No proper outfall for drainage channels: DJB on Kirari flooding
DJB Attributes Kirari Waterlogging to External Factors in NGT Report
Bharatmorningnews.com – Delhi Jal Board has presented its defense before the National Green Tribunal regarding persistent waterlogging and wastewater stagnation in northwest Delhi’s Kirari region. According to the board’s submission, these issues stem from outside influences rather than deficiencies within their sewage infrastructure. The primary culprits identified include blocked natural drainage pathways and insufficient stormwater management facilities.
Decades of Unplanned Expansion
Rapid urbanization over many years has transformed Kirari into a region containing more than one hundred unauthorized settlements. These colonies lack adequate sewerage connections and stormwater systems. The single Kirari Suleman Nagar drain currently manages only a portion of the required capacity, leading to significant sewage overflow and water levels reaching knee depth during monsoon seasons.
Recent media coverage focusing on Sharma Colony brought the long-standing problem back into public attention. In January, the NGT initiated proceedings on its own motion following these reports and continues to examine the matter.
Technical Challenges and Solutions
A report dated August 11, reviewed by Hindustan Times, reveals that DJB installed a sewage network in Sharma Colony following proper hydraulic specifications. However, the system remains non-functional because a trunk sewer necessary for managing regional outflow has not yet been established.
A trunk sewer functions as a major conduit within the underground network, collecting wastewater from smaller collector and main sewers to transport high volumes of sewage.
The DJB sewage network is designed to handle the toilet waste,
The board attributed responsibility to the Delhi Development Authority for depositing landfill waste and inert materials into nearby low-lying zones without providing discharge arrangements.
Construction of drainage systems falls under the jurisdiction of the Irrigation and Flood Control Department and DSIIDC, while operation and maintenance responsibilities belong to the Municipal Corporation of Delhi. DJB clarified that waterlogging results from stormwater combined with surface runoff rather than sewage buildup.
Waterlogging is not attributable to sewage accumulation but it is due to accumulation but it is due to stormwater mixed with surface run-off.
Infrastructure Development Underway
The status report indicates that DDA is currently building large-capacity drains for stormwater disposal in the affected area. Additionally, DJB’s ongoing trunk sewer construction will eventually enable sewerage discharge to the Pratap Vihar wastewater pumping station, which has reached 98 percent completion.
Once connected, sewage from this location will undergo treatment at the Rohini sector 25 sewage treatment plant.
Under a Union government-supervised program, six infrastructure projects aim to reduce flooding in the region. These initiatives include side drains within colonies, a railway line drain, a DDA drain extending to the Supplementary drain and KSN drain, plus two drains running parallel to Rohtak Road.
Due to absence of the above infrastructure stormwater was flowing in the nearby low lying areas…Low lying areas have been filled by the DDA without making arrangements for disposal of the discharge; thus it has resulted in backflow, flooding and unhygienic condition,
The Delhi Development Authority had not provided a response to inquiries at the time of publication.
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