Brief
Rural Development and Panchayat Raj Department & Rural Drinking Water Supply and Sanitation Department, Government of Karnataka, have planned to implement a Multi Village Drinking Water Supply Scheme to Thandavapura and other 31 Habitations in Nanjangud Taluk of Mysore district from Kabini river through Design, Build, Operate and Transfer (DBOT) Mode Under Jal Jeevan Mission.
About the Project
In a bid to improve water supply to Thanadavapura and 31 other villages within the Nanjangud Taluk of Mysore, a comprehensive project proposal has been put forth under the Jal Jeevan Mission. The project primarily involves the extraction and distribution of water from the Kabini River near Bokkalli. The site has been chosen due to its consistent water availability throughout the year, making it a reliable source.
Total projected water demand for the habitations in the project area is 3.58MLD for the ultimate year of 2055 and 3.42 MLD for the intermediate year of 2040. Annual Water requirement from River Kabini for the scheme is 0.046 TMC.
Project Proposal
The proposed headworks aim to draw the required quantity of raw water from a designated point in the Kabini River near Bokkalli. This source provides water consistently throughout the year, and water extraction can be carried out from below the riverbed level. The components planned for the headworks include an intake well, jack well, connecting pipes with an inspection chamber, an approach bridge, a transformer yard, and VT pumps.
The project encompasses various components such as intake wells, connecting pipes, a jack well with a pump house, raw water pumping machinery, raw water rising mains, a water treatment plant (WTP), raw and treated water storage tanks, a treated water pumping station, and Master Balancing Tanks/Reservoirs (MBT/MBR). Additionally, the proposal includes clear water gravity feeder mains from the proposed MBT/MBR to ZBR, as well as feeder mains from ZBR to existing and proposed ESRs/GLSRs in the project area.
A comprehensive rapid sand filter system, including all the necessary components for the water treatment plant in the Thandavapura area, has been suggested. The design of the Raw Water Rising Mains from the proposed Jackwell at the headworks location needs to accommodate the daily demand of the scheme. The raw water from the Jackwell is directly pumped to the aerator of the WTP.
The main raw water pumping system transfers 3.58 million liters per day (MLD) of water from the jackwell to the WTP area. The treated water capacity of 3.58 MLD from the WTPs will be pumped to the proposed Zonal Balancing Tanks (ZBTs), and from there, it will be conveyed by gravity to the Elevated Service Reservoirs (ESRs) located at strategic points via gravity mains. The water requirements for both intermediate and prospective periods have been calculated, and a tentative design has been developed to supply drinking water to the inlet of both existing and proposed ESRs.
The proposed Multiple Village Scheme (MVS) is designed to cover a total of 32 habitation areas. The project area has been divided into two zones. Treated water from the Pure Water Sump of the WTP can be directly pumped to ZBRs, and further distribution will take place to all Village Level ELSRs.
The treated water from the WTPs will be pumped to the strategically located proposed Zonal Balancing Reservoir Tanks (ZBTs). Similar to earlier stages, the water requirements for intermediate and prospective periods have been determined, and a tentative design has been prepared to supply drinking water to the inlet of the proposed Zonal Balancing Tanks (ZBTs).
The treated water stored in the ZBTs will be conveyed to both existing and proposed Overhead Tanks (OHTs) in all project habitations through a gravity feeder main network.
Automation for seamless management
Managing a vast surface water project with interconnected components can be challenging due to potential human errors and system inefficiencies. Under the Jal Jeevan Mission scheme automation tools will be deployed for the project.
- An advanced automation, SCADA, and control system will be implemented.
- This technology-driven approach minimizes manual intervention, reducing the risk of errors.
- The system ensures components work harmoniously, preventing issues like overflows and water leaks.
- Energy audits at key points promote energy efficiency.
- Flow meters monitor water movement, aiding in accurate water audits.
- Water quality audits at critical points maintain water safety.
- Benefits include enhanced efficiency, optimized resource usage, data-driven decisions, quality assurance, and equitable water distribution.
By adopting this approach, the bulk water supply scheme will operate seamlessly, providing reliable and consistent water distribution while minimizing operational shortcomings.
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