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Quantitative Estimation of Coastal Changes Along Selected Locations of Karnataka, India: A GIS and Remote Sensing Approach 被引量:6
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作者 P. Vinayaraj glejin Johnson +3 位作者 g. udhaba dora C. Sajiv Philip V. Sanil Kumar R. gowthaman 《International Journal of Geosciences》 2011年第4期385-393,共9页
Qualitative and quantitative studies on changes of coastal geomorphology and shoreline of Karnataka, India have been carried out using toposheets of Survey of India and satellite imageries (IRS-P6 and IRS-1D). Changes... Qualitative and quantitative studies on changes of coastal geomorphology and shoreline of Karnataka, India have been carried out using toposheets of Survey of India and satellite imageries (IRS-P6 and IRS-1D). Changes during 30 years period are studied at each station. Significant morphological changes in landforms like spit, channel Island, coastal plain, tidal flat, lateritic plain, alluvial plain and sand bar within and adjcent to estuarine river mouths of Kali, Sharavathi, Kollur-Chakkara - Haladi and Udyavara Rivers are observed. The study indicates that gradual erosion is observed at i) Karwar spit along the northern side of the Kali river mouth, ii) the spit at the southern side of the Sharavathi river mouth and iii) at some regions of Kundapur. 展开更多
关键词 COASTAL GEOMORPHOLOGY SHORELINE COASTAL zone Erosion ACCRETION BEACH
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Variations in Swells along Eastern Arabian Sea during the Summer Monsoon
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作者 glejin Johnson V. Sanil Kumar +5 位作者 Sajiv Philip Chempalayil Jai Singh Premanand Pednekar K. Ashok Kumar g. udhaba dora Rajamanickam gowthaman 《Open Journal of Marine Science》 2012年第2期43-50,共8页
A study was carried out to find the variation in wave characteristics along the eastern Arabian Sea and the influence of swells in the nearshore waves at 3 locations during summer monsoon in 2010. Percentage of swells... A study was carried out to find the variation in wave characteristics along the eastern Arabian Sea and the influence of swells in the nearshore waves at 3 locations during summer monsoon in 2010. Percentage of swells in the measured waves was 75% to 79% at the locations with higher percentage of swells in the northern portion of Arabian Sea com-pared to that at the southern side. The significant wave height up to 4.7 m and maximum wave height up to 7.4 m was observed. The wave height was increasing from south to north with the average significant wave height at the northern location 20% more than that at the southern location due to the increase in the swell height. Waves having spectral peak period less than 6 s were not present during the summer monsoon period. There was no change in the average value of wave statistical parameters for data collected at 1/2, 3, 6, 12 and 24 h interval. 展开更多
关键词 SEAS Swells Wind WAVES Arabian SEA Mixed SEA State Wave Spectrum
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