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Geographical Overview of Sundarban Basin

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The Sundarbans mangrove forests, one of the largest forests in the world (140,000 ha), lie on the delta of the Ganges, Brahmaputra, and Meghna streams on the Bay of Bengal. It is neighboring the boundary of India’s Sundarbans World Heritage Site engraved in 1987. The site is met by an intricate organization of flowing streams, mudflats, and little islands of salt-tolerant mangrove timberlands, and presents a great instance of continuous biological cycles. The region is known for its intensive kind of fauna, together with 260 bird species, including the Bengal tiger, and other undermined species like the estuarine crocodile and the Indian python.

The exact meaning of Sundarbans is “beautiful forests”. On the other hand, it was recommended that the name is a debasement of Samudraban, Shomudrobôn (“Sea Forest”), or Chandra-band, the name of a clan. Notwithstanding, the logical beginning of the word is Sundry or Sundri, the nearby name of the mangrove species Heritiera fomes bountiful nearby.

Sundarbans Basin

Sundarban Basin

Geographical Overview of Sundarban Basin

The geography is overwhelmed by deltaic developments that incorporate endless seepage lines related to surface and underwater levees, spreads, and salt marshes. There are likewise minor bogs above mean tide level, flowing shoals, and islands with their organizations of flowing channels, underwater distal bars, and pro-delta muds and residue silt. The Sundarbans’ floor fluctuates from 0.9 to 2.11 meters above ocean level.

Biotic elements here assume a critical part in actual seaside development, and for natural life, an assortment of environments have been created which incorporate sea shores, estuaries, long-lasting and semi-super durable bogs, salt marshes, flowing brooks, waterfront hills, back rises, and levees. The mangrove vegetation itself aids the development of a new expanse of land and the intertidal vegetation assumes a huge part in swamp morphology. The exercises of mangrove fauna in the intertidal mudflats create micromorphological highlights that snare and hold silt to make a base for mangrove seeds. The morphology and advancement of the eolian rises are constrained by an overflow of xerophytic and halophytic plants. Creepers, grasses, and sedges settle sand hills and uncompacted silt. 

The Sundarbans mudflats are found at the estuary and on the deltaic islands where low speed of stream and flowing current happens. The pads are uncovered in low tides and lowered in elevated tides, consequently being changed morphologically even in one flowing cycle. The tides are enormous to such an extent that roughly 33% of the land vanishes and returns each day. The inside pieces of the mudflats act as an ideal home for mangroves.

Protection and Management Requirements

There are three wildlife sanctuaries and an effective history of national legal protection of land, forest, and aquatic environment can be found. The sanctuaries were established under Bangladesh Wildlife Act 1974, which controlled activities like entry, movement, fishing, hunting as well extraction. Many researchers have been conducted on Sundarbans and international importance is also felt. Sundarbans provide a sustainable livelihood for millions of people and shelter to many.

FAQs on Geographical Overview of Sundarbans Basin

Q 1. In which river basin is the Sundarbans Delta?

Answer-

Sundarban delta is in the lower part of the Padma or Ganges- Brahmaputra river delta.

Q 2. What are Sundarbans famous for?

Answer-

The Sundarbans area unit far farmed for globally endangered species as well as the Royal Bengal Tiger, Ganges river and Irawadi dolphins, estuarine crocodiles, and therefore the critically vulnerable endemic river terrapin. It is the only mangrove habitat in the world for Panthera Tigris.

Q 3. Which soil is found in Sundarbans?

Answer-

The Sundarbans forests comprise mainly saline alluvial soil. It consists of clay, silt, fine sand, and coarse sand particles.

Q 4. Why Sundarbans is a unique wilderness in the world?

Answer-

The Sundarbans, natural mangrove forests of cover an area of 577,000 ha. It is the biggest single tract of mangrove forests on the planet. The members of the family Rhizophoraceae don’t overwhelm the tree vegetation of the Sundarbans. Heritiera fomes and Excoecaria agallocha are the two most broadly happening tree species in the forests and they are members of Sterculiaceae and Euphorbiaceous separately. 

The forest is exceptionally loaded in multifariousness and supports numerous types of around 334 plants, 120 fishes, thirty-five reptiles, 270 birds, and forty-two mammals. The Sundarbans is the only living habitat of the popular Royal Bengal Tiger and estuarine crocodile.


Last Updated : 12 Jun, 2023
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