proposed integrated complex for delhi judicial academy

Rapid Environmental Impact Assessment (REIA) Study for Proposed Integrated Complex for Delhi Judicial Academy,
National Law School, and National Institute for Mediation & Conciliation at Dwarka, New Delhi
• Day Time is from 6.00 am to 10.00 pm, Night time is 10.00 pm to 6.00 am
• Silence zone is defined as area up to 100 meters around premises of hospitals, educational
institutions and courts. Use of vehicle horns, loud speakers and bursting of crackers are
banned in these zones.
4.7 Water Environment
The study area, a part of South West District of Delhi, receives about 81.2% of the annual rainfall
during the monsoon months June to September. On an average, rain of 2.5 mm or more falls on
38.3 days in a year in this region of Delhi. The annual average rainfall is about 792.8 mm based on
22 years of data (Source: IMD).
4.7.1 Ground Water Hydrology
Delhi is situated on the banks of the river Yamuna. The river Yamuna flows from north to south. A
hard rocky ridge running from the Southern border of NCT in the south west in a north easterly
direction to the western banks of the river Yamuna near Wazirabad barrage forms the main
watershed in NCT of Delhi. The topography created a drainage system that carries rain and storm
water from the higher elevations of the West to the Yamuna. The eastern low-lying side was
originally part of the flood plain of the river and considered unhabitable. Today however this
Eastern wing, also known as the Trans Yamuna area, houses about 23% of the total population of
Delhi.
The hydro geological situation is characterized by the occurrence of alluvial and hard rock
formations and controls the groundwater availability in the territory. The quality of the groundwater
in the hard rock formation in Delhi is generally potable, whereas in the alluvial formation
groundwater, the water quality deteriorates with depth. Hard rock formation is found to be in North
East – South West to North North East – South South West with steep dips towards South East and
East. During 1960 – 2001, ground water levels were observed to have declined by 2 – 6 m in most
parts of the alluvium areas. A decline of 8 – 20 m is recorded in Najafgarh Block and in Mehrauli
Block the decline is 8 – 35 m.
Dwarka is located in the western part of the NCT Delhi, on older alluvial plains. Dwarka’s
hydrology is characterized by the proximity of the Najafgarh Drain which forms the western limit
of the sub-city, and constitutes an important source of groundwater recharge. In the Dwarka clay
and kankar formation exists in the top layer upto a depth of 4m below ground level. This layer of
clay is followed by kankar and silt upto a depth of 68 m below ground level. The thickness of the
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