Rivers of Goa for Goa PSC - GOA PCS Exam Notes

Rivers of Goa

Drainage systems

Drainage systems, also known as river systems, are the patterns formed by the streams, rivers, and lakes in a particular drainage basin. They are governed by the topography of the land, whether a particular region is dominated by hard or soft rocks, and the gradient of the land.

About Rivers of Goa and Drainage

Goa, twenty fifth state of the Indian Union, is small but picturesque state, famous all over the world as “The Tropical Paradise of Tourists”.
Ensconced on the slopes of Western Ghats which skirts its eastern boundary and lapped by the blue expanse of the Arabian Sea in the West, Goa admeasures an area of about 3,702 sqkm.
Goa Situated between Karnataka and Maharashtra.
Goa is bounded on the North by the Terekhol River, surrounded on the South and East by Karnataka while on the West is the Arabian sea.
This state is divided into two districts, North and South, administered from Panaji, the capital city and Margao, respectively
There are nine major rivers in Goa flowing from East (Western Ghat) to West (Arabian Sea) except Sal River.
Terekhol, Chapora, Baga, Mandovi, Zuari, Sal, Saleri, Talpona, Galgibag are the main nine rivers of Goa. Among these rivers Mandovi and Zuari drain 2553 Sq. Km, about 70% of the total geographical area of Goa.
Out of nine rivers, six originate and flow exclusively within the state boundaries and do not have any interstate implications.
However, river Terekhol and Chapora originate in Maharashtra state while Mandovi originates in Karnataka.
These rivers form an integral part of Goan life because of their portability, irrigation facilities, agriculture and coastal resources, transportation of mining ores, etc
Rivers of Goa are unique and are both tidal as well as Rainfed. In Goa, during monsoon, water within the watershed areas is drained out through the major rivers to the sea.
The rivers are influenced by the tidal influx upto the distance of 40Km inland towards upstream.
Salinity factor in the river varies sharply during monsoon and non-monsoon seasons and so does the physico-chemical quality of water in wells along the riverbanks.

*River Basin in Goa*	*Length within the state*	*Basin Area in Sq. Kms.*
Terekhol	26	71
Chapora	32	255
Baga	10	50
Mandovi	52	1580
Zuari	145	973
Sal	40	301
Saleri	11	149
Talpona	32	233
Galgibag	14	90
Total		3702 Sq. Kms.

Madovi and Zuari: Two most important Rivers of Goa

Goa’s Riverine landscape is dominated by Mandovi and Zuari rivers.
According to the recent findings of National Institute for Oceanography during the last glacial period, i.e. 20,000 years ago, both rivers, Mandovi and Zuari, flowed through the rocky terrain as a single river system before branching out separately.

Mandovi River

The Mandovi also called Mahadayi rises at an elevation of 600 m in the main Sahyadris above the Kelil Ghat in a Degao village of Belgaum district of Karnataka state, located on the western fringe of the Karnataka Plateau.
Flowing for 29 km through Uttar Kannada District of Karnataka State the river enters Goa State via Sattari Taluka of North Goa District.
River is flowing a length of 52 km within the Goa State it falls into Arabian Sea at the Marmagao Bay near Panjim.
Catchment of Mandovi River lies in Goa and partly in Karnataka making it an interstate river. Within Goa State the Mandovi River drains an area of 1,580 sq km covering about 42% area of the state.
In the upper reaches of the Sattari valley, this river is called the Mhadei (meaning Great Mother). After its confluence with the Khandepar river at Bembol (Bicholim) it is called Mandovi till it meets the Arabian Sea ahead of Panaji.
Mhadei River is an important tributary of Mandovi holds a great ecological significance for the state. About 85% of the area of Mhadei watershed is forest and is home for Mhadei Wildlife Sanctuary.
Mandovi River has the largest basin in Goa.

Zuari River

Zuari River is the longest river in the state and has second largest basin.
Zuari is believed to have been known in the earlier times as the Aghanashini, the destroyer of sin.
Zuari’s source water; lies entirely within the state, with the inter-state boundary almost following the water divide.
Referred to as a tidal river, Zuari originates in the Dighi Ghat of the Karnataka part of the Sahyadri Hills and after flowing a zigzag stretch of about 145 km joins the Arabian Sea at Mormugao – Dona Paula point.
Zuari basin extending from Netravali to Panjim covers an area of about 975 km2 and constitutes about 27 % of the total area of Goa.
The basin has forest area of 31.4% and hosts Netravali Wildlife Sanctuary.

Waters of Mandovi and Zuari are extensively used for drinking and agriculture purposes. Mandovi also serves as an important internal navigation route for commercial purpose. Panaji, the state capital and Old Goa, the former capital of Goa, are both situated on the left bank of the Mandovi.

Terekhol River

The Terekhol River is a river in western India. In its upper reaches it is known as the Banda River and in the lower reaches as the Terekhol.
It forms the boundary between Sindhudurg district of Maharashtra state and North Goa district of Goa state for some distance.
The Terekhol rises in the environs of the Manohargad in the Western Ghats and flows in a south-westerly direction to meet the Arabian Sea.
Terekhol fort is located on the northern bank of this river in the far north of Goa.
From Kerim one can cross the Terekhol River by ferry and then it is 2 km to the fort.

Chapora River

Chapora River is a river in northern Goa, India.
It runs westward into the Arabian sea at Chapora and demarcates the border between the North Goa talukas of Pernem and Bardez.
The river originates at Ramghat in the neighbouring state of Maharashtra enters Goa and flows into the Arabian Sea.
Vagator Beach, a tourist destination, is located at the estuary to the south, and to the north is the village of Morjim.
There is a bridge across Chapora from Morjim to Siolim.
In the 18th century, the river marked the boundary between Portuguese Goa and India

Sal River

The Sal River is a small river in Salcete, Goa, India.
The river opens near Margao and passes through the villages of Benaulim, Navelim, Varca, Orlim, Carmona, Dramapur, Chinchinim, Assolna, Cavelossim, Mobor and drains itself into the Arabian Sea at Betul.
Local residents of Benaulim have been complaining to the Government since 2008 about pollution and the dumping of garbage into the river and residents of Carmona have raised a Greenpeace petition to stop a “mega-housing project” which it is feared will add to the pollution.

Mapusa River

Mapusa River is a tributary of the River Mandovi in Goa, India.
The river originates from the jungles of Dumacem and Amthane, meanders eastward and then southward before it drains itself in the Mandovi River at place of Penha de France.
Mapusa River has separated Corjuem from mainland Aldona.
The river has since ancient times been used a popular waterway to transport agricultural products and spices.
The town of Mapusa is the largest town located on the banks of the Rivers of Goa.

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