Risk Assessment of Fishing Trawl Activities to Subsea Pipelines of Sabah and Labuan Waters.

Ahmad Faizal Ahmad Fuad,Mohd Hafizi Said,Mohd Hairil Mohd,Khalid Samo,Ismail Zainol,Mohd Asamudin A Rahman

doi:10.1155/2020/6957171

Ahmad Faizal Ahmad Fuad, Mohd Hafizi Said + Show 4 more

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https://doi.org/10.1155/2020/6957171

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Abstract

Introduction. Trawling is a method of catching fish in a large volume where fish nets are pulled through water using one or two boats. Bottom trawling is where the nets are pulled over on the seabed. The gear of the bottom trawling would impact the exposed subsea pipeline, on the seabed. Subsea pipelines transport crude oil and gas from the offshore platform to shore facility. This study assesses the risk of fish trawling activities to the subsea pipelines at Sabah and Labuan offshore. The specification of trawl equipment used by local trawlers in Sabah was determined by the on-site survey. The frequency of a fish trawler crossing over the pipelines was calculated based interview on operation and site survey. The calculation of the pull-over load of the otter board was calculated using the DNVGL algorithm. The severity and frequency index of the risk matrix was developed based on literature review. Results showed that the pull-over load of the otter board would not damage the pipelines. The risk posed by the fish trawler activity to the pipelines is low and moderate.

Highlights

Trawling is a method of catching fish in a large volume where fish nets are pulled through water using one or two boats
Sabah fisheries and aquaculture industries produce nearly 200,000 metric tons of fish annually and contribute to Sabah’s annual Gross Domestic Product by 2.8%. e marine capture fishery is the major contributor, which accounts for about 80% of the statistics. is is a catalyst by various fishing gear methods used by the fisherman in Sabah. e main fishing method that contributes to the total catches is the trawl net
Several methods were used to achieve the main objective. e overall research activities are shown in Figure 2. e explanation of each process is given in the following paragraphs

Summary

Introduction

Trawling is a method of catching fish in a large volume where fish nets are pulled through water using one or two boats. Bottom trawling is where the nets are pulled over on the seabed. E gear of the bottom trawling would impact the exposed subsea pipeline, on the seabed. Is study assesses the risk of fish trawling activities to the subsea pipelines at Sabah and Labuan offshore. E frequency of a fish trawler crossing over the pipelines was calculated based interview on operation and site survey. Seas of Sulu, Sulawesi, and South China, which surround Sabah, contribute to 41.8% in marine fish catches in Malaysia. E main fishing method that contributes to the total catches is the trawl net. Trawling is a method of fishing where fish nets are pulled through water using one or two boats.

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