scholarly journals Crosswind integrated concentration for various dispersion parameter systems

MAUSAM ◽  
2021 ◽  
Vol 64 (4) ◽  
pp. 645-654
Author(s):  
KHALED SMESSA ◽  
SOAD METMAN
Keyword(s):  
Wind Profile ◽  
Dispersion Parameter ◽  
Diffusion Experiment ◽  
Gaussian Plume Model ◽  
Dispersion Parameters ◽  
Plume Model ◽  
Statistical Measures ◽  
Gaussian Plume ◽  
Release Height ◽  
Logarithmic Wind Profile

LFkkuh; Lrj izdh.kZu ds fy, xkSlh;u fiPNd ekWMy ¼Gaussian Plume Model½ dk O;kid :i ls iz;ksx fd;k tkrk gSA vuqizLFk iou dh dqy lkanzrk Kkr djus ds fy, xkSlh;u lw= ¼QkWewyk½ dks laxfBr fd;k gSA vuqizLFk iou dh dqy lkanzrk dh x.kuk djus ds fy, izdh.kZu izkpyksa dh fHkUu&fHkUu iz.kkfy;ksa dk mi;ksx fd;k x;k gSA lrg Lrj esa Å¡pkbZ ds vuqlkj iou xfr dh fHkUurk dk o.kZu djus ds fy, ykxfjFehd foaM izksQkby dk mi;ksx fd;k x;k gSA blesa NksM+h tkus okyh izHkkoh Å¡pkbZ dks /;ku  esa j[kk x;k gSA fHkUu fHkUu izdh.kZu izkpy iz.kkfy;ksa ds fy, iwokZuqekfur lkanzrkvksa vkSj dksisugsxu ds folj.k iz;ksx ls izkIr fd, x, izsf{kr vk¡dM+ksa dh rqyuk djus ds fy, lkaf[;dh; ifjekiksa dk mi;ksx fd;k x;k gSA  The Gaussian plume model is the most widely used model for local scale dispersion. The   Gaussian formula has been integrated to obtain the crosswind-integrated concentration. Different systems of dispersion parameters are used to calculate the crosswind integrated concentration. A logarithmic wind profile is used to describe the variation of wind speed with height in the surface layer. The effective release height was taken into consideration. Statistical measures are utilized in the comparison between the predicted concentrations for different dispersion parameter systems and the observed concentrations data obtained from Copenhagen diffusion experiment.

scholarly journals Estimation of Radioactivity Release Activity Using Non-Linear Kalman Filter-Based Estimation Techniques

Energies ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3985
Author(s):  
Victor M. Becerra ◽  
Vineet Vajpayee ◽  
Nils Bausch ◽  
T.V. Santhosh ◽  
Gopika Vinod ◽  
...  
Keyword(s):  
Kalman Filter ◽  
Dose Rate ◽  
Gaussian Plume Model ◽  
Estimation Techniques ◽  
Plume Model ◽  
Dose Rates ◽  
Statistical Measures ◽  
Cubature Kalman Filter ◽  
Non Linear ◽  
Gaussian Plume

The estimation of radioactivity release following an accident in a nuclear power plant is crucial due to its short and long-term impacts on the surrounding population and the environment. In the case of any accidental release, the activity needs to be estimated quickly and reliably to effectively plan a rapid emergency response and design an appropriate evacuation strategy. The accurate prediction of incurred dose rate during normal or accident scenario is another important aspect. In this article, three different non-linear estimation techniques, extended Kalman filter, unscented Kalman filter, and cubature Kalman filter are proposed in order to estimate release activity and to improve the prediction of dose rates. Radionuclide release rate, average wind speed, and height of release are estimated using the dose rate monitors data collected in proximity of the release point. Further, the estimates are employed to improve the prediction of dose rates. The atmospheric dispersion phenomenon of radioactivity release is modelled using the Gaussian plume model. The Gaussian plume model is then employed for the calculation of dose rates. A variety of atmospheric and accident related scenarios for single source and multiple sources are studied in order to assess the efficacy of the proposed filters. Statistical measures have been used in order to validate the performance of the proposed approaches.

Optimisation of dispersion parameters of Gaussian plume model for CO2 dispersion

2015 ◽  
Vol 22 (22) ◽  
pp. 18288-18299 ◽  
Author(s):  
Xiong Liu ◽  
Ajit Godbole ◽  
Cheng Lu ◽  
Guillaume Michal ◽  
Philip Venton
Keyword(s):  
Gaussian Plume Model ◽  
Dispersion Parameters ◽  
Plume Model ◽  
Gaussian Plume

scholarly journals Derivation of the Gaussian plume model in three dimensions

MAUSAM ◽  
2021 ◽  
Vol 65 (1) ◽  
pp. 83-92
Author(s):  
M.M. ABDELWAHAB ◽  
KHALED S.M.ESSA ◽  
H.M. ELSMAN ◽  
A.SH. SOLIMAN ◽  
S.M. ELGMMAL ◽  
...  
Keyword(s):  
Power Law ◽  
Eddy Diffusivity ◽  
Three Dimensions ◽  
Gaussian Plume Model ◽  
Concentration Data ◽  
Plume Model ◽  
Advection Diffusion Equation ◽  
Statistical Measures ◽  
Advection Diffusion ◽  
Gaussian Plume

Gaussian plume model is a common model to study advection diffusion equation which is solved in three dimensions by using Laplace transformation considering constant eddy diffusivity and wind speed power law. Different schemes such as Irwin, Power Law, Briggs and Standard methods are used to obtain crosswind integrated concentration. Statistical measures are used in this paper to know which is the best scheme which agrees with the observed concentration data obtained from Copenhagen, Denmark. The results of model are compared with observed data.

scholarly journals Pollutant dispersion over Industrial Sub-urban area (Helwan)

MAUSAM ◽  
2021 ◽  
Vol 43 (3) ◽  
pp. 311-314
Author(s):  
M.A.El- Shahawi ◽  
A.B. MAYHOUB ◽  
S. M. ETMAN
Keyword(s):  
Urban Area ◽  
Maximum Concentration ◽  
Pollutant Dispersion ◽  
Industrial Area ◽  
Plume Rise ◽  
Gaussian Plume Model ◽  
Dispersion Parameters ◽  
Cement Production ◽  
Gaussian Plume ◽  
Release Height

The concentration of pollutants released from one chimney of the National Company for cement production in Helwan industrial area has been calculated; The calculations are based on the Gaussian plume model covering the period June 1988-May .1989. A method has been presented to calculate the dispersion parameters ay and az in horizontal and vertical directions respectively. The method rely on two-level observation of both wind velocity and temperature. The plume rise correction recommended by Briggs has been adopted to calculate the effective release height (stack height~ plus the plume rise).. The maximum concentration values for different heights and their1otations have been calculated.

scholarly journals Derivation the Schemes of Lateral and Vertical Dispersion Parameters: Application in Gaussian Plume Model

2013 ◽  
Vol 02 (01) ◽  
pp. 19-24
Author(s):  
Mohamed M. Abdel-Wahab ◽  
Khaled S. M. Essa ◽  
Mokhtar Embaby ◽  
Sawsan E. M. Elsaid
Keyword(s):  
Gaussian Plume Model ◽  
Dispersion Parameters ◽  
Plume Model ◽  
Vertical Dispersion ◽  
Gaussian Plume

scholarly journals Box and Gaussian plume models of the exhaust composition evolution of subsonic transport aircraft in- and out of the flight corridor

1997 ◽  
Vol 15 (1) ◽  
pp. 88-96 ◽  
Author(s):  
I. L. Karol ◽  
Y. E. Ozolin ◽  
E. V. Rozanov
Keyword(s):  
Air Entrainment ◽  
Ambient Air ◽  
Background Concentration ◽  
Plume Dispersion ◽  
Gaussian Plume Model ◽  
Dispersion Parameters ◽  
Transport Aircraft ◽  
Sources And Sinks ◽  
Plume Model ◽  
Gaussian Plume

Abstract. A box and a Gaussian plume model including gas-phase photochemistry and with plume dispersion parameters estimated from the few available plume observations are proposed and used for evaluation of photochemical transformations of exhausts from a single subsonic transport aircraft. The effects of concentration inhomogeneities in the plume cross section on the photochemical sources and sinks in the plume are analyzed for various groups of compounds. The influence of these inhomogeneities on the rate and on the mass of ambient air entrainment into the plume are studied also by comparing the box and the Gaussian plume model simulations during the first hours of their "life''. Due to the enterance of HOx and NOx from ambient air into the plume with rates varying from the wind shear and turbulence conditions, the rate of emitted NOx oxidation in the plume is dependent on these and also on the background concentration levels of HOx and NOx.

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