STUDY OF THE ECOLOGICAL STUDY OF THE ECOLOGICAL IMPACT OF SEWAGE IMPACT OF SEWAGE

IRRIGATED VEGETABLE IRRIGATED VEGETABLE FARMING and sewage fed FARMING and sewage fed aquaculture OF CALCUTTA aquaculture OF CALCUTTA

METROPOLIS USING REMOTE METROPOLIS USING REMOTE SENSING & SENSING & GISGIS

Site No. 1208 West Bengal, India

Ramsar Dr. Nitai KunduSr. Scientist, Institute of Environmental Studies & Wetland Management& Chief Technical Officer, East Kolkata Wetlands Management AuthorityB 4, LA Block, Salt Lake, Sector –III, Kolkata – 700098, India.

INDIAWEST BENGAL

EKW

LOCATION OF EAST KOLKATA WETLANDS

EAST KOLKATA WETLANDS (EKW)

Pisciculture , Agriculture, Vegetable Farming

Using Urban Sewage & Solid Waste

OBJECTIVES

•Creating a spatial database of sewage flow and distribution pattern in the East Kolkata Wetlands in GIS Environment using space borne data and collateral data.

•Monitoring the change in the sewage distribution pattern over the time period, crop growth status in the sewage fed farms and condition of sewage fed fishery ponds using ALOS AVINIR-II data.

•Stimulating long term sustainability of sewage water irrigation with respect to crop and soil.

•Comparative study of Landuse using PAN and LISS III merged data and AVINIR –II data.

CANAL NETWORK OF EKW

PARAN CHAPRASI KHAL

GHOSHER KHAL

DEARA KHAL

BIDYADHARI

BOYNALA KHAL

Sc. City Crossing

KESTOPUR KHAL

EKW BOUNDARY

NalbanNalban

FFC

Ghosher Khal

Paran Chaprasi Khal

Nerinir Khal

Nodor

Deara

Lalkuthi

Kheyadaha

Baidyadhari Part

Kachagheri-Jhaukhali

Sumidgiri

Boynala

Parallel DWF

Bidyadhari

TP-Bajbarantala Link

Kharki-Belekhali

EAST KOLKATA WETLAND CANAL CATCHMENT AREA

• Water Spread in the sewage fed ponds and other ponds are identified.

• Water catchment areas are identified, specially along the canals.

• Plot level boundaries are overlaid on the mouza maps.

• Plot level landuse classes are identified on IKONOS 1mt x 1mt resolution maps.

• PAN LISS III merged data has the resolution of 5.8mt x 5.8mt whereas AVINIR II data has the resolution of 10mt x 10mt.

AGRICULTUREWATERBODYSETTLEMENTPRODUCTIVE FARMINGAGRICULTURE- WATERBODYAGRICULTURE- SETTLEMENTWATERBODY- SETTLEMENTWATERBODY- PRODUCTIVE FARMINGSETTLEMENT - PRODUCTIVE FARMINGAGRICULTURE- WATERBODY-SETTLEMENT

LEGEND

PLOTWISE INFORMATION

Existing land use pattern of East Kolkata Wetland

WaterbodyWaterbody 5,852 ha (fish 5,852 ha (fish farming farming 3,898.70ha)3,898.70ha)--46.82%46.82%

Agriculture LandAgriculture Land 4,718.56ha4,718.56ha--37.75%37.75%

Garbage Disposal Garbage Disposal sitesite

602.78ha602.78ha--4.82%4.82%

Urban Settlement Urban Settlement AreaArea

91.53ha91.53ha--0.73%0.73%

Rural Settlement Rural Settlement AreaArea

1234.99ha1234.99ha--9.88%9.88%

Total AreaTotal Area 12,500ha12,500ha

AVINIR II Data- Dated 09.01.2007

PAN-LISS III Merged Data- Dated 24.02.2006

FULL RESOLUTION IMAGES

PAN-LISS III MERGED

AVINIR II

CLASSIFIED DATA

AVINIR II

PAN- LISS III MERGED

RESULTS

•Spatial database creation of the study area for canals, sewage channels and vegetable farming area is already done using LISS III and PAN merged data.

• Plot level landuse of the study area is delineated using cadastral map and high resolution satellite data. Landuse classes are identified using non supervised technique of classification method.

• Regarding the PAN and LISS III merged data the urban area signature mixing with moist area class. But in AVINIR II data urban signature have identification problem. Thus it appears that identification of urban class signature in both AVINIR-II and LISS-III - PAN merged is not properly identified.

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