Coastal Region Of India Research Articles

Industrial emissions in a coastal region of India: Prediction of impact on air environment

Industrial air pollution has assumed a menacing proportion in the developing countries, including India. Its control should not be delayed any more. The economic reforms and subsequent industrial development and growing urbanization will aggregate the problem in coming years. Poor land use planning for industrial development often results in the high concentration of air pollutants in urban centers. This paper discusses the impact of industrial activities on the air environment in a coastal region of India, as a case study. A Gaussian-Plume atmospheric dispersion algorithm has been used to predict the ground level concentration of major pollutants released into the atmosphere due to industrial activities in the region. Typical diurnal variation of Pasquill's stability and mixing height over the Cochin Region were used. Ground level concentrations (GLC) of major pollutants were predicted from as many as 108 point sources from 15 industries located in the region. A roll-back approach was then applied to compute the degree of emission control required to keep the pollution levels within the permissible limits of ambient air quality.

Effect of coast on magnetotelluric measurements in India

Magnetotelluric soundings were carried out at 45 stations along a north-south profile near western coast of India. The magnetotelluric results in the E- and H-polarizatjons showed a significant difference in behaviour. Detailed two-dimensional modelling was carried out to study the effect of the western and eastern coasts of India on magnetotelluric measurements. The effect of the coast on magnetotelluric measurements was seen near the coa"t in both the polarizations. This effect was maximum in the vicinity of the coast in broad frequency range. It is suggested that magnetotelluric measurements in the coastal region of India should be carried out in the E-polarization for a reliable vertical resistivity profile.

Trace uranium analysis of water from the south-west coastal region of India

Water samples collected from various sources along the south-west coastal region of India have been analyzed for trace uranium concentration. Fission track registration technique with the “Dry method” has been used for the analysis. Uranium concentration was found to vary from 0.28±0.01 μg/l to 2.71±0.41 μg/l and was higher in sea water than in well, river and tap water, respectively.

A comparative study of microwave signal characteristics observed over two line-of-sight links

A comparative study of microwave signal characteristics has been carried out over two line-of-sight (LOS) paths at 6.7 and 6.28 GHz situated in the eastern coastal region of India. The study reveals the effect of urban climate on microwave propagation resulting in wide variation of signal fluctuations at the same frequency, over two links in the same region. The signal amplitude fading is 4 to 5 dB for DumDum-Andul (6.7 GHz) line-of-sight path, while it is 1 to 2 dB over the Calcutta-Amdanga (6.28 GHz) line-of-sight path.