sit aquaculture
TRANSCRIPT
Potential Applications of Spatial Information Technology in Aquaculture
and Inland FisheriesBy
M.N.Reddy, G.P.Reddy and B.S.Sontakki
M.N.Reddy NAARM,Hyderabad
Spatial Information Technology
Geographical Information system(GIS) +
Global Positioning system(GPS)+
Remote Sensing(RS)
Sustainable management of Natural Resources:
• Spatial distribution and Resource inventoryof water bodies including small water bodies
• Site selection for targeted fish species
• Trade-offs among alternative usesof natural resources
• Environmental impact assessment
• Sustainable fish farming developmentthrough selection of suitablesites for fish ponds etc.
Some Potential applications
· How many water bodies are there?
· Where are they?
· What is their size distribution?
· What amount of water do they maintain during the dry season?
· Are their present uses compatible with fisheries and aquaculture?
· How productive are they biologically?
Inventory of Water Bodies
Objectives:
• To estimate area under Aquaculture in mandals(Blocks) of East and West Godavari districts of Andhra Pradesh
• To select representative samples for primary data collection
Data
• IRS P6 (Resource Sat) data (Sensor: AWiFS, resolution:70m
• AP Mandal Map (Block)
• AP District Map
Andhra Pradesh District Map
Andhra Pradesh Mandal Map
East Godavari
West Godavari
East Godavari and West Godavari Mandals Shape file
West Godavari
East Godavari
IRS-P6 Data product
Product Code: STPCD027J
East Godavari and West Godavari Districts image
Yelamanchili Mandal from West Godavari DistrictMandal Subset
Legend
Rice Fields
Water Body
Forest
Settlements
Fallow land
Sandy Area
!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.!.
West Godavari District
Yelamanchili Mandal Landuse
Map
Yelamanchili Mandal Water body
Map
Pond Location
Sites Favorable for Tropical Shrimp Farming(CNES – IFREMER, 1987)
LAND SUITABILITY ANALYSIS FOR AQUACULTURE
Themes(maps) to be overlaid in GIS•Water resources (rivers, streams, lakes ,
dams etc.)•Land use type (agriculture, irrigation, shrimp
farming, forestry etc.)•Environmental characteristics (temperature,
elevation, soils etc.)•Protected areas (Mangroves, conservation
zones etc.)•Pollution sources (location of industries,
sugar factories, domestic waste etc.)Urban development (Cities, towns andvillages)
Land Suitability Maps (Nath et al.2000)
Suitable lands for Brackish Water aquaculture
Suitable lands for Brackish Water Shrimp culture
Land suitability for development of watershed pond aquaculture
1. Suitability of Soils for Catfish farming
development
2. Suitability of Soils for Catfish farming compared with the locations of existing farms
Lake Dynamics Using RS and GIS
Objective:To test the feasibility of using RS datato study shoreline dynamics
Map of the Dynamics of the Lake
Identifying Areas for Fish Pond Development
• Ground water depth.• Water quality.• Soil chemical characteristics - as they affect water
productivity and quality.• Distance from feed suppliers and fish processing
plants - as they affect transport costs.• Spatial development cost variations, e.g. cost
penalties for siting within the 100yearfloodplain area.
• A slope map could have been incorporated to eliminate the subjectivity in assessing relative ratings
• Loss of Mangrove forest of fertile Land
• Degradation of soil due to sedimentation
• Determination of water quality
Environmental Impact Analysis of Shrimp Farming ( Tripati, 2005)
Environmental degradation:
PRA integrated to GIS : Mangrove Management (Agdalle & Boromthanarat, 2003)
PRA Data Ground truthing Topographic Map
DigitizedAccuracy Assessment
Base MapMangrove Database
Mangrove Forest Themes
Data Analysis/Overlaying
TablesFinal Map
Results and Conclusion
• PRA information on species, density and location of mangrove forest is highly accurate
• PRA is not accurate tool for area determination of Mangroves Like GPS and RS technologies
• PRA and GIS input provided the framework for integrating data on resources, social, legal and institutional structures
GIS model to assess development patterns of small-scale Rural aquaculture in the wider
environment(Bush,2003)
GPS: To record Latitude and longitude
Information on Fish Ponds• Species stocked• Number of fish stocked• Area of Pond• Types of Food used• Age of Ponds• Main uses of harvestd
fish
Research questions:• What area in the district have potential for
further activities by the government or development agencies?
• How and why are fingerlings of different species traded throughout the district?
• What influence does the availability of water resources have on farmer’s adoption of aquaculture?
• What are the marketing constraints and potentials for farmers in different parts of the districts?
Feature Trends of GIS Applications in Aquaculture:
• Need for workshops
• Efforts in Education?• GIS a routine analysis
• Collaboration with regard to strategic natural resource management
Thank You