workshop: community mapping and empowerment by nagesh kolagani
DESCRIPTION
These are the sheets used during the workshopTRANSCRIPT
Community Mapping and Empowerment:Case Study of Water Management in a South Indian Village
3rd International Open Source GIS ConferenceVelp, The Netherlands
June 25-28, 2012
Nagesh Kolagani, Dr. Palaniappan Ramu and Dr. Koshy VargheseIndian Institute of Technology Madras, Chennai 600036 INDIA
Location Map of Project Villages in South India
Parigi villages (22) (phase II)
E. Palaguttapalli village (phase I)
IIT Madras
Up to 1970’s: Community-based Rain Water Harvesting
FOREST
STREAMS
RESERVOIRS
WELLS FARMS
Up to 1970’s: Sustainable Water Usage
Number of wells: 76● Open wells
During 1980’s and 1990’s: Excessive Water Usage
Number of wells: 198● Open wells● Tube wells
Since 2002: Water Crisis
Number of wells: 59● Open wells● Tube wells
Falling Ground Water Levels over Decades
1970's 1980's & 1990's post-2001
-200
-180
-160
-140
-120
-100
-80
-60
-40
-20
0Ground level
Hard rock
Water and Agriculture Over the Decades
Number of wellsArea under irrigationGround water table depth10-year return on investment
1970's 1980's & 1990's Post-2001
-150
-100
-50
0
50
100
150
200
250
Ground Water Exploitation
Number of wellsArea under irrigationGround water table depth10-year return on investment
1970's 1980's & 1990's Post-2001
-150
-100
-50
0
50
100
150
200
250
1970's 1980's & 1990's Post-20010
1
2
3
4
5
6
7
8
9
Discharge / Recharge
Economics of Irrigated Agriculture
Statistics of one project village:Number of households: 300Average land holding: 1 hectareAverage annual income: € 800
Losses in one such village:
€ 2,400 / family towards capital costs
€ 4,200 / year for government towards free electricity
Water-intensive commercial cropsup to 2001
Problem: Water Crisis since 2002
Rain-fed subsistence cropssince 2002
Solution: Water Harvesting Structures
Blackboard Sketch of People's Suggestions
Field Visits to Proposed Locations
A Sample Plan for Proposed Structures
No location information for facilitating monitoring & visualization
GPS/GIS Map of People's Suggestions
For monitoring & visualization; Enforces participation & field visits
Social Benefit Analysis of Proposed Structures
For facilitating discussions among people
A Structure Well-planned and Constructed by Neighbours
Started working as a Successful Silt Trap within 1 Month
Extending these Lessons to Other Villages
Thank You!
Credits: To the local youth & To the farmers