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Introduction
CRZ
Study Area
Objectives
&
Methodology
Results
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Coastal
Regulation Zone of Nagapattinam District
Geographic Location:
This
coastal zone starts north of Kolidam river and ends with east of Atirampattinam.
Geographically it is located between 79º 37' 30''-79º 50'12''E longitude and 10º
15'-11º 12'46'' N latitude.The
coastline runs in the North-East direction
From Kollidam to Kodikkarai and it
runs east to west direction
from Kodikkarai to Atirampattinam .
Physiography:
This
stretch consisting of a narrow region of sandy beach along the coast in the delta
region of Cauvery river. The are salt pans near Thirumullaivasal and Tharangampadi.
In the south there is the permanent Vedaranyam swamp region with mangrove forest.
The southern boundary of of this stretch is marked by the change in the coastline
from the south to east direction, from Point Calimere to Rajamatam.
Geology:
The
coastal sands of recent age overlie the Tertiary rocks.
Fig: Coastal
Regulation Zone Information in Tamil Nadu : Nagapattinam District
Geomorphology:
The
geomorphologic features observed in this stretch are sub aerial delta, strand
plain, crevasses, chennies, cuspate bars, estuarine and swamps. The large part
of the delta is occupied by their distributory flood basins comprising brown and
reddish gray silty clay and fine sands. The coastline of Nagapattinam is straightened
by south bound long shore currents from the Kollidam river mouth to point Calimere.
From Point Calimere to further south the coastline forms a bay.
Natural Resources:
There
are two main belts of heavy mineral sands that is . Pudupuram-Poompuhar-Tharangampadi
belt and Tharangampadi-Nagore belt. There are two occurrences of silica sand one
near Kariapattinam and another near Thillaivilagam falling in Vedaranyam and Thiruthuraipoondi
taluks.
Distribution
of Coastal Regulation Zone:
The
different coastal regulation zone class of Cuddalore and Villupuram District coast
and their areal extent are presented in the Table.6.
Table.6:
Coastal Regulation Zone classes for Nagapattinam District
| CRZ-I
sq.km | CRZ-II
sq.km | CRZ-III
sq.km | LTL
km | HTL
km | 100m
line km | 200m
line km | 500m
line km | | 27.74 |
5.07 |
35.64 |
203 |
256.18 |
Nil |
51.94 |
126.06 |
Human Settlement:
This
district comprises of five taluks that is . Nagapattinam, Sirkazhi, Tarangampadi,
Mayiladuturai and Vedaranniyam. Total population of this district is 13,77,601
in this 6,91,123 are male and 6,86,478 are female. The important occupation is
fisheries and cultivation.
Industries:
The
Indian Steel Rooling Mills in Nagapattinam, M/s. WIMCO Ltd Bromine Extraction
Plant at Vedaranyam and M/s. Mettur Chemical and Industriel Corporation Limited
in Vedaranyam are the important industries in this district.
Climate:
The
minimum and maximum temperature are 20 C and 34 C. This stretch is the most vulnerable
area for cyclones and especially Vedaranyam and Nagapattinam are the most cyclone
prone area.
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