http://nopr.niscpr.res.in/handle/123456789/64423 2026-10-10T16:40:53Z http://nopr.niscpr.res.in/handle/123456789/64428 Title: Linear performance assessment of offshore wind turbine jacket substructure with varying brace topology in the Indian Ocean scenario Authors: Andavar, P; Meiaraj, C Abstract: Offshore wind energy has become a rapidly growing industry; however, the harsh conditions of the ocean can pose a significant risk to the structural integrity of offshore wind turbine substructures. India's coastal and offshore regions have a high potential for wind energy due to steady winds and minimal obstructions, but the country's offshore wind potential remains largely unexplored. To address this, a study was conducted on a proposed fixed offshore platform in the Gulf of Mannar region of the Indian Ocean, supporting a 10 MW offshore wind turbine at a depth of 75 m. The study aimed to evaluate the platform's structural performance under various environmental conditions, focusing on wind energy development. The study analysed the impact of different bracing configurations, such as X, K, and V bracing systems, on the structural stability of the substructure using the finite element software, Structural Analysis Computer Software (SACS). The study also simulated pile-soil interaction to understand the platform's actual behaviour. Results indicated that the X-bracing configuration outperformed the K and V configurations in terms of overall structural stability. The study highlights the importance of considering environmental load orientations and topology characteristics in marine renewable offshore wind energy projects, as well as the significance of choosing an appropriate bracing configuration to maintain the safety, coastal sustainability and performance of offshore wind turbine substructures in the Indian Ocean. Page(s): 559-570 2024-08-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/64427 Title: Climate resilient coastal protection: A case study of dune nourishment and vegetation at Bhatye, Ratnagiri, Maharashtra Authors: Baba, M; Kurian, N P; Oswin, S D Abstract: Beaches and dunes are some of the natural mechanisms provided by nature for the protection of the coasts. Re-nourishing the eroded beaches and dunes is widely accepted as a low-cost, nature-friendly coastal protection measure. Such projects are just being initiated for the Indian coastline. A pilot dune nourishment demonstration project, following Climate Change Adaptation Guidelines for India, was attempted at Bhatye in the Ratnagiri district of Maharashtra, India. The pilot project involved the nourishment of a 500 m long eroded dune designed following the Minimum Beach Level (MBL) concept, planting of the dune with native vegetation by involving the coastal community and fencing of the dune for its protection. The dune crest height was 5.5 m above Chart Datum (CD) with slopes of 1:5 on both sides. The sand required for the nourishment was borrowed from a shoal, which was a hindrance to safe navigation to the fishing harbour at the neighbouring river entrance. The restored dune has survived five monsoons and several cyclones since its completion in January 2019. The pilot project has successfully demonstrated that low-cost dune nourishment is a feasible option to prevent flooding of low-lying coastal areas and step up the post-storm dune recovery where aeolian sediment transport is slow. Page(s): 571-583 2024-08-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/64426 Title: Molecular and phylogenetic assessment of foliose Ulva Linnaeus, (Ulvophyceae, Chlorophyta) in Indian subcontinent Authors: Rani, P; Yadav, D S; Kaur, M; Maurya, R K; Bast, F Abstract: Green algae, Ulva Linnaeus, 1753 (Ulvales, Chlorophyta), is found abundantly in intertidal regions of the coasts. Members of the genus exist in foliose, filamentous, and tubular forms and may be distromatic or monostromatic. This study investigates the phylogenetic distribution of foliose Ulva from various geographical locations in India. The morphological and microscopic features of 20 specimens were studied, and ITS, tufA, 18S, and atpB regions were sequenced using specific primers. BLAST results were used for similarity search and MEGAX for phylogenetic reconstruction using these amplified sequences. A total of 35 sequences were generated and used to trace back the evolution of different species and the effects of geographical locations on the cryptic diversity of Ulva. Also, this study reports the occurrence of Ulva fasciata, Ulva reticulata, Ulva taeniata, Ulva linza, and Ulva ohnoi. A pressed herbarium voucher was prepared for future records of each sample. Page(s): 584-596 2024-08-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/64425 Title: Diversity, temporal abundance, length-weight relationships and condition factors of Lutjanidae from central east coast of India Authors: Swain, R; Patra, S; Kisku, S; Mishra, A; Nayak, L; Patro, S; Mohapatra, Anil Abstract: Fifteen fish species from the family Lutjanidae were recorded from the Gopalpur fish landing centre, which includes one new record (Lutjanus xanthopinnis Iwatsuki, Tanaka & Allen, 2015) from the Southern Odisha, central east coast of India. This study reports length weight relationship for 11 lutjanid species and for Lutjanus guilcheri Fourmanoir, 1959, the LWR was recorded for the first time from the Indian coast. The ‘b’ value ranges between 2.7 to 3.1. However, the seasonal analysis shows a lower ‘b’ value for L. johnii during pre-monsoon (2.126) and monsoon (2.186), which is probably due to the high number of juveniles in the sample. The mean value of condition factor (K) ranged between 1.36 and 1.84. The comparative analysis of the ‘b’ values of the studied species from different regions of the east coast of India suggests that the overall environmental parameters in the western Bay of Bengal are favourable for their growth. Page(s): 597-604 2024-08-01T00:00:00Z