As per the Delhi Master Plan 2021, the population of Delhi is projected to touch 23 million by 2021. Presently, half of the Capital is not connected with a sewerage system. The report states that the wastewater services in the next 20 years are likely to worsen. Considering the gravity of the issue, the DJB directed the team of consultants from AECOM and WAPCOS to carry out a detailed survey of the national capital and a present a feasibility report.
The team conducted extensive survey and captured data at 30 cm centre-to-centre to generate contour maps, and create a GIS integrated shape file with defined projections. The topographical survey was carried out using Leica TS02 and Topcon 220 total stations to prepare topographical maps with a scale of 1:2000 depicting constructed structures, drain property boundary lines, and roads and other details. Using this data a hydraulic sewerage networking model and concept layout plan was created using Bentley SewerGEMS sanitary software.
“The Master Plan envisages laying of sewer lines in a length of about 10,500 km, which is a lengthy process. Hence, the work is to be carried out in a phased manner, prioritising areas where sewer lines can be made functional, immediately after being laid, because of availability of outfall sewers and waste water treatment plants,” the spokesperson said.
With the implementation of SMP 2031, sewerage facilities will be extended in the unplanned areas including the rural, the resettlement and the unauthorised colonies. According to reports, the work of laying of sewer lines has already been completed in 135 unauthorised colonies and is in progress in 208 unauthorised colonies.
Source: Delhi Jal Board