Simulation of winter air pollution dispersion mechanism of Kathmandu valley by water-tank experiment

2004 ◽  
Vol 7 (4) ◽  
pp. 317-329 ◽  
Author(s):  
M. L. Shrestha ◽  
A. Kaga ◽  
A. Kondo ◽  
Y. Inoue ◽  
M. Sugisawa ◽  
...  
Keyword(s):  
Air Pollution ◽  
Kathmandu Valley ◽  
Water Tank ◽  
Pollution Dispersion ◽  
Dispersion Mechanism ◽  
Tank Experiment ◽  
Water Tank Experiment ◽  
Air Pollution Dispersion

Water-tank experiment and static numerical analysis of the mooring system of a controllable depth cage

2020 ◽  
Vol 91 ◽  
pp. 102118
Author(s):  
Junbo Zhang ◽  
Hiroki Shimizu ◽  
Hirotaka Nakashima ◽  
Yoichi Mizukami ◽  
Takero Yoshida ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Mooring System ◽  
Water Tank ◽  
Tank Experiment ◽  
Water Tank Experiment

Case Study of Nanjing Inner Ring on Air Pollution Dispersion from Roadway Tunnel Portals

2012 ◽  
Vol 610-613 ◽  
pp. 1895-1900 ◽  
Author(s):  
Shu Jiang Miao ◽  
Da Fang Fu
Keyword(s):  
Air Pollution ◽  
Pollutant Dispersion ◽  
Air Pollutant ◽  
Urban Traffic ◽  
Lagrangian Model ◽  
Pollution Dispersion ◽  
Piecewise Function ◽  
Air Pollutant Dispersion ◽  
Air Pollution Dispersion

The tunnel module of a rather simple Lagrangian model GRAL (Grazer Langrange model) has been chosen to study air pollutant dispersion around tunnel portals in Nanjing inner ring. Two points have been made to popularize GRAL3.5TM (the tunnel module of a Lagrangian model GRAL; the update was in May 2003) and assure it more suitable for the actual situations in Nanjing. One is to derive a piecewise function of the intermediate parameter ‘stiffness’. Another is to take Romberg NOx-NO2 scheme into account. After these 2 works on GRAL3.5TM, NO2 dispersion from portals of all the 6 tunnels in Nanjing inner ring has been simulated. The importance of limiting urban traffic volume to control air quality around tunnel portals and roadways has been emphasized.

Simulation Program for Berthing and Mooring of Two Vessels in Consideration of Exact Hydrodynamic Interactions

2005 ◽  
Author(s):  
Shigeki Sakakibara ◽  
Masashi Wakabayashi ◽  
Kiyoshi Shimada ◽  
Hiroshi Yamaguchi
Keyword(s):  
Numerical Simulation ◽  
Crude Oil ◽  
Safety Evaluation ◽  
Simulation System ◽  
Hydrodynamic Interactions ◽  
Simulation Program ◽  
Present System ◽  
Water Tank ◽  
Tank Experiment ◽  
Water Tank Experiment

A numerical simulation system has been developed for safety evaluation of berthing and side-by-side transfer offshore operations between two vessels. Water-tank experiment has been conducted on behaviors of connected two vessels in waves, providing accuracy of the system. Also behavior of two vessels during ship-to-ship transfer offshore operation of crude oil has been simulated by the present system to demonstrate usefulness of the system.

Air Pollution Dispersion Modelling in Surrounding of Industrial Zone of City Pancevo

2004 ◽  
pp. 127-134
Author(s):  
Zoran Grsic ◽  
Predrag Milutinovic ◽  
Milena Jovasevic-Stojanovic ◽  
Dragan Dramlic ◽  
Marko Popovic
Keyword(s):  
Air Pollution ◽  
Dispersion Modelling ◽  
Industrial Zone ◽  
Pollution Dispersion ◽  
Air Pollution Dispersion ◽  
Pollution Dispersion Modelling

scholarly journals Virtual Assessment of air Pollution Dispersion from Anthropogenic Sudden Explosion

2016 ◽  
Vol 12 (2) ◽  
pp. 94-101 ◽  
Author(s):  
Marvel Lola Akinyemi ◽  
Moses Eterigho Emetere ◽  
Mojisola Rachel Usikalu
Keyword(s):  
Air Pollution ◽  
Pollution Dispersion ◽  
Air Pollution Dispersion

scholarly journals Boundary Layer Characteristics over the Central Area of the Kathmandu Valley as Revealed by Sodar Observation

2015 ◽  
Vol 20 (1) ◽  
pp. 28-35
Author(s):  
Sajan Shrestha ◽  
Saraswati Shrestha ◽  
Sangeeta Maharjan ◽  
Ram P. Regmi
Keyword(s):  
Boundary Layer ◽  
Air Pollution ◽  
Diurnal Variation ◽  
Mixing Layer ◽  
Central Area ◽  
Kathmandu Valley ◽  
Pollution Dispersion ◽  
Easterly Wind ◽  
Layer Height ◽  
Mixing Layer Height

The characteristic behavior of prevailing boundary layer over the central area of the Kathmandu valley was continuously monitored by deploying a monostatic flat array sodar during the period of 03 to 16 March 2013. Diurnal variation of wind and mixing layer height were chosen to describe the boundary layer activities over the area by considering the day of 12 March 2013 as the representative day for the period of observation. The study shows that central area of the valley remains calm or windless under stable stratification throughout the night and early morning frequently capped by northeasterly or easterly wind aloft. Strong surface level thermal inversion prevails during the period up to the height of 80m above the surface. This inversion tends to lift up as the morning progresses and reaches to the height of 875 m or so close to the noontime. Intrusion of regional winds as westerly/northwesterly and the southerly/southwesterly from the western and southwestern low-mountain passes and the river gorge in the afternoon tends to reduce the noontime mixing layer height to about 700 m. The diurnal variation of wind and mixing layer height suggest that Kathmandu valley possesses a poor air pollution dispersion power and hence the valley is predisposed to high air pollution potential.Journal of Institute of Science and Technology, 2015, 20(1): 28-35

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