DDA Announces Two-Month Timeline for Yamuna Floodplain Drone Survey
The Delhi Development Authority (DDA) has officially informed the National Green Tribunal (NGT) that it will complete a comprehensive drone survey of the Yamuna floodplain, known as the O zone, within approximately two months. This critical environmental initiative covers a vast area of 165 square kilometers, including buffer zones, and aims to document encroachments and land use in this ecologically sensitive region.
Scope and Significance of the O Zone Survey
The O zone encompasses the entire floodplain along a 22-kilometer stretch of the Yamuna River within Delhi. This area has been under intense scrutiny due to illegal constructions and environmental degradation. In a recent report dated April 20, DDA detailed that the boundary of the zone has been digitized based on approved planning documents, with additional khasra layer data provided by GSDL integrated into the digital mapping.
DDA has already reclaimed 7 acres of land through demolition drives conducted on April 16 and 17 at locations including Madanpur Khadar and Jhangola villages, as well as Revenue Estate-Indraprastha, all situated within the O zone. These actions highlight the authority's ongoing efforts to address unauthorized encroachments that threaten the river's health.
Background: NGT's Suo Motu Cognisance
The tribunal took suo motu cognisance of a Times of India report from 2024 titled "161 illegal colonies on O zone making river water toxic." This report exposed a grave issue: colonies housing approximately 2.3 lakh households are not connected to the sewer network, leading to direct contamination of the Yamuna River. The drone survey is part of the second phase of documenting the zone to better understand and mitigate these environmental hazards.
Drone Survey Operations and Timeline
Drone flying operations for the second phase commenced in the Green Zone on February 5. According to DDA, the Survey of India has estimated that with an average output of about 3.5 square kilometers per day per team, two teams will require around 18 additional working days to survey the remaining 122 square kilometers. This timeline is contingent upon obtaining necessary permissions, such as Air Traffic Control (ATC) clearances, and favorable weather conditions.
It is important to note that the Green and Red zones are integral components of the broader O zone. DDA has clarified that the two-month timeline specifically refers to the drone survey itself, with an additional month needed for post-processing work to analyze the collected data and generate actionable insights.
Enforcement and Monitoring Measures
To prevent further encroachments, DDA has implemented robust monitoring mechanisms. The authority has designated officers to ensure continuous surveillance of the O zone and has requested the Municipal Corporation of Delhi (MCD) to adopt similar vigilance. Additionally, DDA has reached out to land-owning agencies, including MCD and the Land and Development Office, urging them to remove encroachments on their respective properties.
In a proactive step, on April 10, DDA forwarded copies of high court orders to the Commissioner of Police. This communication directed all Station House Officers within the O zone to maintain strict vigilance against unauthorized constructions and encroachments, and to provide necessary assistance to DDA as required. These measures underscore a coordinated effort to safeguard the Yamuna floodplain from further degradation.
This drone survey represents a pivotal move in Delhi's environmental governance, aiming to restore the ecological balance of the Yamuna River while addressing long-standing issues of illegal settlements and pollution. The findings from this survey are expected to inform future policy decisions and enforcement actions to protect this vital natural resource.
