GLOBAL WATER PARTNERSHIP CONJUNCTIVE USE OF GROUNDWATER & SURFACE WATER obstacles and benefits of a planned approach Dr STEPHEN FOSTER GW-MATE Director (IAH President)
GROUNDWATER RESOURCE USE stages and impacts of development
GROUNDWATER SALINISATION understanding its diverse origins
Mendoza Tununyan Alto groundwater and surface water use rights
KNOWING THE GROUNDWATER USER detailed survey of irrigation water use Mendoza Oasis - Argentina
ELECTRICITY CONSUMPTION DATA AS A SURROGATE FOR WATERWELL USE & GROUNDWATER EXTRACTION average data from Mendoza for 2002-06 06
BENEFITS OF IMPROVED IRRIGATION METHODS on real water-saving and energy conservation engineering, agronomic and operational measures
CONJUNCTIVE USE OF SURFACE WATER & GROUNDWATER definition of the concept provision of water-supply demand centre (urban area, industrial plant, group of agricultural irrigators) in parallel from surface water and groundwater sources to improve water-supply security and water-resource resource use efficiency surface water and groundwater sources involved can be hydraulically independent or linked can arise spontaneously but to achieve efficient results needs to be planned (especially in hydraulically-linked linked case)
CONJUNCTIVE USE OF SURFACE WATER & GROUNDWATER RESOURCES planned development for urban water-supply aquifer hydraulicallyindependent from river * * treated wastewater could be pumped and discharged upstream of city to reduce impact of abstraction aquifer and river hydraulically-connected *
CONJUNCTIVE USE OF SURFACE WATER & GROUNDWATER in the rural environment
CONJUNCTIVE USE OF SURFACE WATER & GROUNDWATER the reality in major areas of irrigated agriculture conjunctive use widely practised on spontaneous basis in response to inadequate irrigation canal- water availability both spatially and temporally usually implemented unplanned and often in crisis mode in response to surface water drought in order to mitigate crop-losses often results in groundwater providing a large proportion of total water-supply even in major irrigation canal commands but with little investment on integrated management integrated management much needed (especially to combat problems of increasing salinisation) but there are significant socioeconomic and legal-institutional impediments to overcome
GROUNDWATER MANAGEMENT PARTNERSHIPS local government and community working together
DELINEATION OF GROUNDWATER BODIES for water resource management purposes
MENDOZA MAJOR OASIS MONTECASEROS BRANCH surface water groundwater use
ECONOMICS OF GROUNDWATER USE ECONOMICS OF GROUNDWATER USE close average gap between full economic cost and what users pay (with targeted subsidies for poor users)
MENDOZA SURFACE & GROUNDWATER RESOURCES comparative supply cost for irrigation users
CONJUNCTIVE USE OF SURFACE WATER & GROUNDWATER Gangetic Plain - Uttar Pradesh - India
GANGETIC PLAIN AQUIFER one of the world s s greatest aquifer systems
SOIL WATERLOGGING & SALINISATION ON THE GANGETIC PLAIN along Ramganj secondary canal Sultanpur District (UP) waterlogged area sodic-land sodic-land secondary canal
Source: Central Ground Water Board Jaunpur Branch
HYDROGEOLOGICAL CONDITIONS OF GANGETIC PLAIN interfluve canals as recharge mounds and rivers as discharge sumps
CONJUNCTIVE USE OF SURFACE WATER & GROUNDWATER approach in Uttar Pradesh engineering and management measures to reduce upstream canal-water losses and over-irrigation improve canal-water distribution and downstream irrigation service levels farmer education and financial investment for sodic-land mitigation (including stimulus for increased groundwater use in upstream areas ) reducing groundwater extraction in downstream areas with improved canal-water availability crop diversification to improve water productivity
CONJUNCTIVE USE OF SURFACE WATER & GROUNDWATER Mendoza Oases - Argentina
rh5 Carrizal Valley
MENDOZA CARRIZAL AQUIFER characteristics of groundwater flow regime
MENDOZA CARRIZAL AQUIFER growing problem of groundwater salinisation
MENDOZA CARRIZAL AQUIFER characteristics of groundwater flow regime
CONJUNCTIVE USE OF SURFACE WATER & GROUNDWATER approach in Mendoza Carrizal Aquifer declare areas of restriction to prevent further growth in numbers of irrigation waterwells constrain spatial transfer of groundwater use rights from down-gradient areas to terrenos chacra intensify monitoring of groundwater levels, use and salinity as basis to ensure continued aquifer drainage caution about cumulative effects of improving irrigation efficiency (widespread adoption of drip technology ) ) since total groundwater resource consumption increasing (even if licensed abstraction fixed)
AN ADDED DIMENSION managed aquifer recharge
CONJUNCTIVE USE OF SURFACE WATER & GROUNDWATER important considerations for recharge enhancement effect of upstream recharge enhancement structures (contour trenching, streambed structures, etc) on downstream flow deployment of minor irrigation tanks (irrigation reservoirs or percolation ponds) appropriate water-user management boundaries/units
GROUNDWATER MANAGEMENT ISSUES IN AREAS WITH SMALL IRRIGATION TANKS
GROUNDWATER SUPPLY-SIDE SIDE INTERVENTIONS scope and limits of recharge enhancement valuable for specific water-supply problems not universal panacea for resource deficit
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