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Chaliyar River is the fourth longest river in
Kerala Kerala ( ; ) is a state on the Malabar Coast of India. It was formed on 1 November 1956, following the passage of the States Reorganisation Act, by combining Malayalam-speaking regions of the erstwhile regions of Cochin, Malabar, South ...
at 169 km in length. The Chaliyar is also known as Chulika River, Nilambur River or Beypore River as it nears the sea.
Pothukal Pothukallu (Pothukal) is located between Palunda and Munderi (9.0 km from Palunda in the Nilambur Taluk of Malappuram District). Pothukallu is well known for its greenery, hospitality of the natives, and availability of all basic amenities ...
,
Chungathara Chungathara is a village panchayat in Nilambur Taluk in Malappuram district, Kerala, India. It is one of the smallest gramapnachayat in Kerala. It is surrounded by Western Ghats. Geography Two rivers, Chaliyar and Punnappuzha, pass throug ...
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Nilambur Nilambur is a major town, a municipality and a Taluk in the Malappuram district of the Indian state of Kerala. It is located close to the Nilgiris range of the Western Ghats on the banks of the Chaliyar River. This place is also known as 'Teak ...
,
Mampad Mampad is a growing town in Malappuram district, Kerala, India. located about 08 km east of Nilambur city. Nearby places include Edavanna, Areacode, Manjeri, Wandoor and Pandikkad. It is under the Wandoor Assembly Constituency. Kozhik ...
,
Edavanna Edavanna (എടവണ്ണ ) is a town situated in Kerala, near Manjeri Town South India. The town is situated on Calicut–Nilambur– Gudalur state highway and near the banks of the Chaliyar River. The Koyilandy A Survey of Kerala Hist ...
,
Kavanoor Kavanoor is a Town near Areacode in Malappuram district in the Indian state of Kerala. Name The name of the town is spelled in English either Kavanoor or Kavanur or even Kavannur. Kavanur is the first high tech village office in Kerala.The ori ...
, Perakamanna,
Areekode Areekode is a town on the banks of the Chaliyar River in Areekode Grama Panchayat in Malappuram district India. Areekode was part of the Malabar district in British India. It is a town on the banks of Chaliyar River with an area of 7.25 squa ...
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Kizhuparamba Kizhuparamba or Keezhuparamba is a village and Panchayath on the northern boundary of Malappuram District In Kerala State of India. Kizhuparamba is situated on the banks of the Chaliyar river and in the border of Malappuram and Kozhikode dist ...
,
Elamaram Elamaram is a village in the Indian state of Kerala. It is situated near Edavannappara in Malappuram District of Kerala. This village is very scenic as it is on the bank of Chaliyar. There is a ferry service here that can take you to the ...
, Cheekkode,
Vazhakkad Vazhakkad is a village located on the banks of River Chaliyar Kondotty Taluk, Malappuram District, State of Kerala, India. East and some north part of Vazhakkad bordering with River Chaliyar, South Cheekode and Pulikkal Panchayats and West Vaz ...
,
Vazhayur Vazhayur is a census town in Malappuram in the state of Kerala, India. The Vazhayur Census Town has population of 36,909 of which 18,163 are males while 18,746 are females as per report released by Census India 2011. The 2018 Malayalam film ...
,
Cheruvadi Cheruvadi is a village in the Kozhikode district of Kerala. It is located 24 kilometres east of Kozhikode. Climate Cheruvadi has a humid and hot climate extending from March to May. The rain starts from June, lasting up to October. The North East ...
,
Edavannappara Edavannappara is a town in the Indian state of Kerala. Edavannappara town is 26 km away from Kozhikode city and 33km away from Malappuram. The towns in Malappuram district like Kondotty, Areekode, Calicut Airport, 19 km) (Nilambur ...
,
Mavoor Mavoor is a town situated in Kozhikode district in Kerala, India. It is 19 km away from Kozhikode city. Etymology The former name of Mavur was Pulpparambu, or "hayfields" in Malayalam, as grass for thatching houses was stored in ...
,
Peruvayal Peruvayal is the largest village in Kozhikode district in the Indian state of Kerala. This village is surrounded by Panchayaths of Mavoor, Kunnamangalam, Olavanna and Kozhikode corporation. The Chaliyar river forms one of the borders of Peruva ...
,
Feroke Feroke (), is a Municipality and a part of Kozhikode metropolitan area under Kozhikode Development Authority (K.D.A) in the Kozhikode district of the Indian state of Kerala. Feroke municipality shares the border with Kozhikode corporation, Ra ...
and
Beypore Beypore or Beypur (formerly Beypoor) is an ancient port town and a locality town in Kozhikode district in the state of Kerala, India. It is located opposite to Chaliyam, the estuary where the river Chaliyar empties into Arabian Sea. Beypore is p ...
are some of the towns/villages situated along the banks of Chaliyar. It mainly flows through
Malappuram district Malappuram (), is one of the List of districts of Kerala, 14 districts in the States and union territories of India, Indian state of Kerala, with a coastline of . It is the most populous district of Kerala, which is home to around 13% of the to ...
. Its tributaries flow through both the districts of
Malappuram Malappuram (also Malapuram) () is a city in the Indian state of Kerala, spread over an area of including the surrounding suburban areas. The first municipality in the district formed in 1970, Malappuram serves as the administrative headquarter ...
and
Kozhikode Kozhikode (), also known in English as Calicut, is a city along the Malabar Coast in the state of Kerala in India. It has a corporation limit population of 609,224 and a metropolitan population of more than 2 million, making it the second la ...
. The bank of river Chaliyar at Nilambur region is also known for natural
Gold Gold is a chemical element with the symbol Au (from la, aurum) and atomic number 79. This makes it one of the higher atomic number elements that occur naturally. It is a bright, slightly orange-yellow, dense, soft, malleable, and ductile met ...
fields. Explorations done at the valley of the river Chaliyar in Nilambur has shown reserves of the order of 2.5 million cubic meters of placers with 0.1 gram per cubic meter of gold. It originates at Ilambaleri hills of
Nilgiri Mountains The Nilgiri Mountains form part of the Western Ghats in northwestern Tamil Nadu, Southern Karnataka, and eastern Kerala in India. They are located at the trijunction of three states and connect the Western Ghats with the Eastern Ghats. At le ...
in
Nilgiris district The Nilgiris district () is one of the 38 districts in the southern Indian state of Tamil Nadu. Nilgiri ( en, Blue Mountains) is the name given to a range of mountains spread across the borders among the states of Tamil Nadu, Karnataka and Ker ...
(
Ooty Ooty (), officially known as Udhagamandalam (also known as Ootacamund (); abbreviated as Udhagai), is a city and a municipality in the Nilgiris district of the South Indian state of Tamil Nadu. It is located north west of Coimbatore and so ...
district), which is also near
Wayanad Wayanad () is a district in the north-east of Indian state Kerala with administrative headquarters at the municipality of Kalpetta. It is the only plateau in Kerala. The Wayanad Plateau forms a continuation of the Mysore Plateau, the southern ...
-
Malappuram Malappuram (also Malapuram) () is a city in the Indian state of Kerala, spread over an area of including the surrounding suburban areas. The first municipality in the district formed in 1970, Malappuram serves as the administrative headquarter ...
district border. It flows mainly through the erstwhile region of
Eranad Eranad also known as Ernad refers to the erstwhile province in the midland area of Malabar, consisting of Malappuram and nearby regions such as Anakkayam, Manjeri, Kondotty, Nilambur, etc. Currently Eranad Taluk is a Taluk in Malappuram distric ...
(present-day
Malappuram district Malappuram (), is one of the List of districts of Kerala, 14 districts in the States and union territories of India, Indian state of Kerala, with a coastline of . It is the most populous district of Kerala, which is home to around 13% of the to ...
), and finally empties into the
Arabian Sea The Arabian Sea ( ar, اَلْبَحرْ ٱلْعَرَبِيُّ, Al-Bahr al-ˁArabī) is a region of the northern Indian Ocean bounded on the north by Pakistan, Iran and the Gulf of Oman, on the west by the Gulf of Aden, Guardafui Channel ...
at
Beypore Beypore or Beypur (formerly Beypoor) is an ancient port town and a locality town in Kozhikode district in the state of Kerala, India. It is located opposite to Chaliyam, the estuary where the river Chaliyar empties into Arabian Sea. Beypore is p ...
port, opposite to
Chaliyam Chaliyam is a village situated at the estuary of Chaliyar (River Beypore) in Kozhikode district of Kerala, India. Chaliyam forms an island, bounded by the Chaliyar in the north, and River Kadalundi in south, and the Conolly Canal in the east. ...
harbour.


Name

The river has three names - Chaliyar, Nilambur River, and Beypore puzha, of which the first one is more popular. The river meets the
Lakshadweep Sea The Laccadive Sea or Lakshadweep Sea is a body of water bordering India (including its Lakshadweep islands), the Maldives, and Sri Lanka. It is located to the southwest of Karnataka, to the west of Kerala and to the south of Tamil Nadu. This war ...
at an 'azhi' (
estuary An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime environment ...
), the southern part of which is known as
Chaliyam Chaliyam is a village situated at the estuary of Chaliyar (River Beypore) in Kozhikode district of Kerala, India. Chaliyam forms an island, bounded by the Chaliyar in the north, and River Kadalundi in south, and the Conolly Canal in the east. ...
and northern part as
Beypore Beypore or Beypur (formerly Beypoor) is an ancient port town and a locality town in Kozhikode district in the state of Kerala, India. It is located opposite to Chaliyam, the estuary where the river Chaliyar empties into Arabian Sea. Beypore is p ...
. Unlike many other rivers in Kerala, Chaliyar does not dry up during the drought season in March and April. Chaliyar is also the name of a place and a
Grama panchayat Gram Panchayat () is a basic village-governing institute in Indian villages. It is a democratic structure at the grass-roots level in India. It is a political institute, acting as cabinet of the village. The Gram Sabha work as the general bod ...
in
Nilambur Nilambur is a major town, a municipality and a Taluk in the Malappuram district of the Indian state of Kerala. It is located close to the Nilgiris range of the Western Ghats on the banks of the Chaliyar River. This place is also known as 'Teak ...
Taluk A tehsil (, also known as tahsil, taluka, or taluk) is a local unit of administrative division in some countries of South Asia. It is a subdistrict of the area within a district including the designated populated place that serves as its administr ...
, which is located near the
Nilambur Nilambur is a major town, a municipality and a Taluk in the Malappuram district of the Indian state of Kerala. It is located close to the Nilgiris range of the Western Ghats on the banks of the Chaliyar River. This place is also known as 'Teak ...
Municipality, where Conolly's plot, the oldest manmade teak plantation in the world is located.


Course

The Chaliyar originates in the Western Ghats range at Ilambaleri hills in the ranges of
Nilgiri Mountains The Nilgiri Mountains form part of the Western Ghats in northwestern Tamil Nadu, Southern Karnataka, and eastern Kerala in India. They are located at the trijunction of three states and connect the Western Ghats with the Eastern Ghats. At le ...
of Western Ghats, which is also near
Wayanad Wayanad () is a district in the north-east of Indian state Kerala with administrative headquarters at the municipality of Kalpetta. It is the only plateau in Kerala. The Wayanad Plateau forms a continuation of the Mysore Plateau, the southern ...
-
Malappuram Malappuram (also Malapuram) () is a city in the Indian state of Kerala, spread over an area of including the surrounding suburban areas. The first municipality in the district formed in 1970, Malappuram serves as the administrative headquarter ...
district border. Chaliyar flows through
Malappuram District Malappuram (), is one of the List of districts of Kerala, 14 districts in the States and union territories of India, Indian state of Kerala, with a coastline of . It is the most populous district of Kerala, which is home to around 13% of the to ...
for most of its length and then for around 17 km it forms the boundary between
Malappuram District Malappuram (), is one of the List of districts of Kerala, 14 districts in the States and union territories of India, Indian state of Kerala, with a coastline of . It is the most populous district of Kerala, which is home to around 13% of the to ...
and
Kozhikode District Kozhikode (), or Calicut district, is one of the 14 districts in the Indian state of Kerala, along its Southwestern Malabar Coast. The city of Kozhikode, also known as Calicut, is the district headquarters. The district is 67.15% urbanised. ...
before entering the city of
Kozhikode Kozhikode (), also known in English as Calicut, is a city along the Malabar Coast in the state of Kerala in India. It has a corporation limit population of 609,224 and a metropolitan population of more than 2 million, making it the second la ...
for its final 10 km journey and finally empties into the
Lakshadweep Sea The Laccadive Sea or Lakshadweep Sea is a body of water bordering India (including its Lakshadweep islands), the Maldives, and Sri Lanka. It is located to the southwest of Karnataka, to the west of Kerala and to the south of Tamil Nadu. This war ...
at
Beypore Beypore or Beypur (formerly Beypoor) is an ancient port town and a locality town in Kozhikode district in the state of Kerala, India. It is located opposite to Chaliyam, the estuary where the river Chaliyar empties into Arabian Sea. Beypore is p ...
. Six major streams Chaliyarpuzha, Punnapuzha, Kanjirapuzha, Karimpuzha, Iruvahnipuzha and Thottumukkampuzha constitute the Chaliyar River drainage system. Other important tributaries are Kurumanpuzha, Pandipuzha, Maradipuzha, Kuthirapuzha and Karakkodupuzha. Most of these rivers have their origin in the
Nilgiri hills The Nilgiri Mountains form part of the Western Ghats in northwestern Tamil Nadu, Southern Karnataka, and eastern Kerala in India. They are located at the trijunction of three states and connect the Western Ghats with the Eastern Ghats. At le ...
in the east and Wayanad hills in the north, where they form a number of rapids and
waterfalls A waterfall is a point in a river or stream where water flows over a vertical drop or a series of steep drops. Waterfalls also occur where meltwater drops over the edge of a tabular iceberg or ice shelf. Waterfalls can be formed in several wa ...
. Near the origin of river are the
Meenmutty Falls Meenmutty Falls may refer to: * Meenmutty Falls, Thiruvananthapuram, a waterfall in Thiruvananthapuram district in the Indian state of Kerala *Meenmutty Falls, Wayanad Meenmutty Falls is located 29 km from Kalpetta in Wayanad District in ...
at coordinates by
Vaduvanchal Vaduvanchal is a small town in Wayanad district in the state of Kerala, India. It is situated in the Kozhikode-Ooty road. The town is part of the Muppainad Panchayat. Tourism The region is full of plantations, primarily tea, coffee and rubbe ...
,
Wayanad Wayanad () is a district in the north-east of Indian state Kerala with administrative headquarters at the municipality of Kalpetta. It is the only plateau in Kerala. The Wayanad Plateau forms a continuation of the Mysore Plateau, the southern ...


Economy

During late 19th century and early 20th century, the Chaliyar was extensively used as a waterway for carrying
timber Lumber is wood that has been processed into dimensional lumber, including beams and planks or boards, a stage in the process of wood production. Lumber is mainly used for construction framing, as well as finishing (floors, wall panels, wi ...
from the forest areas in and around
Nilambur Nilambur is a major town, a municipality and a Taluk in the Malappuram district of the Indian state of Kerala. It is located close to the Nilgiris range of the Western Ghats on the banks of the Chaliyar River. This place is also known as 'Teak ...
to the various mills in Kallai of
Calicut Kozhikode (), also known in English as Calicut, is a city along the Malabar Coast in the state of Kerala in India. It has a corporation limit population of 609,224 and a metropolitan population of more than 2 million, making it the second la ...
city.
Rafts A raft is any flat structure for support or transportation over water. It is usually of basic design, characterized by the absence of a hull. Rafts are usually kept afloat by using any combination of buoyant materials such as wood, sealed barrel ...
made of logs were taken downstream during the
monsoon A monsoon () is traditionally a seasonal reversing wind accompanied by corresponding changes in precipitation but is now used to describe seasonal changes in atmospheric circulation and precipitation associated with annual latitudinal oscil ...
season to Kallayi, where these were sawn to size in the
timber Lumber is wood that has been processed into dimensional lumber, including beams and planks or boards, a stage in the process of wood production. Lumber is mainly used for construction framing, as well as finishing (floors, wall panels, wi ...
mills dotting the banks of the river. Kallai was during this period one of the most important centers in the world for timber business. The place was famous for wood of superlative strength and durability like
teak Teak (''Tectona grandis'') is a tropical hardwood tree species in the family Lamiaceae. It is a large, deciduous tree that occurs in mixed hardwood forests. ''Tectona grandis'' has small, fragrant white flowers arranged in dense clusters (panicl ...
,
rosewood Rosewood refers to any of a number of richly hued timbers, often brownish with darker veining, but found in many different hues. True rosewoods All genuine rosewoods belong to the genus ''Dalbergia''. The pre-eminent rosewood appreciated in ...
, etc. Towards the second half of the 20th century, the activity came down drastically as tree felling was banned or strictly controlled with a view to stop deforestation. Many mills still operate in Kallai, though with far less output. Many have closed down.


Ecology

Chaliyar River was in the news a few years ago because of the ecological damage caused by a
pulp Pulp may refer to: * Pulp (fruit), the inner flesh of fruit Engineering * Dissolving pulp, highly purified cellulose used in fibre and film manufacture * Pulp (paper), the fibrous material used to make paper * Molded pulp, a packaging material * ...
factory at
Mavoor Mavoor is a town situated in Kozhikode district in Kerala, India. It is 19 km away from Kozhikode city. Etymology The former name of Mavur was Pulpparambu, or "hayfields" in Malayalam, as grass for thatching houses was stored in ...
, that released effluents into the river and affected the marine life. This factory has since closed down. K. A. Rahman led the agitation for cleanup of the river, and inspired the formation of an anti-pollution committee, Paristhithi Samrakshana Samithi, in 1999.


Tributaries

*
Cherupuzha (Mavoor) Cherupuzha is one of the tributaries of the Chaliyar River. It originates from the foothills of the Thamarassery churam as three separate rivulets. Iruthullippuzha (coming from Manalvayal) and Kadungampuzha (from Adivaram) merge near Kaithappoy ...
**Engappuzha **Iruthullippuzha **Kadungampuzha *
Iruvanjippuzha Iruvazhanjippuzha, or Iruvanjipuzha, is a major tributary of River Chaliyar and joining to Chaliyar at Koolimadu near Cheruvadi. Its major tributary is Chalippuzha, which joins with it about 3 km north of Thiruvambady town. Other tributaries ...
**Pulingappuzha **
Chalippuzha Chalipuzha River (ചാലിപ്പുഴ) is a tributary of Iruvanjippuzha which joins with the Chaliyar River Chaliyar River is the fourth longest river in Kerala at 169 km in length. The Chaliyar is also known as Chulika River, N ...
**Muthappanpuzha * Thottumukkampuzha *
Kuthirappuzha Kuthirappuzha is a tributary of Chaliyar in the Kerala state of India. The river joins Chaliyar at Vadapuram (behind Kerala state wood industries limited) near Nilambur. Kuthirappuzha is originating from forests south-west of Upper Bhavani reserv ...
**
Kottappuzha Kottappuzha is a tributary of Kuthirappuzha which is a tributary of Chaliyar river in Kerala, India. Kottappuzha originates from the western slopes of Upper Bhavani reservoir in Nilgiris district The Nilgiris district () is one of the 38 d ...
* Kuruvanpuzha * Kanjirappuzha * Karimpuzha ** Cherupuzha (Karulai) **
Punnappuzha Punnappuzha (Malayalam:പുന്നപ്പുഴ) is a tributary of Karimpuzha, which is the biggest tributary of the Chaliyar river in Kerala, India. Punnappuzha is also known as Pandiyar (പാണ്ടിയാര്‍) when it flows th ...
or Pandiyar *** Maruthappuzha or Kalakkanpuzha **** Karakkodan puzha *
Pandippuzha Pandippuzha (പാണ്ടിപ്പുഴ) is a tributary of Chaliyar. It is a small river originating from the forests north-west of Thannikkadavu. The river flows through Kodalippoyil to Edakkara and Chungathara Chungathara is a vill ...
* Neerppuzha * In addition to these rivers some creeks also join Chaliyar from Neelithode, Poonkudi, Vadasseri,
Edavanna Edavanna (എടവണ്ണ ) is a town situated in Kerala, near Manjeri Town South India. The town is situated on Calicut–Nilambur– Gudalur state highway and near the banks of the Chaliyar River. The Koyilandy A Survey of Kerala Hist ...
, Kunduthodu and
Mampad Mampad is a growing town in Malappuram district, Kerala, India. located about 08 km east of Nilambur city. Nearby places include Edavanna, Areacode, Manjeri, Wandoor and Pandikkad. It is under the Wandoor Assembly Constituency. Kozhik ...
.


Tourism

] Elamaram is a village in the Indian state of Kerala. It is situated near
Edavannappara Edavannappara is a town in the Indian state of Kerala. Edavannappara town is 26 km away from Kozhikode city and 33km away from Malappuram. The towns in Malappuram district like Kondotty, Areekode, Calicut Airport, 19 km) (Nilambur ...
in
Malappuram Malappuram (also Malapuram) () is a city in the Indian state of Kerala, spread over an area of including the surrounding suburban areas. The first municipality in the district formed in 1970, Malappuram serves as the administrative headquarter ...
District of
Kerala Kerala ( ; ) is a state on the Malabar Coast of India. It was formed on 1 November 1956, following the passage of the States Reorganisation Act, by combining Malayalam-speaking regions of the erstwhile regions of Cochin, Malabar, South ...
. This village is very scenic as it is on the bank of Chaliyar. There is a ferry service here that can take you to the northern side of the Chaliyar river. The ticket is Rs.5.00 and the motor boat service is available every half an hour between 6.40 a.m. and 8.40 p.m. including Sundays.


Ghost Town

Across the river Chaliyar lies the abandoned Grasim Industries factory which once employed 2,000 employees. Environmental agitations in 1998 caused the closure of the factory and the entire village went bankrupt because of the sudden development and eleven people even committed suicide because of not being able to face unexpected poverty.


Pilgrimage

The Konnara Dargah is three kilometres away from
Elamaram Elamaram is a village in the Indian state of Kerala. It is situated near Edavannappara in Malappuram District of Kerala. This village is very scenic as it is on the bank of Chaliyar. There is a ferry service here that can take you to the ...
on the bank of the Chaliyar river. It is the holy resting place of a
Muslim saint A wali (''wali'' ar, وَلِيّ, '; plural , '), the Arabic word which has been variously translated "master", "authority", "custodian", "protector", is most commonly used by Muslims to indicate an Islamic saint, otherwise referred to by the ...
where hundreds of pilgrims visit regularly.


Nearby villages

* Irumooliparamba, Ponnempadam, Channayil Palliyali (Santhigram), Akode, Virippad, Korappadam, Mundumuzhi, Vazhakkad, Valillappuzha, Pancheeri, Elamaram, Mapram, Konnar, Vettathur, Cheruvadikavu, Neerad, Muthuvalloor, Moochikal, Mundakkulam, Muthuparamba, Vettukad, Omanoor, Ponnad, Iruppanthody Karatt Chola Kolambalam Edavannappara, Arappuzha,Cheruvannur.


See also

*
Chaliyam Chaliyam is a village situated at the estuary of Chaliyar (River Beypore) in Kozhikode district of Kerala, India. Chaliyam forms an island, bounded by the Chaliyar in the north, and River Kadalundi in south, and the Conolly Canal in the east. ...
*
Beypore Beypore or Beypur (formerly Beypoor) is an ancient port town and a locality town in Kozhikode district in the state of Kerala, India. It is located opposite to Chaliyam, the estuary where the river Chaliyar empties into Arabian Sea. Beypore is p ...
*
Feroke Feroke (), is a Municipality and a part of Kozhikode metropolitan area under Kozhikode Development Authority (K.D.A) in the Kozhikode district of the Indian state of Kerala. Feroke municipality shares the border with Kozhikode corporation, Ra ...
*
Kadalundi Bird Sanctuary The Kadalundi Bird Sanctuary lies in Vallikunnu Grama Panchayat of Malappuram district in Kerala, India. It spreads over a cluster of islands where the Kadalundipuzha River flows into the Arabian Sea. The Sanctuary hill is around 200 m above ...


References

*
The River Chaliyar, by M. P. Chandran
*
K A Rahman Kavungal Amakkode Abdurahman (K. A. Rahman) (born 1 January 1940 – 11 January 1999), popularly known as Adhrehyaka or simply Adreyi, was the founder leader of the Chaliyar agitation in Kerala, India. Personal life Adreyi was the third son of ...


External links


Chaliyar River and Mayladi Bridge NilamburNews report about the River after the pulp factory was closed.Life returns to Chaliyar river
{{Waters of Kerala Rivers of Kerala Rivers of the Western Ghats Rivers of Kozhikode district Rivers of Malappuram district Rivers of India