The Kerala backwaters are a chain of brackish lagoons and lakes lying parallel to the Arabian Sea coast (known as the Malabar Coast) of Kerala. The network includes five large lakes linked by canals, both manmade and natural, fed by 38 rivers, and extending virtually half the length of Kerala state. The backwaters were formed by the action of waves and shore currents creating low barrier islands across the mouths of the many rivers flowing down from the Western Ghats range.

Kerala has over 900 km of interconnected waterways, rivers, lakes and inlets that make up the Kerala backwaters. In the midst of this beautiful landscape there are many towns and cities, which are the starting and end points of backwater cruises. National Waterway No. 3 from Kollam to Kottapuram, facilitates both cargo movement and backwater tourism.

The backwaters have a unique ecosystem - freshwater from the rivers meets the seawater from the Arabian Sea. In certain areas, such as the Vembanad Kayal, where a barrage has been built near Kumarakom, salt water from the sea is prevented from entering the deep inside, keeping the fresh water intact. Such fresh water is extensively used for irrigation purposes.

Many unique species of aquatic life including crabs, frogs and mudskippers, water birds such as terns, kingfishers, darters and cormorants, and animals such as otters and turtles live in and alongside the backwaters. Palm trees, pandanus shrubs, various leafy plants and bushes grow alongside the backwaters, providing a green hue to the surrounding landscape

Vembanad Kayal is the largest of the lakes, covering an area of 200 km², and bordered by Alappuzha (Alleppey), Kottayam, and Ernakulam districts. Alleppey, "Venice of the East", has a large network of canals that meander through the town. Vembanad is India’s longest lake.

ATTRACTIONS

Kettuvallam

The kettuvallams (Kerala houseboats) in the backwaters are one of the prominent tourist attractions in Kerala. More than 400 kettuvallams ply the backwaters.

The kettuvallams were traditionally used as grain barges, to transport the rice harvested in the fertile fields alongside the backwaters. Thatched roof covers over wooden hulls, 100 feet (30 m) in length, provided protection from the elements. At some point of time the boats were used as living quarters by the royalty. Converted to accommodate tourists, the houseboats have become floating cottages having a sleeping area, with western-style toilets, a dining area and a sit out on the deck. Most tourists spend the night on a house boat. Food is cooked on board by the accompanying staff – mostly having a flavour of Kerala. The houseboats are of various patterns and can be hired as per the size of the family or visiting group. The living-cum-dining room is usually open on at least three sides providing a grand view of the surroundings, including other boats, throughout the day when it is on the move. It is brought to a standstill at times of taking food and at night. Ketuvallams are motorised but generally proceed at a slow speed for smooth travel. All ketuvallams have a generator and most bedrooms are air-conditioned.

Boat Race

Chundan vallams or snake boats are narrow boats over 100 feet (30 m) long, with a raised prow that stands 10 feet (3.0 m) above water and resembles the hood of a snake. Traditionally these were used by local rulers to transport soldiers during waterfront wars. In modern times, it has spawned a new sport – theVallam Kali (boat race). Each chundan vallam accommodates about a hundred muscular oarsmen.

Boat races are occasions of great excitement and entertainment with thousands gathered on the banks to watch and cheer. Most of these races are held in the Kuttanad region of Alappuzha.