EIA Studies of 3 Pre-Identified Hazardous Waste Disposal Sites in ...

Rapid EIA Studies of 3 Pre-identified Hazardous Waste Disposal Sites in NCT - Delhi:
Page No.80
This site lies at the intersection of the Kanjhawla block and the Alipur block. Mapping
unit shown in Fig 4.21 is 22. The depth to bed rock is more than 300 m.
The soils here are the soils of the older alluvial plains known to be deep, well
drained, coarse-loamy soils on very gentle slopes with loamy sand surface and slight
erosion associated with deep well drained fine loamy soils with loamy surface, slight
erosion and slight salinity.
These soils belong to the Nabha –Ghoga series. This series includes fine loamy and
clayey soil, and is a member of mixed hyperthermic family of Udic Ustochrepts. The
clay percentage ranges from 16-38% with maximum over a depth of 69-100cm depth
bgl.
Soil characteristics of Site II
The site lies in the city block of the Delhi territory. Therefore the natural soil
characteristics have been degraded due to urban development and industrialisation.
It falls under miscellaneous category called quaternary alluvium.
Soil characteristics of Site III
This site lies in the Najafgarh block. Mapping unit as shown in Fig 4.21 is 21. The
soils found here are also the soils of the older alluvial plains known to be deep, well
drained, coarse -loamy soils on nearly level slopes with loamy surface associated
with deep well drained, fine loamy soils with loamy surface and slight salinity.
The soil is of the Daryapur -Hamidpur series. The colour of the soil is yellowish.
These soils are well-drained with rapid permeability.
Site IV: Bawana Old site:
The soil at this site is of Khampur-Hissar series. Mapping unit as seen from Fig 4.21
is 21. The soil of this association occurs on old flood plains on 1-3% slopes.
Khampur series is silty clay loam to clayey and the Hissar series is silty loam to sity
clay loam in texture. The soil of this site is extremely saline with white patches of salt
layer visible on the surface of the land. The soil of this site has been classified as
lands with problems of salinity and also water logging by NBSS & LUP.
At this site there are pockets of coarse loamy and fine loamy soils (8 to 10%). Large
chunks of barren landscapes with white and brownish surface incrustation are
common. They are uncultivated lands with pockets of salt resistant bushes of
Halozylon SPP. The electrical conductivity (total soluble salts) of surface soils are
higher than 12 µmhos/cm which gradually decreases with depth.
Fig 4.22 shows the extent of drainage in NCT- Delhi. Well drainage indicates the soil
is most suitable for agriculture from the point of view of irrigation. Site I & Site IV falls
under zone moderately drained whereas site III falls under zone well drained. Site II
falls under urban area.
Environment Division, National Productivity Council, New Delhi
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