Table-1 Ownership of Land
Owner/ user of the land | Area | Owner/ User of the land | Area |
Perungudi STP (Total Area) | 957 | Alandur Mun. STP | 20 |
STP | 31 | STP-CCRCP | 100 |
Corp. of Chennai for Garbage Dumping | 74 | Highways Department- Radial Roadways | 25.60 |
Remaining land (Swamp Area) | 706.40 |
Table 2 - Flora of South Chennai Wetlands
S.No | Plant Name | Family | Colloquial Name | Values |
1 |
Typha Angustifolia |
Thyphaceae |
Elephant grass, Sambu |
Fodder |
2 |
Eicchornia Crassipes |
Potederiaceae |
Water Hyacinth, Aagaya thamarai. |
Fodder |
3 |
Brachiaria Mutica |
Poaceae |
Buffollow grass, Sanampullu. |
Fodder |
4 |
Sparganium Erectum |
Sparganiaceae |
Vengaya thamarai. |
Fodder |
5 |
Ceratophyllum Linn. |
Ceratophyllaceae |
Nasu. |
Cooling, usefull in biliousness, hairs contain microphyllin |
6 |
Vallisneria |
Hydrocharitaceae |
Kuthirai vellam pasi. |
Edible, ornamental plant |
7 |
Ipomoea Aqatica Forsk. |
Convolulaceae |
Swamp cabbage, vellai keerai |
Edible, good source of minerals and vitamins |
8 |
Ipomea Crassa |
NA |
Lotus, Alli thamarai |
Edible and ornamental, seeds employed in cetaceous diseases |
9 |
Maritima Suaeda |
Chenopodiaceae |
Common Indian salt wort, Vellakeerai |
Edible and reclamation for saline soil. |
10 |
Nymphaea Linn. |
Nymphaeaceae |
Europian white lilly, Alli |
Edible, used for alcohol ind., tanning, has medicinal values. |
11 |
Cressa Cretica Linn. |
Convolvulaceae |
Uppu marikolunthu |
Used as tonic, aphrodisiac and stomachic. |
12 |
Calotropis gigantean |
Asclepiadacae |
Erruku |
Twine, seed for stuffing mattress and pillows. |
13 |
Datura metal Linn. |
Solanaceae |
Karu Uumathambai |
Leaves narcotic and antispasmodic, oil seeds |
14 |
Parthenium Linn. |
Astraceae |
Mukuthi poo |
Medicinal,fonic, dysentery |
15 |
Acacia nilotica Linn. |
Mimosaceae |
Mimo, Karuvelam. |
Tannin, furniture works |
* NA – Not available
Table 3 -Fauna of South Chennai Wetlands (March & April)
S.No
|
|
Common Name
|
Italian Name
|
1 |
FISHES
|
Tilapia |
Tilapia mossa |
2 |
Cat fish |
Mystus guilo |
|
3 |
Snake head fish |
Ophice phallus punctatus |
|
4 |
Mosquito fish |
Gambusia affinis |
|
5 |
LIZARDS |
Gardern Lizard |
Calotes versicolor |
6 |
Monitor Lizard |
Varanus spp. |
|
7 |
Black pond turtle |
Melanochelys tarjuda |
|
8 |
Termite Gecko |
Hemidactylus spp. |
|
9 |
MAMMALS
|
Three stripped ground squirrel |
Funambulus Palmarum |
10 |
Bandicoot rat |
Bandicota indica |
|
11 |
Mongoose |
Herpestes edwardsi |
|
12 |
Black napped have |
Lepus nigricolis |
|
13 |
FROGS |
Green frog |
Rana crassa |
14 |
Narrow mouthed frog |
Microhyla rubra |
|
15 |
Trec frog |
Polypedatus maculates |
|
16 |
Common toad |
Bufo melonastictes |
|
17 |
Ferguson’s toad |
|
|
18 |
SNAKES |
Checked Keelback |
Xenochrophis piscator |
19 |
Vine snake |
Ahaetulla nasutus |
|
20 |
Bronze back tree snake |
Dendrolaphis tristis |
|
21 |
Striped keelback |
Amptiesma stolata |
|
22 |
Rat snake |
Ptyas mucosus |
|
23 |
Common skink |
Mabuya cainato |
|
24 |
Snake skink |
Riopa punctata |
Sl. |
COMMON NAME |
LATIN NAME |
TAMIL NAME |
R/RM/M |
1 |
Little Grebe |
Tachybaptus ruficolis |
Tanni Pullu |
R |
2 |
Little Cormorant |
Phalacrocorax |
Pambuttara |
RM |
3 |
Darter (snake bird) |
Anhinga rufa |
Neela Kagam |
RM |
4 |
Purple Heron |
Ardea purpurea |
Perin Vellai Kokku |
RM |
5 |
Grey Heron |
Ardea cinerea |
Sambal Narai |
RM |
6 |
Paddy Bird |
Ardeola grayii |
Kulatthu Kokku |
RM |
7 |
Cattle Egret |
Bulbulcus idis |
Unni Kokku |
RM |
8 |
Chestnut Egret |
Ixobrychus cinnamomeus |
Kuruttu Kokku |
RM |
9 |
Little Egret |
Egretta garzetta |
Chinna vellai Kokku |
R |
10 |
Bittern |
Botaurus stellaris |
NA |
M |
11 |
Old billed Stork |
Mycteria leucocephala |
Nathai Kuthai Narai |
RM |
12 |
Black winged Kite |
Elanus Caeruleus |
NA |
R |
13 |
Common pariah kite |
Milvus migrans |
Periya Parandu |
R |
14 |
Shikra |
Accipiter badius |
NA |
R |
15 |
Buzzard |
Buteo |
Parandu |
M |
NA- Not available · R – Residential · M – Migratory · RM – Residential and migratory
Table 5– Socio-Economic attributes of South Chennai Wetlands
Village |
ToPopn |
Male |
Female |
SC |
Lit |
Mlit |
Flit |
Agr |
Vac |
Ind |
Res |
Medavakkam |
6432 |
51 |
48 |
22 |
49 |
58 |
39 |
15 |
25 |
25 |
30 |
Far Flung from Chennai city- hence low literacy rate. |
|||||||||||
Jalladempettai |
5062 |
50 |
49 |
5 |
62 |
68 |
52 |
25 |
25 |
10 |
20 |
Female are predominantly house hold workers here |
|||||||||||
Pallikaranai |
7822 |
52 |
47 |
28 |
67 |
73 |
61 |
35 |
NA |
NA |
NA |
Heart of the wetland, Other State Populace and NIOT |
|||||||||||
Perungudi and Seevaram |
9709 |
53 |
46 |
70 |
59 |
62 |
8 |
NA |
35 |
NA |
NA |
STP located here, twin villages form the part of the town panchayat headquartered at Perungudi |
|||||||||||
Velachery |
43,796 |
51 |
48 |
11.7 |
73 |
79 |
86 |
NA |
NA |
NA |
NA |
Cosmopolitan Urbanized, Real Estate heaven, MRTS, MNCs |
|||||||||||
Okkiyam Thoraipakkam |
9679 |
53 |
46 |
11 |
69 |
77 |
61 |
20 |
25 |
NA |
30 |
Jeppiar Educational Trust |
Mapping tech. |
Categories |
Location |
Habitat Zones |
Open Water |
Central and south east |
|
Between Open Water & Shore Land |
Central south |
|
Shore Land |
Central |
|
Barren |
North, South, Central, SE and SW |
|
Sparsely Vegetated Barren Islet |
SE , SW and North |
|
Built Up |
North and South |
Turbidity |
Low Turbidity |
Central and South East |
|
Medium Turbidity |
East, central and South |
|
High Turbidity |
Scattered all over |
Vegetation |
Water |
Central, South |
|
Submerged Vegetation |
Central |
|
Polluted Vegetation |
North and South |
|
Floating Vegetation |
Central , North And South |
|
Shore Land Vegetation |
Around deep waters |
|
Emergent Vegetation |
Central |
|
Dry Vegetation |
South |
|
Shrubs |
East and south |
Land Use |
Deep Water, |
Central and South East |
|
Shoreline Vegetation |
North West and Central |
|
Dry Beds, |
North, Central and South |
|
Shallow Water, |
|
|
Thick Vegetation |
Thick vegetation |
|
Contaminated Vegetation, |
South |
|
Built Up Areas |
South West and North |
|
Landfills |
Central |
|
Open Areas |
South, South East and East |
RESULTS OF THE WATER QUALITY
Water samples collected from the South Chennai Wetlands
Date of collection: 12th April 2002
Parameters |
Sample 1 |
Sample 2 |
Sample 3 |
Sample 4 |
Sample 5 |
PHYSICAL EXAMINATION |
|
|
|
|
|
Appearance |
Sly, Blackish |
Sly, Blackish |
Sly, Blackish |
Sly, Blackish |
Sly, Blackish |
Odor |
H2S Smell |
H2S Smell |
H2S Smell |
H2S Smell |
H2S Smell |
Turbidity NTU |
26.9 |
42.0 |
66.9 |
69.6 |
83.2 |
Total Dissolved Salts |
1516 |
3020 |
3036 |
2704 |
2840 |
Electrical Conductivity mic S/cm |
2092 |
4236 |
4246 |
3681 |
3895 |
CHEMICAL EXAMINATION |
|
|
|
|
|
PH |
7.96 |
7.83 |
7.88 |
6.99 |
7.26 |
Alkalinity Ph as CaCO3 |
0 |
0 |
0 |
0 |
0 |
Alkalinity Total as CaCO3 |
556 |
788 |
808 |
720 |
680 |
Total hardness as CaCO3 |
464 |
720 |
710 |
590 |
670 |
Calcium as Ca |
98 |
188 |
200 |
144 |
172 |
Magnesium as Mg |
53 |
60 |
50 |
55 |
58 |
Sodium as Na |
207 |
540 |
531 |
459 |
486 |
Potassium as K |
37.5 |
70 |
65 |
55 |
55 |
Iron Total as Fe |
0.09 |
0.29 |
0.11 |
0.46 |
0.52 |
Mangneese as Mn |
Nil |
Nil |
Nil |
Nil |
Nil |
Free Ammonia as NH3 |
37.72 |
52.92 |
50.91 |
70.42 |
53.86 |
Nitrate as NO2 |
0.008 |
0.03 |
0.015 |
0.007 |
0.028 |
Nitrate as NO3 |
0.45 |
0.09 |
1 |
Nil |
0.45 |
Chloride as Cl |
318 |
980 |
1004 |
735 |
833 |
Flouride as F |
0.44 |
0.3 |
0.07 |
0.66 |
.38 |
Sulpahte as S04 |
24 |
28 |
42 |
267 |
221 |
Phospahate as PO4 |
19.60 |
28.11 |
33.43 |
23.08 |
19.89 |
Tidy’s test |
20 |
36 |
36 |
123 |
97 |
Silica as “SiO2” |
4.72 |
5.68 |
3.21 |
67.24 |
57.66 |
Note: All the samples were collected on the 12th of April,2002
Sample 1: Velacherry tank,
Sample 2: Pallikaranai Swamp - proximate to the Velacherry –Tambaram Main Road opposite to the Alandur Municipality,
Sample 3: Pallikaranai Swamp – intersection of the Velacherry –Tambaram Main Road and the Pallavaram By-Pass, near NIOT ,
Sample 4: Pallikaranai Swamp – Underbridge near the Thoraipakkam intersection close to the Perungudi STP,
Sample 5: Pallikaranai +Swamp –inlet of the sewage in the Perungudi STPs
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