The 2004 Tsunami made people realize that mangroves can serve as a reliable safety hedge against coastal calamities. How do mangroves function as a safety hedge?

Mangroves function as a safety hedge primarily due to their complex physical structure. Their extensive aerial root systems, including prop roots and pneumatophores, stabilize coastal shores and impede water flow [2]. These dense root networks and branches act as a physical barrier that attenuates wave energy, reduces wave height, and slows down water velocity during tsunamis and storm surges [1]. Unlike other vegetation, mangroves are specifically adapted to withstand high-energy tides and storms without being easily uprooted, provided the forest is sufficiently wide. While they do provide food and medicine [4], their primary role as a 'safety hedge' or 'green shield' against coastal calamities is their ability to absorb and dissipate the destructive force of waves through their specialized root systems and dense vegetation [3].

Sources

1. [1] Environment, Shankar IAS Acedemy .(ed 10th) > Chapter 4: Aquatic Ecosystem > 4.8.2. Role of mangroves > p. 48
2. [2] FUNDAMENTALS OF PHYSICAL GEOGRAPHY, Geography Class XI (NCERT 2025 ed.) > Chapter 6: Landforms and their Evolution > Bars, Barriers and Spits > p. 59
3. [4] Environment and Ecology, Majid Hussain (Access publishing 3rd ed.) > Chapter 4: BIODIVERSITY > Social and Ecological Significance of Mangroves > p. 53
4. [3] Geography of India ,Majid Husain, (McGrawHill 9th ed.) > Chapter 5: Natural Vegetation and National Parks > MANGROVES > p. 52