Noyyal River Restoration Project in Coimbatore Achieves Major Milestone
In a significant environmental initiative, the Water Resources Department (WRD) and the non-governmental organization Siruthuli have successfully restored a portion of the Noyyal River near Perur in Coimbatore, Tamil Nadu. This restoration project, which began in late March, has already seen more than 65-70% of the work completed, marking a crucial step in reviving the river after over a decade of neglect.
Comprehensive Restoration Efforts Underway
The restoration work focuses on a 1.8-kilometer stretch at Perur near Padithurai, where the Noyyal River enters Coimbatore. Historically, this area has been prone to pollution and shrinkage, leading to inadequate fresh water supply to the interconnected lakes. The project involves several key activities:
- Desilting of the riverbed to remove accumulated waste and silt.
- Restoring and strengthening the river bunds to their original dimensions.
- Planting trees along the bunds to enhance ecological stability.
According to C Chinnasamy, Chief Operating Officer of Siruthuli, approximately 10 tonnes of waste, including items discarded during rituals near local temples, have been removed during the desilting process. This cleanup has been instrumental in improving the river's health and functionality.
Remarkable Improvements in River Dimensions and Flow
The restoration has yielded impressive results in terms of the river's physical characteristics. Before the intervention, the width of the Noyyal River had shrunk to a mere 8-10 meters. Now, it has been restored to 30 meters, with plans to achieve the original width of 40 meters near the bridge. Similarly, the depth has increased from just one meter to 2.1 meters, significantly enhancing the river's capacity.
Chinnasamy highlighted the impact on water inflow, stating, "Before desilting, the river had only 18 million litres of inflow. After restoring its original size, it can now carry an additional 54 million litres of water, greatly boosting its ability to supply fresh water to the region." This increase is expected to alleviate water scarcity issues in the connected lakes and surrounding areas.
Future Plans for Sustainable Management
Looking ahead, the WRD has outlined several initiatives to ensure the long-term sustainability of the Noyyal River. A key component is the planting of 7,000 trees along the 1.8-kilometer bunds, which will help prevent erosion and improve biodiversity. Additionally, the department is addressing pollution sources by focusing on two inlet points that discharge wastewater into the river—one with a flow of 1.5 million litres per day (MLD) and another with 1.1 MLD.
To tackle this issue, the WRD is conducting a feasibility study on creating two lagoons near these inlet points. These lagoons would utilize biological enzymes to treat wastewater effectively. Plans are also being considered to plant species like Canna indica (commonly known as Kalvalai) and vetiver on the lagoons. These plants are known for their ability to reduce nutrient levels and remove heavy metals, further enhancing water quality.
Timeline and Broader Implications
The entire restoration project is slated for completion before the arrival of the monsoon season, ensuring that the river is better prepared to handle seasonal rainfall and reduce flood risks. This effort not only revitalizes a critical water source but also sets a precedent for collaborative environmental conservation in urban areas.
By restoring the Noyyal River, the project aims to improve water security, reduce pollution, and enhance the ecological balance in Coimbatore. It serves as a model for how government agencies and NGOs can work together to address pressing environmental challenges, benefiting both the community and the natural ecosystem.
