Lably
Skip to content

Bikenibeu

  • 4 min read
  • 4 chapters

Related on Lably

Through Sea level rise, El Niño–Southern Oscillation and Coconut

Location

Bikenibeu is one of the three main urban centres in South Tarawa, the others being Betio and Teaoraereke. Starting in 1963, causeways began to be built between the islands of the atoll to make communications easier. The causeways connected Bairiki to Bikenibeu by 1963, and extended from Bikenibeu to Bonriki by 1964, when flights began from the new airport to Fiji.

Bikenibeu island lies between the Tarawa Lagoon to the north, with a maximum depth of 25 metres (82 ft), and the Pacific Ocean to the south, with a depth of up to 4,000 metres (13,000 ft).

The island has been built from sediments from the lagoon.

The process of soil accumulation is driven by the dominant easterly trade winds, and can be reversed during extended periods of westerly winds during El Niño–Southern Oscillations.

Bikenibeu is an average of 3.25 metres (10.7 ft) above sea level on the ocean side, and 2.38 metres (7 ft 10 in) at the lagoon side. Tidal flats on the ocean side extend for 160 metres (520 ft).

ACLR (Accelerated Sea-Level Rise) is a serious concern. In a scenario where a sea level rise of .5 metres (1 ft 8 in) occurs, 71% of Bikenibeu would be flooded by a spring high tide. With a rise of .95 metres (3 ft 1 in) the tide would flood the entire island.

As of 2000, the lagoon away from the shore was still relatively free of human contaminants. However, the causeways linking the islands of South Tarawa have contributed to increasing pollution in the lagoon.

The coral reefs provide natural protection to the coastline, important if sea levels rise. A 2000 report noted large numbers of dead corals on the reef flats on the ocean side, apparently due to past discharges of sewerage. The causeways and land reclamation have also affected the reef environment.

Other environmental problems caused by the growing population include over-fishing and reduction of useful plants and trees such as coconuts.

Sign in to keep reading

3 more chapters are free with a Lably account.

More in Cities