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The Study of Angular Distribution of UV Radiation at various sites of Kathmandu Valley, Nepal

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Author Affiliations

  • 1Department of Physics, Patan Multiple Campus, Patan Dhoka, Lalitpur, Tribhuvan University, Kathmandu, Nepal
  • 2Department of Physics, Institute of Engineering, Tribhuvan University, Kathmandu, Nepal

Res. J. Physical Sci., Volume 4, Issue (7), Pages 11-20, September,4 (2016)

Abstract

Solar radiation hazard is a global problem in the world. Though the solar radiation falling on atmosphere is taken as constant but it varies widely due to local effects. This paper primarily focusses on measurement and comparative analysis of solar irradiance in different locations Kathmandu, Nepal using UV meter model 3D. Radiation is measured at different inclinations (00, 150, 300, 450, 600, 750& 900) in different directions (East, West, North & South). Experimental result showed that amount of radiation incident at particular place is directly dependent on optical depth and fluctuations on results are caused by local parameters like pollution, daylight time, inclination, orientation and others. Maximum UV flux density was found at 450 on South at noon time at each locations. Also strong correlation between theoretical result and experimental result is found. Result of this research work is beneficial for the further identification, impact and analysis of radiation at different places, taking safety measures in priority basis thus improving life of flora & fauna and protecting the whole environment.

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