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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Variations in nearshore processes along Nagapattinam coast, India
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Variations in nearshore processes along Nagapattinam coast, India

机译：印度Nagapattinam海岸近岸过程的变化

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Directional wave data collected at 10 m water depth, at 2 km distance off Nagore from March 1998 to February 1999, were used to estimate the longshore currents and longshore sediment transport rate considering the sea and swell waves separately using the CERC formula. Daily littoral environmental parameters were observed at three stations and longshore sediment transport rate was estimated using Walton's equation. A comparative study was carried out on theoretical and measured longshore currents. The ratio of spectral energy at the first and second spectral peaks shows that energy at the second peak was more than 50% of the energy at the first peak in 43% of the data collected, due to the presence of sea and swell waves. The difference between the sediment transport rate estimated based on the two methods is around 3.5%. The sediment transport using CERC formula shows that average annual gross transport was 0.448 x 10(6) m(3) and the average annual net transport (towards south) was 0.098 x 10(6) m(3) and this contributes to the supply of sediment to the Palk Bay. [References: 28]
机译：从1998年3月至1999年2月，在距Nagore 2 km距离，水深10 m处收集的定向波数据被用于估计独立的海浪和涌浪，并使用CERC公式估算了长岸流和长岸沉积物的传输速率。每天在三个站点观察沿海环境参数，并使用沃尔顿方程估算近岸沉积物的运移速率。对理论和测量的近岸洋流进行了比较研究。在第一和第二光谱峰处的光谱能量之比表明，由于存在海浪和涌浪，第二个峰处的能量占所收集数据的43％中第一个峰处能量的50％以上。根据这两种方法估算的沉积物迁移率之间的差异约为3.5％。使用CERC公式的泥沙输送量表明，年平均总输送量为0.448 x 10（6）m（3），年平均净输送量（向南）为0.098 x 10（6）m（3），这有助于供应沉积物到帕克湾。 [参考：28]

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