Thrivallore NE - Zones
^. Water.shp
Study area.shp
Agricultural lan
Garden
E] Lay out
Ex] New Urban Area 1
New Urban Area 2
Town - Old Area
Village UR 1
Village UR 2
Figure.7. Study Area Health Zones
4.2. Thiruvallur Temple tank
As urbanisataion started from 1940 to 1970 the tank is not
getting water from near by water sources . The feeder
channels were closed due to construction of houses near the
temples. The outer tank (Figure 8) area has been polluted
and used as solid waste dumping yard. The baby tank in the
Figure .8. Temple Tank Thiruvallur
Temple tank is now filled with water. The outer tank area is
developed now as a park with roads and Car and Vehicle
Park area.(Figure 9). The reduction of storage in tanks has
lead to depletion of good quality ground water. The houses
near by depends on 70to 100 feet bore wells to tap water
from the unconfined aquifer.
eur
E C S E Lo
Figure .9.Temple Thiruvallur with Tank Park & Roads
Using shallow open wells which were recharged from the
water stored in the outer tank is a thing of past. This town
now depends on Poondi reservoir for drinking water by
Public Water Distribution system.
4.3.High resolution data to study Urbanisation impacts
Urbanization, industrialization, increase in no of
engineering colleges and Higher education institutes, has
International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XXXIX-B8, 2012
XXII ISPRS Congress, 25 August — 01 September 2012, Melbourne, Australia
transformed this rural area as a nodal centre for Industry,
education and other services.
Figure 10. Part of Thiruvallur Town ‘Central )
This area shcwn above is near the Cer ral Bus station
between the wo Major tanks in the N«rth and Cooum
river near Thi uvallur - Chennai Railway line. This area
was once was 1 nder intensive agriculture. The tanks in the
above and. are i dicated with blue colour i1 Fig. below.
Figure 11. Thiruvallur Town Part ( Central )with details of
water bodies
5.IMPACT OF INCREASE IN POPULATION
DENSITY
The population density has increased by 26 times from 500
per sq km in 1951 to 13000 per sq km in 2011. The image
below shows the houses and housing plots near between
railway station and bus stand.(Fig.15) The cluster houses
Figure 12.Houses and Plots near Thiruvallur Station -
Individual Houses plotted from High Resolution data.
shown above need surface water and under ground sewage
system .The water resources like tanks are degraded and
some are used for dumping yard for waste. The sewage also
some times drains in rainy season. The lands near water
spread are developed as housing plots disturbing the natural
drainage system. These new housing colonies are flooded
even for small intensity of rain fall.
S.l.Ecologic and Environment impact on urban
structures.
Solid waste management and Waste water disposal are
observed as main drainage problems in the event of rains.
Internati
Figure
The image:
Railway st
These may
if care is n
religious |
modern ho
noticed in
demonstrat
environme
af
Figure.16.
High Resc
7.Conclus
The study
available
satellites
