Studies on assessment of traffic noise level in Aurangabad city, India.
ABSTRACT With the rapid rate of urbanization of Aurangabad city due to the expanding industrialization, the problem of noise pollution has become a concern for urban dwellers and government authority too. Noise pollution due to vehicular traffic is one of the growing environmental problems of urban centers. The study deals with the assessment of traffic noise levels in Aurangabad city. With respect to the total number of vehicles passing the road in unit time, which was surveyed by direct count method, six different sites from Aurangabad city, viz., Nagar Naka, Kranti Chowk, CIDCO bus stand, Railway station area, Dhoot Hospital and Baba petrol pump were selected to study the vehicular noise level. Noise measurements were carried out at these six locations on both working day and holiday during the peak traffic hours, i.e. 8:00 a.m. - 11:a.m., 1:00 p.m. - 4:00 p.m. and 5:00 p.m. - 8:00 p.m., in the morning, afternoon and evening sessions, respectively, after 5 minutes time interval. The noise level was monitored using noise level meter. The results obtained from this investigation showed that the Nagar Naka, Kranti chowk and CIDCO bus stand area have dense traffic zones when compared with the Railway station area, Dhoot Hospital and Baba petrol pump. The minimum and the maximum noise levels are 74 and 86 dB, respectively, on working day and 70 and 81 dB, respectively, on holiday. The measured noise level values exceed the prescribed noise level.
Article: Assessment of Impact of climate change with reference to elevated CO2 on rice brown plant hopper, Nilaparvata lugens (Stal) and crop yield[show abstract] [hide abstract]
ABSTRACT: Impact of elevated CO2 on the rice brown planthopper (BPH), Nilaparvata lugens (Stal.) population and rice yield was assessed in open-top chambers during kharif 2010 and 2011. Brachypterous females laid more eggs (324.3 ± 112.3 eggs/female) on the rice plants exposed to elevated CO2 (570 ± 25 ppm) than 380 ppm ambient CO2 (231.7 ± 31.8 eggs). Elevated CO2 exhibited positive effect on BPH multiplication and resulted in more than a doubling of its population (435.4 ± 62.0 hoppers/ hill) at peak incidence compared to ambient CO2 (121.4 ± 36.8 hoppers/hill) during kharif 2010; corresponding populations being 113.0 ± 11.5 and 47.0 ± 8.1 hoppers/hill during kharif 2011 respectively. Besides, honeydew excretion was observed to be 74.41% more under elevated CO2 (187.6 ± 44.8 mm2/5 females) than ambient CO2 (48 ± 20.1 mm2/5 females). On the other hand, high CO2 exhibited nutritive effect on uninfested rice crop through 21.6%, 15.3% and 14.1% increase in the number of tillers, reproductive tillers and seeds/panicle respectively, and as a consequence increased grain by 11.1% compared to ambient CO2. However, despite the nutritive effect, crop under elevated CO2 suffered higher yield loss (26.5%) due to higher BPH population as well as sucking rate compared to ambient CO2 (12.4%).Current science 11/2012; 103(10):1201-1205. · 0.94 Impact Factor