The Hamilton Canal is a 14.5 km (9.0 mi) canal connecting Colombo to Negombo in Sri Lanka. The canal was constructed by the British in 1802 and completed in 1804. It was designed to drain salt water out of the Muthurajawela wetlands. The canal was named after Gavin Hamilton, the Government Agent of Revenue and Commerce.
Muthurajawela is a marsh in Sri Lanka in the southern region of the Negombo lagoon, 30 km north of Colombo. It is the island’s largest peat bog, and is notable for its unique and highly diverse ecosystem. “Muthurajawela” translates to “Swamp of Royal Treasure”.
The marsh is believed to have originated about 7000 years ago. Muthurajawela was declared as a sanctuary by the Sri Lankan government in 1996 in recognition of its vast bio-diversity. The region supports 192 distinct species of flora and 209 distinct species of fauna, including Slender Loris, as well as another 102 species of birds. Some of the identified species have been shown to be indigenous to the marsh.
The marsh is a major local and tourist attraction, primarily for sightseeing and boating tours, and the area also supports local agriculture and forestry. Visitors to the region are guided through the sanctuary areas by the staff of the Muthurajawela Marsh Centre to avoid serious harm to the marsh ecosystem.
Negombo Lagoon is a large estuarine lagoon in Negombo, south-west Sri Lanka.
The lagoon is fed by a number of small rivers and a canal. It is linked to the sea by a narrow channel to the north, near Negombo city. It is surrounded by a densely populated region containing rice paddies, coconut plantations and grassland. The land is used for fishing and agriculture. The lagoon has extensive mangrove swamps and attracts a wide variety of water birds including cormorants, herons, egrets, gulls, terns and other shorebirds. Negombo, Katunayake, Seeduwa are some nearby towns.