ENVIS Centre, Ministry of Environment & Forest, Govt. of India
Printed Date: Thursday, January 16, 2025
Punnakayal estuary
|
Name of the estuary
|
Punnakayal estuary
|
|
Name of the river
|
Thamiraparani
|
|
Place
|
Punnakayal
|
|
District
|
Thoothukudi
|
|
State
|
Tamil Nadu
|
|
Important landmarks
|
Punnakayal
|
|
Average Depth
|
2 m
|
|
Type of the estuary
|
Bar-built
|
|
Water temperature
|
27°C
|
|
Nature of the substratum
|
Muddy
|
|
Salinity
|
29.9 ppt
|
|
Dissolve doxygen
|
4.54 ml/l
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Image
River Basin Map
Photos
Physico-chemical parameters
Heavy metals in the water (mg/L) of PUnnakayal station 1 and 2
|
Sl.
No.
|
Months
|
Zn
|
Pb
|
Fe
|
Cr
|
|
S1
|
S2
|
S1
|
S2
|
S1
|
S2
|
S1
|
S2
|
|
1
|
Feb. ‘08
|
BDR
|
BDR
|
0.051
|
0.048
|
0.71
|
0.45
|
BDR
|
BDR
|
|
2
|
Mar. ‘08
|
0.38
|
BDR
|
0.030
|
0.026
|
0.99
|
0.81
|
0.150
|
0.130
|
|
3
|
Apr. ‘08
|
BDR
|
BDR
|
0.020
|
0.020
|
0.78
|
0.75
|
0.080
|
0.080
|
|
4
|
May ‘08
|
BDR
|
BDR
|
0.020
|
0.010
|
0.11
|
0.10
|
0.06
|
0.040
|
|
5
|
June ‘08
|
0.25
|
0.25
|
0.033
|
0.030
|
0.61
|
0.65
|
0.068
|
0.064
|
|
6
|
July ‘08
|
0.31
|
0.21
|
0.035
|
0.011
|
1.80
|
0.80
|
0.066
|
0.058
|
|
7
|
Aug. ‘08
|
0.25
|
0.28
|
0.051
|
0.070
|
1.50
|
0.35
|
0.088
|
0.071
|
|
8
|
Sep. ‘08
|
0.28
|
0.25
|
0.050
|
0.065
|
1.60
|
0.38
|
0.100
|
0.091
|
|
9
|
Oct. ‘08
|
0.38
|
0.28
|
0.070
|
0.080
|
2.88
|
3.18
|
0.160
|
0.110
|
|
10
|
Nov.‘08
|
0.45
|
0.41
|
|