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| Last Updated:: 02/02/2017

Ennore estuary

Ennor estuary
 
Name of the River
Kosathalaiyar
Place
Ennore
District
Tiruvellore
State
Tamil Nadu
Latitude
13° 15’N
Longitude
80° 19’E
Important land marks
Ennore
Average depth
2.5 m
pH
8.00
Water temperature
31.5° C
Nature of the Substratum
Hard-Muddy
Salinity
31 ppt
Alkalinity
196 ppm
Dissolved oxygen
3.91 ml/l
BOD
13.1 mg/l
Predominat Phytoplankton
Nitzschia longissima, Thallosiothrix frautiefeldii, Asterionella japonica, Navicula sp., Biddulphia mobiliensis, Ceratium furca
Commercially important shellfishes
Crassostrea madrasensis
Commercially important finsishes
Mystus gulio
Industrial effluent discharges
ETPS Industrial Effluent 4,49,000 liter/day
Sewage discharges
Domestic sewage 0.9 million gallons/day
Hazardous waste dumping
ETPS Fly ash

Image

Map

River Basin Map


Physico-chemical parameters

The variation of mean, standard deviation (SD) values of environmental variables in the Ennore estuary and the coastal water of Ennore, Chennai

 

Parameters

Ennore

Estuary Mean±SD

Ennore

Coastal water Mean±SD

Appearance

Clear,

colorless, odorless

Clear,

colorless, odorless

Temperature C)

29±0.05

29±0.04

pH

7.58±0.15

8.12±0.11

Salinity (‰)

27.56±1.22

33.70±1.75

Dissolved Oxygen (ppm)

5.3±0.65

6.7±0.91

Total Hardness (ppm)

5860±1.22

4640±1.34

Total Alkalinity (ppm)

157±1.46

76±1.11

Nitrite (mg/l)

0.82±0.28

0.21±0.41

Nitrate (mg/l)

9.37±1.15

4.47±0.89

Phosphate (mg/l)

1.02±0.11

0.57±0.06

Ammonia (mg/l)

1.68±0.60

0.53±0.79

Silicate (ppm)

2.41±0.26

1.01±0.35

 

 

Biological entities

 List of Gobioid fishes recorded

 

 

Ennore estuary

Order         :  Perciformes

Suborder   : Gobioidei

Family       :  Gobiidae

Subfamily :  Gobiinae

Acentrogobius cyanomos (Bleeker)

+

A. ennorensis Menon & Rema Devi

+

A. globiceps Hora

+

A. madraspatensis Day

+

A. viridipunctatus (Cuv. & Val.)

+

Favonigobius reichei (Bleeker)

+

Glossogobius biocellatus (Cuv. & Val.)

+

G. giuris (Ham.)

+

Oxyurichthys microlepis (Blkr.)

+

O. tentacularis (Cuv. & Val.)

+

Oligolepis acutipennis (Cuv. & Val.)

+

Parachaeturichthys polynema (Blkr.)

+

Stigmatogobius javanicus (Blkr.)

+

Subfamily  :  Apocrypteinae

Parapocryptes rictuosus (Cuv. & Val.)

+

Pseudapocryptes lanceolatus (Bloch & Schn.)

+

Boleophthalmus boddarti (Pallas)

+

B. sculptus Gunther

+

Subfamily:  Periophthalminae

Periophthalmus variabilis Eggert

+

Family         :   Taenioididae

Subfamily   :  Taenioininae

Taenoides anguillaris (Linnaeus)

+

T. buchanani (Day)

+

Brachyamblyopus urolepis (Bleeker)

+

Subfamily  : Trypaucheninae

Trypauchen vagina (Bloch & Schn.)

+

Ctenotrypauchen microcephalus (Blkr.)

+

 
 

References

 

Raghunathan, M.B. and K. Rema Devi, 2007. Threat to the biodiversity of the Ichthyofauna (Gobioids) of certain estuaries. Indian Hydrobiology, 10(2): 257–261.

Mohan Raj, V., S. Padmavathy and S. Sivakumar, 2013. Water quality parameters an it influences in the Ennore estuary and near coastal environment with respect to industrial and domestic sewage. International Research Journal of Environment Sciences, 2(7): 20–25