Saturday 21 September 2013

About Thenpennai River

The South Pennar River is known as Thenpennaiyaru in Tamil and Dakshina Pinakini in Kannada. It is also referred as Ponnaiyar .  The river originates from the South-Eastern side of the Chennakesava hills and the North-Western side of the Nandi Hills or Nandidurg  in the Chikkaballapur district of Karnataka state. It flows for a distance of about 85 kilometres within Karnataka, to the north of Bangalore.  Just before the interstate border, excess water from Bellandur and Vartur lakes in Bangalore flows into the river and then it flows towards south east and enters Tamil Nadu at a distance of 4 kilometres to the west of Pagalur (about 50 km north west of Bagalur village of Hosur Taluk in Krishnagirir District).  It flows 400 kilometres (km) from its point of origin before joining the Bay of Bengal at Cuddalore district of Tamilnadu.

Chief Tributaries:

En route, its chief tributaries are the Chinnar (Markanda nadhi), Vaniyar and Pambaru rivers.  It is the sole water source in Krishnagiri, Tiruvannamalai, Villupuram and Cuddalore districts.
The Chinnar (Markanda nadhi) flows due south from the Mysore Plateau through the valley of Tirtham and Veppanapalli and joins the South Pennar river.
The river Vaniyar originates and run completely in Shervaroyan Hills close to Yercaud in Tamil Nadu. It joins the Thenpennai River in Boongarrampatty Reserved Forest area.
The river Pambaru rises on the hill of Javadhu near Alangayam and from Thirupathur southwards it flows a course of remarkable straightness through Uthangarai and joins the South Pennar. 
The Gadilam River, which starts in eastern part of Thirukoilur Taluk of Villupuram district flows through Cuddalore Taluk. In Cuddalore Taluk, Malattar joins it on the right and then it flows into the Bay of Bengal at a point, just north of Cuddalore. The Thenpennai and the Gadilam are connected by a river course called "the Malattar", which serves to carry the surplus water from Thenpennai to Gadilam.

Benefitting from South Pennar:

The Thenpennai River covers 110 km in Karnataka, 140 km in Krishnagiri  and Dharmapuri, 35 km in Tiruvannamalai, 105 km in Villupuram and 40 km in Cuddalore districts. The river has a catchment area of 1,424 mi2. The river is dry for the most part of the year. Water flows during the monsoon season when it is fed by the southwest monsoon in catchment area and the northeast monsoon in Tamil Nadu. However this water flow raises the water table throughout the river basin and feeds numerous reservoirs/tanks.

The Thenpennai and its tributaries besides a number of lakes, tanks and ponds are supporting for irrigation and drinking water and other uses from its point of origin before joining the Bay of Bengal.
The  Thenpennai River is the main source for irrigating over 38,000 acres in Krishnagiri district; 6250 acres in Dharmapuri district; 17,980 acres in Tiruvannamalai district and 25000 acres in Villupuram district (The district largely depend on ground water, lakes and tanks for irrigation).  It is also the main source of drinking water to more than 100 villages along its route.

Key Problems/Issues:

Thenpennai River systems, especially those closer to human settlements and industrial developments suffer from acute levels of pollution. River that flow through densely populated areas including towns and housing areas are often polluted with solid wastes.
Soil erosion caused by land development in the surrounding areas and untreated waste discharges from nearby factories further contribute to the high pollution levels. These toxic wastes not only destroy aquatic life but also surrounding vegetation, flora and fauna due to its highly acidic levels.
Thenpennai River which gives drinking water to Krishnagiri, Tiruvannamalai, Cuddalore and part of Villupuram districts is on the verge of ruin owing to dumping of Industrial and medical wastes, plastics and city garbage indiscriminate letting of domestic sewage water into the river.
Industries around Bellandur lake in Karnataka and in Hosur areas releases effluents directly into the water body.
Fertilizers used by farmers of Karnataka as well as Tamilnadu have made things worse. Very high levels of phosphate in the water.
In Kaveripattinam town, a four-km sub-channel on the right side of the river is being used to let off sewage water from houses and commercial establishments on the river banks. In many places walls of this channel are broken and the sewage water flows directly into the river.
This river is now looted for its rich availability of sand. As a result of extensive sand mining along the river, water now reaches the wells without being purified. Its bacterial content is, therefore, very high.
Many of the open wells in the adjacent villages of river banks are dried because of uncertain rainfalls and drought; they are used as dumping pits.

The Government attempts alone are not enough to protect the river and its environment, the community participation in water management is essential.


14 comments:

  1. Very true sir. Bellandur and Varthur lakes and Ambur factory waste spoils the river. Feeling bad to see about the state of the thenpennai. How to save this river? More awareness should be created for the people to stop polluting. Only if people put forward the issues through meetings, governments of Karnataka and Tamilnadu will listen.

    - Yours,
    A person from Cauvery delta.

    ReplyDelete
    Replies
    1. Bangalorean untreated poop without treatment goose Bellandur and Varthur lake then it flows to Krishnagiri... This is used as drinking water in Tamilnadu

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  2. i also totally agree with the sand looting and pollution of water in the river. The river where i was drinking the water directly 20 yrs before has now become unfit to even bath or wash the face. We should fight hard to bring it back the original level and protect the natural resources

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  3. True sir, but the paining thing is that during my childhood I used to play in the river water in hoskote, bangalore rural. But due to the real estate development in the catchment areas of south pennar river, the tributaries of this river are blocked and because of this 2350 acres of water basin in hoskote is totally drain. Pls. Inform if their is any way to take this information to state or central government to clear the catchment area, so the water can easily flow into the river. Pls. guide me.

    ReplyDelete
  4. True sir, but the paining thing is that during my childhood I used to play in the river water in hoskote, bangalore rural. But due to the real estate development in the catchment areas of south pennar river, the tributaries of this river are blocked and because of this 2350 acres of water basin in hoskote is totally drain. Pls. Inform if their is any way to take this information to state or central government to clear the catchment area, so the water can easily flow into the river. Pls. guide me.

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  5. Stop polluting Thenpennai river ...
    Ask Karnataka & TN govt to take necessary steps to avoid pollution in this river.

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  6. Polluters & sand mafia are to be brought before the law & fitting punishment to be given. Simultaneously work on restoration should start to rejuvenate these GOD given water bodies.

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  7. my village is in the bank of this river. now it is a sand mine. today i hear village is inundated due to heavy rains. i hope the villagers save the village at least now

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  8. How to run this river any neighbour rivers form Kerala or Andhra or Karnataka to connect flooding over flow present immediately to solve and reduce tonnes of overflow pressure to save mankind 🌟 any project then pennai river dry,why can't utilise this god given opportunity

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  9. hi sir any one tell me thenpennai river survey number about land survey number....

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