Madagascar: Coastal Hazards

Madagascar: Coastal Hazards

Madagascar does experience coastal hazards. It is not a secret why so many people want to live in the coastal regions. There is beauty in it, but also great precautions. Although, coastal hazards are prone to many natural hazards such as erosion, big storms, flooding, tsunamis, and sea level rise. Madagascar experiences all of these hazards on their small continent.

One of the critical reasons Madagascar experiences coastal issues is due to sea level rising. Sea level rising occurs with the effects of global warming. This happens when water from melting ice sheets and glaciers with the expansion of seawater. Shoreline erosion generated by sea level rise is a substantial issue to the coastal ports and beaches of Madagascar. In Madagascar, the yearlong rise is about 3 mm per year. “Regional variations exist due to natural variability in regional winds and ocean currents, which can occur over periods of days to months or even decades.” 

Rising sea levels contribute to coastal flooding. Coastal flooding commonly takes effect when dry and low-lying land inundated by seawater. Currently, Madagascar has a high hazard level of coastal flooding. Within the next ten years or sooner, potential damaging waves are anticipated to flood the coast at least once. In order to prepare for this coastal flood, project planning decisions can be made. For instance, if Madagascar had unlimited resources and salary, a hard stabilization of jetties would be beneficial. Jetties are built in harbors to maintain harbors. The jetties extend into the ocean at the entrances of rivers and harbors. Jetties can be considered as a construction method for coastal flooding. As of right now, Madagascar still has the 9-3-0 Hotline for Natural Disasters.

Jetty







Madagascar Coastal Hazard Level: High










Comments

  1. Eva CalzadaApril 28, 2023 at 2:53 PM

    Hi Sabrina,
    It seems that theres a common theme in these coastal communities and it's the fact that the rising sea levels are one of the most major hazards. It just goes to show how much of an issue climate change is in certain parts of the world right now, and that it's something we need to pay attention to. Great job!

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