxima- tion, and a terrain-following coordinate system (e.g., Yamada et al, 1989). The conservation equations for mass, momentum, heat, and moisture are solved numerically using the alternating direction implicit (ADI) finite difference scheme.…”

Section: A) Fluid Dynamics Codesmentioning

confidence: 99%