http://nopr.niscpr.res.in/handle/123456789/40790 2026-10-09T21:49:21Z 2026-10-09T21:49:21Z Rajendra, K Balaji, R Mukul, P http://nopr.niscpr.res.in/handle/123456789/40819 2017-03-17T07:14:26Z 2017-03-01T00:00:00Z

Title: Review of Indian research on innovative breakwaters Authors: Rajendra, K; Balaji, R; Mukul, P Abstract: In this paper, a detailed review of Indian research studies on the development of innovative breakwaters is attempted. Historical studies by Indian researchers and scientists were collected and classified in to two broad categories; fixed and floating breakwaters. The first part, Part I, discusses the studies pertaining to different types of fixed breakwaters, whereas, the Part II describes the studies related to floating breakwaters. Page(s): 431-452

2017-03-01T00:00:00Z Wang, Qing Wang, Yun Liu, Zhiwei Guo, Shiguang http://nopr.niscpr.res.in/handle/123456789/40818 2017-03-17T07:12:11Z 2017-03-01T00:00:00Z

Title: Anisotropic multi-component seismic identification of gas hydrate in deep water environments of Shenhu area in the South China Sea Authors: Wang, Qing; Wang, Yun; Liu, Zhiwei; Guo, Shiguang Abstract: Gas hydrate bearing zone are significantly affected by anisotropy in Shenhu area, South China Sea. The research takes the changing velocity field of sea water and anisotropic elastic parameters into account to models for simulation. Full-wave field forward simulation data with different saturation of gas hydrate has been generated. Anisotropy field separation method is used to provide more accurate seismic data of pp and ps waves. Study shows that anisotropy has a significant impact on multi-component AVA characteristics, the values of gradient and polarity reversal angle. In addition, multi-component sweetness seismic attribute can be used as significant seismic attribute to identify gas hydrate reservoirs. Page(s): 453-461

2017-03-01T00:00:00Z Han, Youwei Wang, Xiangchun http://nopr.niscpr.res.in/handle/123456789/40817 2017-03-17T07:10:16Z 2017-03-01T00:00:00Z

Title: Relocating ocean-bottom seismometers Authors: Han, Youwei; Wang, Xiangchun Abstract: Here, a time-slice relocation method was used to relocate the position of Ocean bottom seismometers (OBSs) on the sea bottom in the South China Sea because this method has a high level of accuracy. Commonly used three-point relocation method was also used to compare the accuracy of the two techniques. Results indicated that the time-slice relocation method was more accurate than the three-point relocation method. Page(s): 462-465

2017-03-01T00:00:00Z Qing, FENG Xiao-ping, LI Yan-shuang, ZHENG http://nopr.niscpr.res.in/handle/123456789/40816 2017-03-17T07:08:41Z 2017-03-01T00:00:00Z

Title: Discussion on a general formula of sediment diffusion coefficient and sediment fluctuating intensities in the sediment-laden flow Authors: Qing, FENG; Xiao-ping, LI; Yan-shuang, ZHENG Abstract: According to the research achievement of velocity fluctuating intensities, the formula of sediment fluctuating intensities is raised analogically and is verified with the experimental data. The results show that the formula structure could preferably conform to the distribution tendency. A general expression about SDC (sediment diffusion coefficient) is deduced to describe the three types of SDC. Meanwhile, a simple-structure SSC (suspended sediment concentration) profile formula is obtained for depicting the situation largest SSC absent from the bottom. The classic field data as well as experimental results of three types SDC and the measured data in the hyper concentration flow are applied to calibrate the SDC profile formula, and the data of flume experiments and pipeline tests are utilized to validate the SSC profile formula. With a discussion of the value range of relevant parameters of the SDC and SSC equations in different water-sediment environments, the conclusion is gained that the parameters in higher concentration flow are relatively steady while the mutative amplitude of the ones in lower concentration is comparative larger. Page(s): 466-479

2017-03-01T00:00:00Z