Studies on Chennai Drainage System, Rivers, Canals, Creeks, Estuaries, Lakes
Studies on Chennai Drainage System, Rivers, Canals, Creeks, Estuaries, Lakes is technical study material containing presentations by specialists from the National Institute of Ocean Technology, Chennai, and the Centre for Environmental Studies, Anna University, Chennai. It examines pollution in the Cooum and Adyar rivers and explores a tidal flushing network connecting Chennai waterways, but it does not introduce a land use rule, property restriction or approval requirement. The source does not identify an issuing government department, order number or date.
What the document covers
Studies on Chennai Drainage System, Rivers, Canals, Creeks, Estuaries, Lakes contains two technical presentations. Dr. K.M. Sivakholundu of the National Institute of Ocean Technology, Chennai, examines ways to improve flushing in the Cooum River. Dr. A. Navaneetha Gopalakrishnan of the Centre for Environmental Studies, Anna University, Chennai, presents the pollution status of the Adyar and Cooum rivers.
The source does not identify an issuing government department, government order number or date. It does not set out property controls, land classifications, development permissions or legal obligations for landowners.
Cooum flushing study
The study describes the Cooum as a former freshwater source that now receives untreated sewage and surplus water from 75 small tanks. Natural flushing is limited by low river discharge, a small tidal range, gentle terrain and sandbar formation at the river mouth.
The proposed engineering approach includes:
- Creating a waterway network involving the Cooum River, Adyar River, Buckingham Canal and the sea.
- Designing channels with sufficient cross section to allow tidal movement.
- Making minor alterations at the Cooum and Adyar river mouths.
- Enlarging the river mouths and using an assumed uniform trapezoidal channel section for modelling.
- Maintaining river mouth openings through a combination of groynes, dredging or sand bypassing.
The numerical simulation sought an average residual flow of 0.001 metres per second. At that modelled rate, replacement of the network's water mass would take about four months. For an assumed 10 kilometre network, approximately 0.7 million cubic metres of material would need to be removed, with an estimated network creation cost of about Rs. 30 crore based on assumed quantities and rates.
Pollution findings and practical concerns
The pollution presentation identifies industrial outfalls, commercial institutions, sewage treatment plants, pumping stations, sewers, storm water drains and slums as pollution sources. Testing covered physical and chemical conditions, nutrients, organic matter, major ions, microbiology, heavy metals and pesticides.
The flushing study warns that sending sewage towards the open sea could pollute the shoreline, including Marina beach. It identifies stopping untreated sewage inputs as the preferred permanent solution. Settlements and the elevated railway track along the network may also obstruct implementation.
Relevance to property owners
Studies on Chennai Drainage System, Rivers, Canals, Creeks, Estuaries, Lakes does not itself change property rights or impose building conditions. Its relevance is informational, particularly for readers interested in environmental conditions or possible engineering works near Chennai waterways.
This summary is generated from the source document to help you find what is relevant. The PDF above is authoritative. For advice on your own property, use LandLens One or speak to a qualified professional.
Common questions
Does this document change land use or building rules near the Cooum or Adyar rivers?
No land use change, building rule or property approval requirement is stated in the source. The document presents drainage, pollution and engineering studies.
What solution is proposed for improving the Cooum River?
The study proposes a connected network involving the Cooum River, Adyar River, Buckingham Canal and the sea, using regular tidal movement to improve flushing. It also proposes maintaining river mouth openings.
Would tidal flushing permanently solve the sewage problem?
The study says untreated sewage should be stopped as the permanent solution. Otherwise, flushing could merely transfer pollution from the river to the sea and shoreline.
Does the document identify obstacles to carrying out the proposed network?
Yes. It identifies river mouth closure caused by littoral drift, settlements and the elevated railway track along the network as possible implementation problems.
