Your search found 6 records
1 Massuel, S.; Favreau, G.; Descloitres, M.; Le Troquer, Y.; Albouy, Y.; Cappelaere, B. 2006. Deep infiltration through a sandy alluvial fan in semiarid Niger inferred from electrical conductivity survey, vadose zone chemistry and hydrological modelling. Catena, 67:105-118.
(Location: IWMI-HQ Call no: P 7787 Record No: H039871)
2 Sharma, Bharat R.; Massuel, S.; Rao, K. V. G. K.; Venot, Jean-Philippe. 2009. Groundwater externalities of large, surface irrigation transfers: insights from the Godavari–Krishna river link, India. In Bloschl, G.; van de Giesen, N.; Muralidharan, D.; Ren, L.; Seyler, F.; Sharma, U.; Vrba, J. (Eds.). Improving integrated surface and groundwater resources management in a vulnerable and changing world: proceedings of Symposium JS.3 at the Joint Convention of the International Association of Hydrological Sciences (IAHS) and the International Association of Hydrogeologists (IAH), Hyderabad, India, 6-12 September 2009. Wallingford, UK: International Association of Hydrological Sciences (IAHS). 8p. (IAHS Publication 330)
River basin management ; Groundwater recharge ; Simulation models ; Irrigation canals ; Water balance ; Waterlogging ; Water transfer ; Groundwater irrigation ; Crop production / India / Krishna River Basin / Godavari River Basin / Indira Sagar Right Main Canal / Eluru Canal
(Location: IWMI HQ Call no: e-copy only Record No: H042291)
(0.54 MB)
The Krishna basin in South India is a fast closing basin. Consumptive water use, mainly for agriculture, accounted for 90.5% of the basin net inflow. The adjoining Godavari basin is comparatively water rich and it is planned to transfer 5325 million m3 of Godavari waters to Krishna through P-V Link. Such a transfer shall make the groundwater-irrigated area more sustainable, a part of the remaining rainfed area will come under irrigation and current benefits shall increase by 65%. MODFLOW results showed groundwater recharge increased by 28% due to supplement irrigation return flow. Annual estimated seepage from the main system was estimated at 183 million m3 per year leading to an average water table rise of 1.83 m. This is also likely to affect 16% of the command with water logging. Integrated planning of surface and groundwater resources and a scientific demand management through optimization of cropping systems have the potential to effectively harness the benefits of the river linking initiative.
3 Dewandel, B.; Perrin, J.; Ahmed, S.; Aulong, S.; Hrkal, Z.; Lachassagne, P.; Samad, Madar; Massuel, S.. 2010. Development of a tool for managing groundwater resources in semi-arid hard rock regions: application to a rural watershed in South India. Hydrological Processes, 24(19):2784–2797. [doi: https://doi.org/10.1002/hyp.7696]
(Location: IWMI HQ Call no: e-copy only Record No: H043174)
(0.33 MB)
Until recently, aquifers located in hard rock formations (granite, gneiss, schist) were considered as a highly heterogeneous media, and no adequate methodology for groundwater management was available. Recent research studies have shown that when hard rocks are exposed to regional and deep-weathering processes and when the geology is relatively homogenous, a typical hard rock aquifer is made of two main superimposed hydrogeological layers each characterized by quite homogeneous specific hydrodynamic properties: namely the saprolite and the fissured layers. Therefore, for these cases, hard rock aquifers can be considered as a multi-layered system. Based on these works, an operational decision support tool (DST-GW ) designed for the management of groundwater resources in hard rock area under variable agro-climatic conditions has been developed. The tool focuses on the impact of changing cropping pattern, artificial recharge and rainfall conditions on groundwater levels at the scale of small watersheds (10 to about 100 km2 in case well-developed weathering profile). DST-GW is based on the groundwater balance and the ‘water table fluctuation method’, which are well-adapted methods in hard rock and semiarid contexts. Based on field data from an overexploited South Indian watershed (58 km2), the model allows calibrating, at watershed scale, the variation in specific yield of the aquifer with depth, as well as the rainfall-aquifer recharge relationship. Seasonal basin-scale piezometric levels are computed with an average deviation of š0Ð56 m compared to measurements from 2001 to 2005. The model shows that, if no measure is taken, the water table depletion will induce the drying-up of most of the exploited borewells by the year 2012. Scenarios of mitigation measures elaborated with the tool show that change in cropping patterns could rapidly reverse the tendency and lead to a sustainable management of the resource. This work presents the developed tool and particularly the hydraulic model involved in and its application to a case study. However, the purpose tool is applicable at watershed scale but not design for the groundwater management of a very small area or for a single borewell.
4 George, B.; Malano, H.; Davidson, B.; Hellegers, P.; Bharati, Luna; Massuel, S.. 2011. An integrated hydro-economic modelling framework to evaluate water allocation strategies II: scenario assessment. Agricultural Water Management, 98(5):747-758. [doi: https://doi.org/10.1016/j.agwat.2010.12.005]
Water allocation ; Models ; River basins ; Economic aspects / India / Krishna River Basin / Musi River Basin
(Location: IWMI HQ Call no: PER Record No: H043545)
(1.46 MB)
In this paper the results of an assessment of the hydrological and economic implications of reallocating water in the Musi sub-basin, a catchment within the Krishna Basin in India, are reported. Policy makers identified a number of different but plausible scenarios that could apply in the sub-basin, involving; supplying additional urban demand from agricultural allocations of water, implementing a number of demand management strategies, changing the timing of releases for hydropower generation, changing the crops grown under irrigation, reducing existing stream flows and allowing for more environmental flows. The framework chosen to undertake this assessment was a simulation model that measures and compares the economic values of water allocation scenarios determined from a water allocation model that accounts for supplies of groundwater and surface water across a number of regions and over a variety of uses. Policy makers are provided with the range of measures on the security of the supply of water and the social costs and benefits of reallocating water between sectors and across regions within the sub-basin. Taking water from agriculture to supply urban users has a greater impact on irrigation supplies during dry years. It was also found that changing the allocation of water between sectors, by taking it away from agriculture had a large positive economic impact on the urban sector. Yet the costs involved in undertaking such a strategy results in a significant loss in the net present value of the scheme. Stream flow reductions, if significantly large (at around 20%), were found to have a large physical and economic impact on the agricultural sector. Implementing water saving strategies in Hyderabad was found to be more cost effective than taking water from agriculture, if rainwater tanks are used to achieve this. Changing the timing of hydropower flows resulted in best meeting of irrigation demand in NSLC and NSRC. Under this scenario, the crops grown under irrigation were found to have a significant economic impact on the sub-basin, but not as large as farmers undertaking crop diversification strategies, ones which result in farmers growing less rice. The security of supplying water to different agricultural zones has significantly improved under this scenario. Finally, releasing water for environmental purposes was found to have only a minor impact on the agricultural sector.
5 George, B.; Malano, H.; Davidson, B.; Hellegers, P.; Bharati, Luna; Massuel, S.. 2011. An integrated hydro-economic modelling framework to evaluate water allocation strategies I: model development. Agricultural Water Management, 98(5):733-746. [doi: https://doi.org/10.1016/j.agwat.2010.12.004]
Water allocation ; Models ; Economic aspects ; River basins ; Water demand / India / Krishna River Basin / Musi River Basin
(Location: IWMI HQ Call no: PER Record No: H043544)
(1.10 MB)
In this paper an integrated modelling framework for water resources planning and management that can be used to carry out an analysis of alternative policy scenarios for water allocation and use is described. The modelling approach is based on integrating a network allocation model (REALM) and a social Cost Benefit economic model, to evaluate the physical and economic outcomes from alternative water allocation policies in a river basin or sub-basin. From a hydrological perspective, surface and groundwater models were first applied to assess surface and groundwater resource availability. Then an allocation model was applied to reconcile the calculated surface and groundwater resources. From an economic perspective initially the value of water allocated to different uses in each demand centre within the system was estimated. These values were then placed in a social Cost Benefit Analysis to assess the economic consequences of different allocation scenarios over time and space. This approach is useful as it allows policymakers to consider not only the physical dimensions of distributing water, but also the economic consequences associated with it. This model is considered superior to other models as water is increasingly being seen as an economic good that should be allocated according to its value. The framework outlined in this paper was applied to the Musi sub-basin located in the Krishna Basin, India. In applying this framework it was concluded that competition for Musi water is very high, the transfer of water from agriculture to urban users is likely to grow in future and the value of water used in different agricultural zones is very low.
6 Massuel, S.; George, B. A.; Venot, J.-P.; Bharati, Luna; Acharya, S. 2013. Improving assessment of groundwater-resource sustainability with deterministic modelling: a case study of the semi-arid Musi sub-basin, South India. Hydrogeology Journal, 21:1567-1580.
Groundwater management ; Water resources ; Water supply ; Sustainability ; Arid lands ; River basins ; Aquifers ; Models ; Case studies / South India / Musi River Basin
(Location: IWMI HQ Call no: e-copy only Record No: H046196)
(1.08 MB)
Since the 1990s, Indian farmers, supported by the government, have partially shifted from surface-water to groundwater irrigation in response to the uncertainty in surface-water availability. Water-management authorities only slowly began to consider sustainable use of groundwater resources as a prime concern. Now, a reliable integration of groundwater resources for water-allocation planning is needed to prevent aquifer overexploitation. Within the 11,000-km2 Musi River sub-basin (South India), human interventions have dramatically impacted the hard-rock aquifers, with a water-table drop of 0.18m/a over the period 1989–2004. A fully distributed numerical groundwater model was successfully implemented at catchment scale. The model allowed two distinct conceptualizations of groundwater availability to be quantified: one that was linked to easily quantified fluxes, and one that was more expressive of long-term sustainability by taking account of all sources and sinks. Simulations showed that the latter implied 13% less available groundwater for exploitation than did the former. In turn, this has major implications for the existing waterallocation modelling framework used to guide decision makers and water-resources managers worldwide.
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