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HYDROGEOLOGY IN WATERSHED PLANNING: A PRACTITIONER’S VIEW
P.S. VIJAY SHANKAR
Samaj Pragati Sahayog, Bagli, District Dewas, Madhya Pradesh
SPS is committed to capacity building and mobilisation of rural communities for development.
Samaj Pragati Sahayog is a grass-roots voluntary organisation founded by 8 professionals from academic disciplines representing various Social and Life Sciences
Its basic mandate is the empowerment of the people.
SAMAJ PRAGATI SAHAYOG: AN INTRODUCTION
One of the most backward, neglected and drought-pronetribal pockets of India -- the Bagli tehsil of the Dewas district, Madhya Pradesh
Headquarters
Dewas district
Bagli
INDIAMADHYA PRADESH
HOW WE STARTED
• The Dewas Town Experience in 1990
• Severe, man-made crisis of groundwater on account of
unplanned industrialisation of a small town
• Initial watershed work – Neemkheda ponds
• Lessons learnt on working in different geological settings –
successes (percolation ponds in recharge areas) and failures
(irrigation ponds in dolomites).
• Beginning of our collaboration with ACWADAM – which is
now more than a decade old.
GROUNDWATER AND SURFACE WATER BASINS
• Watershed defined as a surface water basin is inadequate
• The notion of groundwater catchment has to be brought in
• The two catchments need not overlap always
• Hydrogeology & the correct location of watershed structures
• Aquifer properties (T & S) are highly variable
• This needs micro-level study and mapping
• The true watershed community is one which shares an
aquifer
FROM MAPPING TO TYPOLOGIES
• Rock strata do not occur in isolation
• Composite rock strata with varying aquifer properties and
physical layering gives rise to groundwater typologies
• Typologies are not just physical entities. They go with a
historically governed pattern of groundwater use by
communities
• Hence, groundwater typology is a socio-physical category
• The vexing issue of scale: determined by the degree of
interconnections between aquifers (“zone of interference”)
FROM TYPOLOGIES TO STRATEGIES
• The emerging idea is that groundwater is a community resource
• From this perspective, watershed development involves strategies
to ensure the protection and the sustainable and equitable use of
groundwater by the community
• Two key ideas:
• a) separation of Right to Water from the Right to Land – the
revolutionary idea of Pani Panchayats
• b) distinction between Basic and Economic Service – KR Datye -
following the principle of “specific egalitarianism” (James Tobin)
FROM TYPOLOGIES TO STRATEGIES
• Using these ideas we work out a scale of priorities for each
typology (drinking water, water for livestock, protective
irrigation, irrigation for second crop, other uses)
• To match the priorities, also work out the range of strategies for
community management of groundwater in each typology
• Not a technical exercise; an exercise in social decision making
backed by a scientific understanding of water
• People’s Institutions (PRI, VWC, SHGs, FPC) play a crucial role
• Village agreements on the basis of such detailed work
FROM TYPOLOGIES TO STRATEGIES
Community Sharing of Wells
Regulation of Crop Water Requiremt
Regulation of Depth and Distance
Pump Capacity Regulation
Efficient Use of Individual Wells
Recharge Area Protection
StpriBklyaNkhdPtlabNborSample Village
T 5T 4T 3T 2T IPROTOCOL
TYPOLOGY 1
CHARACTERISTICS
• Hilly, Forested Topography
• Underlain by Hard Rocks (Basalts of Deccan Trap)
• Seasonal Streams Carrying High Runoff
• Low and Uneven Availability of Groundwater
• Small Agricultural Component
• Acute Shortage of Drinking Water: Attempts by PHED, SPS
• Water Quality Issues
TYPOLOGY 1
Section – Typology 1
Protocols for Typology 1
• Top Priority: Drinking Water
• Protection of Recharge Areas
• Limited Water Harvesting in Discharge Areas (the stream)
• Community Use of Water in Groups
• Regulation of Deep Drilling
• No Irrigation Well within 50-75 m of Any Drinking Water Source
• Regulation of Cropping Pattern through Agricultural Programme
TYPOLOGY 5
• Flat Topography
• Underlain by Dolomitic Limestones (Vindhyans)
• Low Water Availability in the Shallow System
• Variable but High Availability of Groundwater at
Deeper Levels
• Low Scope for Water Harvesting (High Permeability)
• Rapidly Growing Agricultural Component Fuelled by
Competitive Drilling of Deep Bore Wells
Protocols for Typology 5
• Top Priority: Regulation of Groundwater Overuse
• Ban on Fresh Drilling of Bore Wells
• Regulation of Pump Capacity and Pumping Hours
• Protection of Drinking Water Sources
• Community Use of Water
• Regulation of Cropping Pattern through Agricultural Programme
WHAT DOES THIS MEAN FOR POLICY?
• A National Programme on Groundwater Management
• Mapping of Aquifers and Developing Location Specific Protocols
• Groundwater Pilots: Detailed Work in Specific Situations
• Focus on Demand Regulation
• Focus on Community Management and Equity
• Focus on Empowering People’s Institutions
• The Context of NREGA: Fund Availability vs Use
• Methodology of Estimation of Groundwater Potential Need to be
Changed
Thank You