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- W2894997002 abstract "Mantanani Besar Island is located about 30 km from the nearest point of KotaBelud mainland. Increasing development and usage of its beach has proven thatthe island is very important to the local community and has a high potential for atourism destination. However, communities have stated that the island experiencedbeach erosion especially during the peak northeast monsoon (NEM) and southwestmonsoon (SWM). Limitation of baseline data regarding shoreline changes andbeach erosion at the island leads to the objectives of this study which are todetermine the long-term shoreline changes, evaluate beach morphologies (beachprofile, width, angle, slope condition and beach sediment volume) and sedimentcharacteristics at different seasonal monsoons and as well as identification oferosion based on the communities observation and opinions. The island was dividedinto four zones and five sampling stations (st) based on the cardinal direction. Zone1 located at the west (st 1), zone 2 at southern (st 2), zone 3 at eastern (st 3 and4) and zone 4 at northern (st 5) part of the island. Aerial photos (1986, 1990, 2001and 2013) and satellite images (2010) of Mantanani Besar Island were used todetect long-term changes by overlapping the images in ArcGIS 9.3 software. Fieldtrips for beach profile and sediments collection were done twice to represent NEMand SWM in 2013, 2014 and 2015. The beach morphologies calculations werebased on beach profiles data while collected sediment undergoes sand sieveanalysis to calculate the sediment mean, sorting, skewness and kurtosis. Interviewswith the community were done based on a structured questionnaire to assess thebeach erosion. Results show that the size of Mantanani Besar Island was decreasedwith estimated total land loss of 170, 838 m² since 1986. The highest land loss islocated in zone 2 with 71, 590 m2 (43%) while zone 3 was the most dynamic areabased on the obvious changes on the maps and the highest occurrence of beacherosion and accretion (16 identified beach changes). The total average value ofbeach morphologies was higher at the NEM than the SWM indicating accretionduring NEM and erosion during SWM. Mantanani Besar Island beaches dominatedwith medium sand size with the excess of finer sediment whereas the exposures ofenvironmental forces were medium with slightly higher in SWM. The sedimentsorting was achieved through cross-shore (NEM) and longshore transport (SWM).Communities observation and opinions were in line with the results of long-termshoreline changes where Mantanani Besar Island experienced beach erosion sincethe past 20 years and it occurs at all zones (highest land loss at zone 2). Beacherosion has affected the residential areas in terms of properties destructionincluding personal and public properties with few uprooted trees. The localcommunities are aware of the continuous shoreline erosion and preferred to waitfor the government actions to protect the island. The findings of this study providebaseline data (erosion and accretion area with beach dynamic during seasonalmonsoon) and can be utilized by community, tourist operators and government asa guideline for future developments and integrated management plan of the island." @default.
- W2894997002 created "2018-10-12" @default.
- W2894997002 creator A5013751831 @default.
- W2894997002 date "2016-01-01" @default.
- W2894997002 modified "2023-09-23" @default.
- W2894997002 title "Shoreline changes at MantananiBesar Island, Kota Belud, SabahMalaysia" @default.
- W2894997002 hasPublicationYear "2016" @default.
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