Maduganga is located in the southwestern region of Sri Lanka where the southwestern group of crystalline rocks, which is one of the upper Paleozoic rock formations, predominates. Bog and half bog soils dominate this area. A total of 15 islands within the estuary are surrounded by water throughout the year, with Ma Duwa, Mirala Duwa and Dik Duwa forming the large islands. The Maduganga basin is situated in the wet zone of the country which experiences high rainfall during the northwest monsoon (average rainfall is 2,217 mm annually and subject to flooding). The mean monthly temperature is on average 27.20C. Maduganga is generally shallow, with a maximum depth of 2.5 m in most places (the deepest point is 3 m and the shallowest is 1.25 m). Tidal influence is small with a maximum of 10 cm. The temperature of the surface water is within the range of 30.1-33.70C. The pH range in Maduganga is between 6.95 and 8.98. The level of salinity depends on the tides, inflow of freshwater via different streams and whether the lagoon mouth is open or closed. Near the mouth of the estuary, the salinity levels vary between 6.7 – 20.8 ppt and gradually decrease with distance from the mouth. The estuary is connected to the sea by a narrow canal and the mouth of the estuary is often blocked by a naturally formed sand bar. It receives water from three major streams; Boralessa Ela, Heen Ela and Magala Ela.

Monday, August 23, 2010

Cruising down Madu Ganga

Cruising down Madu Ganga
Struck by wanderlust, in March this year I explored the Madu Ganga (off Balapitiya) and its enchanting islets. My base was Kurunduwatta, a mile from Gintota, where I was hosted by my old friend-Lakshman Edirisinghe (Surveyor and Court Commissioner) and his charming wife, Lalitha. Lakshman's friend, Justin de Silva from Unawatuna (also a Surveyor and Court Commissioner), took us on our expedition in his car.

From Galle Road, near the Pategamgoda junction, we took a road going past the railway station and came upon the serene waters of the Madu Ganga nestling amidst the mangroves.


A concrete bridge, 1200 feet long (used by push bikes, motorcycles, hand-tractors and three wheelers) spanned the river at Talduwa connecting Gonduwa and Maduwa.

At the Talduwa boatyard we met Mr. H. Gunadasa de Silva of Maduwa who was to accompany us on our trip. A social worker and environmentalist, he is the founder President of the Saviya Development Foundation of Balapitiya.


This Galle-based NGO has undertaken a mangrove rehabilitation project in Madu Ganga and works with the Central Environmental Authority and the International Union for the Conservation of Nature (IUCN).

History and legend
The Madu Ganga is rich in history and legend and many were the fascinating stories Mr. de Silva told us during our trip. What is today known as Madu Ganga was in years past called Welitota.


It is said that the Madu Ganga had 64 islets but only 23 are to be found today. The largest of these was called Maha Duwa which is currently Maduwa.


Many are the references to Welitota in verse and prose. The epic Sinhala-Sandeshas (message poems) such as the 'Tissara Sandeshaya' (lines 67-68), 'Gira Sandeshaya' (lines 109-110)and 'Paravi Sandeshaya' (77th line) of the Dambadeniya period of King Parakrama Bahu II (13th century A.D.) all extol its beauty.
 

What we know as Balapitiya and its environs up to Thotagamuwa were known as Welitota. The other ancient landmark is the Welitota Ambalama which is mentioned in the 'Gira Sandeshaya' and 'Sidath Sangarawa'. It was considered a seat of Buddhist philosophy, so much so that monks from Burma and Siam are said to have visited it.

Army garrison
There is also an account of a brave and chivalrous prime minister called Deva Pathiraja in the reign of king Parakrama Bahu II (Dambadeniya 13th century A.D.) who by reinforcing an army garrison around Welitota was able to repel foreign invasions.


As this place was reinforced by an army, (bala senavak), it came to be known as Balapitiya (a plain reinforced by an army). Interestingly in ancient times the Madu Ganga was known as the Veli Ganga (sandy river).

Islets of lustre
As we continued our cruise, we came upon several islets, some large, others small. Mr. Gunadasa de Silva pointed out 'Digaduwa','Periyaduwa', a large, lush stretch of land, second in size only to 'Kothduwa'.


Poet Ananda Rajakaruna extolling the attractions of Madu Ganga and her beautiful islets wrote thus:


" Nil Mal Bisau diya kelina Madu gange
Dupath hethathara maleka Menik wage,
Atharin pathara then thenwala Ivure dige,
Dagab Pelen Athivunu Lassanak Age."


"Queens like blue-hued flowers bathe and frolic in Madu ganga,
The 64 islets glitter like a necklace studded with gems,
Here and there on the fringes of her bank,
Graces a line of dagabas adding lustre and beauty."


Today, of the 64 islets the poet mentions only 23 remain. Among them are 'Maduwa', 'Nahaduwa', 'Vadaduwa', 'Pathamulla', 'Galmaduwa', 'Thihaduwa', 'Katuduwa', 'Gonaduwa', 'Miraladuwa', 'Appaladuwa', 'Periya'/Digaduwa', 'Marakkaladuwa', 'Naiduwa', 'Dimaduwa', 'Sathapaheduwa', 'Waladuwa' and 'Kothduwa'.


Going past a tiny, wooded isle called Sathapaheduwa, we saw a tiny shrine dedicated to God Kataragama. The name Sathapaheduwa is apparently a reference to the island's size which is likened to a five-cent coin. Each islet's name, we were told, has its own legend connected to it.


The Kadapawunaduwa, for instance, was once part of a larger island, while another isle that was once infested with snakes is called Naiduwa (Isle of Snakes). During World War II (1939-45), a German prisoner had lived here and is said to have collected many species of poisonous snakes for research he was conducting in the extraction of their venom. The poison was kept in sealed bottles and later sent abroad.


Boer prisoner ?
Dr. R.L. Brohier in his book "Seeing Ceylon" mentions the Boer prisoners of World War I. They were kept in Jaffna and Hambantota as they refused to sign the oath of allegiance to the British monarch. Among them was Henry Engelbrecht who opted to live out his life in Hambantota. He was later made the first Game Ranger of the Yala National Park, then known as the Yala Sportmen's Reserve.


Engelbrecht died in Hambantota and his remains were interred in the Hambantota cemetery by the seashore. Dr. Brohier mentions that some of the Boer prisoners were given asylum in Uragasmanhandiya off Elpitiya. Uragasmanhandiya lies close to the cluster of islands of the Madu Ganga near Bagula Ela. Could it be that Naiduwa's German prisoner was one of those Boers?


We also visited 'Gonaduwa', the isle where once sambar roamed. Its vegetation is dense and we saw several trees of medicinal value such as the Rukaththana (Astonia schoaris). Mr. Gunadasa said that over 50 years ago he had come across a kebellawa (ant-eater - Pangolin) here. The island is also the abode of the jungle cat - walbalala, he said.


Our next stop was the wooded isle of 'Polathuduwa' which was once a park and herbarium. From there we saw 'Meemalaguduwa' -Buffaloe island and 'Galmaduwa'.


Madu Ganga islets as mangrove nurseries
In earlier years Madu Ganga and its islets were known for their mangroves, but these are now increasingly under threat. The exploitation of the Kadola Groves (Rhizophora apiculata) is one of the reasons for this decline. The bark is removed to obtain a dye and then the tree withers away. The dead trees are collected by villagers for use as fuelwood, charcoal and even fodder.


In view of the alarming decline in mangrove habitats, the Central Environmental Authority (CEA), the Department of Forests, the International Union for the Conservation of Nature (IUCN) and the Government of Netherlands have been taking steps to conserve not only the threatened areas of the Madu Ganga but also those in Kalutara, Galle, Gampaha and Puttalam.


Kirala trees (Sonneratia caseolaris), also abound in the mangrove habitats. Their juicy fruit can be eaten raw or made into a delicious, nutritious beverage. The other mangrove species thriving there are the Karan Koku - (Acrostichum aureum) which can be cooked as a curry or mallun.


At Digaduwa (Long Island), we were able to identify several herbal plants. Our guide Mr. Gunadasa de Silva showed us Agamul Nethiwel (Custuda) which he said is used in native medicine for the treatment of arthritis.


We came across another valuable herbal plant Kothala Hibatuvel (Salcia reticulata), the roots of which are used in ayurvedic medicine as a cure for diabetes. Another common plant that thrives along the fringes of the Madu Ganga and its islets is Wal Beli. Its flowers are yellow and bear tiny fruits, which however, are not edible. Still another rare tree we were shown was called Rath Milla which bears tiny but alluring red flowers. Its botanical name is 'Lumnitzera Litterea'.


Also on the banks of the Madu Ganga and its islets are a few groves of Gin Pol (Nypa fruiticans) which is a mangrove species, with leaves in the shape of the coconut palm. Its fronds are used for thatching roofs. In the days of yore, the banks of the Gin Ganga were filled with groves of Gin Pol. The name 'Gintota' was apparently derived from these Gin Pol trees that lined the river bank.


Rehabilitation project
The Saviya Development Foundation of Balapitiya, Galle under its mangrove rehabilitation project launched last year seeks to establish mangrove nurseries, re-plant the decaying Kadol trees and ensure their growth.


Re-planting has since been completed at nine sites along the Madu Ganga and its islets covering a 25-km strip on both river banks. One can only hope the project is successful in conserving the mangroves that are so much a part of the Madu Ganga.


Mangroves apart, the most alluring aquatic plants that greeted us on our river journey were the beautiful manel and olu - of varied hues. The rathu manel, nil manel and sudu olu were in full bloom and carpets of these flowers created an aura of a fairyland as the river wound its way through the mangroves. The nil manel is our national flower. The nelum, olu and manel belong to the species of Nelumbium speciosum, Nymphae Lotus, and Nymphae stellat a respectively. All these species are used in ayurvedic medicine for ailments like gonorrhoea and for bowel haemorrhage. The leaves, flowers and yams are all used.


By Gamini G. Punchihewa
Sunday Times ,7th May 2000

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