Sustainable intensification of groundwater irrigation in the Eastern Indo-Gangetic Plains

2021 ◽  
Author(s):  
Timothy Foster ◽  
Roshan Adhikari ◽  
Subash Adhikari ◽  
Scott Justice ◽  
Anton Urfels ◽  
...  
Keyword(s):  
Climate Change ◽  
Supply Chains ◽  
South Asia ◽  
Water Use ◽  
Agricultural Productivity ◽  
Sustainable Intensification ◽  
Adaptation To Climate Change ◽  
Gangetic Plains ◽  
Groundwater Irrigation ◽  
Near Term

<p>Groundwater irrigation has played a critical role in the Green Revolution in South Asia, helping to increase crop yields and improve livelihoods of millions of rural households. However, the spread of irrigation has not been homogeneous, with many farmers in the Eastern Indo-Gangetic Plains (EIGP – Nepal Terai and parts of eastern India) still lacking reliable and affordable irrigation access. As a result, agricultural productivity in the EIGP is some of the lowest found across South Asia, with many farmers trapped in chronic cycles of poverty and food insecurity.</p><p>A major focus of government and donor efforts to support intensification of groundwater irrigation in the EIGP has been the replacement of existing diesel-based pumping systems with alternative electric or solar powered pumping technologies. These technologies are viewed as being cheaper for to operate and less environmentally damaging due to their lower operational carbon emissions. However, scaling these technologies in practice has proved challenging due to their high upfront capital costs and the unique socio-technical constraints posed by farming systems in the EIGP (e.g., land fragmentation and poorly developed supply chains).</p><p>In response to these challenges, our research explores whether opportunities exist to make existing diesel pump systems more cost effective for farmers to support adaptation to climate change and reduce poverty. In particular, we seek to identify what factors lead to disparities in groundwater access costs for irrigation, how these disparities affect farmers’ water use behavior, and in turn how this impacts agricultural production outcomes. Our work draws on evidence from a recent survey of over 400 farmer households in the Nepal Terai, along with detailed in-situ testing and analysis of the fuel efficiency and cost-effectiveness of over 100 diesel pumpsets in the same region conducted between 2019-20.</p><p>Our results demonstrate that substantial variability exists in the costs of diesel pump irrigation in the EIGP and that higher costs of groundwater access are associated with lower levels of agricultural productivity and household income. Dependence on expensive pumpset rental markets, in particular amongst credit constrained households, is a major driver of the highest irrigation access costs. Additionally, many farmers also continue to operate and invest in pumpset models and designs that are significantly oversized for local hydrological conditions, resulting in fuel inefficiencies and excess costs that reduce the overall profitability of irrigation water use.</p><p>Our findings have important implications for national and regional policy debates about sustainable intensification of irrigated agriculture in the EIGP and other regions. We suggest that intensification of water use and improvements in agricultural productivity can be achieved in the near-term without need for radical technology changes. Targeted credit support, combined with data-driven advisories and improved supply chains for maintenance services and spare parts, could incentivize and enable adoption of low-cost fuel-efficient diesel pumpsets resulting in substantial reductions in costs of irrigation for many farmers. This would have positive near-term impacts on agricultural productivity and rural livelihoods, supporting adaptation to climate change and future transitions to alternative low-carbon irrigation technologies in the region.</p>

Options for reducing costs of diesel pump irrigation systems in the Eastern Indo-Gangetic Plains

2020 ◽  
Author(s):  
Timothy Foster ◽  
Roshan Adhikari ◽  
Subash Adhikari ◽  
Anton Urfels ◽  
Timothy Krupnik
Keyword(s):  
Management Practices ◽  
Crop Yields ◽  
Groundwater Resources ◽  
Irrigation Management ◽  
Agricultural Productivity ◽  
High Energy ◽  
Irrigation Systems ◽  
Gangetic Plains ◽  
Near Term ◽  
The Cost

<p>In many parts of South Asia, electricity for groundwater pumping has been directly or indirectly subsidised by governments to support intensification of agriculture. In contrast, farmers in large portions of the Eastern Indo-Gangetic Plains (EIGP) remain largely dependent on unsubsidised diesel or petrol power for irrigation pumping. Combined with a lack of comprehensive aquifer mapping, high energy costs of pumping limit the ability of farmers to utilise available groundwater resources. This increases exposure to farm production risks, in particular drought and precipitation variability.</p><p>To date, research to address these challenges has largely focused on efforts to enhance rural electrification or introduce renewable energy-based pumping systems that remain out of reach of many poor smallholders. However, there has been comparatively little focus on understanding opportunities to improve the cost-effectiveness and performance of the thousands of existing diesel-pump irrigation systems already in use in the EIGP. Here, we present findings from a recent survey of over 432 farmer households in the mid-western Terai region of Nepal – an important area of diesel-pump irrigation in the EIGP. Our survey provides information about key socio-economic, technological and behavioral aspects of diesel pump irrigation systems currently in operation, along with quantitative evidence about their impacts on agricultural productivity and profitability.</p><p>Survey results indicate that groundwater irrigation costs vary significantly between individual farmers. Farmers faced with higher costs of groundwater access irrigate their crops less frequently, which in turn results in lower crop yields and reduced overall farm profitability. Our data indicate that pumpset fuel efficiency may be a key driver of variability in irrigation costs, with large horsepower (>5 HP) Indian-made pumpsets appearing to have significantly higher fuel consumption rates (1.10 litre/hour and $18,000) and investments costs than alternative smaller horsepower (<5 HP) Chinese-made pumpsets (0.76 litre/hr and $30,000). Despite this, the majority of farmers continue to favour Indian pumpsets due to their higher reliability and well-established supply chains. Variability in access costs is also related to differences in capacity of farmers to invest in their own pumping systems. Pumpset rental rates in the region increase irrigation costs by a factor of 3-4 relative to the cost of fuel alone. Furthermore, rental rates typically are structured on a per-hourly basis, further exacerbating access costs for farmers with low yielding wells or whose irrigation management practices are less efficient.</p><p>Our findings highlight that opportunities exist to reduce costs of groundwater use in existing diesel irrigation systems through improved access to more energy efficient pumping systems. This would have positive near-term impacts on agricultural productivity and rural livelihoods, in particular helping farmers to more effectively buffer crops against monsoonal variability. Such near-term improvements in diesel pump irrigation systems would also play an important role in supporting agriculture in the EIGP to transition to more sustainable and clean sources of energy for irrigation pumping. However, efforts to enhance irrigation access must also occur alongside improvements to aquifer monitoring and governance of extraction, in order to minimise risks of future depletion such as observed in other parts of the IGP.</p>

Interdisciplinary collaboration and joint knowledge production in climate change adaptation in mountain regions in South Asia, Latin America and Switzerland

2020 ◽  
Author(s):  
Christian Huggel ◽  
Veruska Muccione ◽  
Keyword(s):  
Climate Change ◽  
South Asia ◽  
Knowledge Production ◽  
Climate Adaptation ◽  
Interdisciplinary Collaboration ◽  
A Priori ◽  
Solution Space ◽  
Climate Impacts ◽  
Adaptation To Climate Change ◽  
Joint Knowledge Production

<p>The level of already committed climate change implies massive impacts and risks to natural and human systems on the planet which probably have been underestimated so far, as recent research and science-policy assessments such as from the IPCC indicate. Scenarios with less stringent emission reduction pose even greater risks of partly unknown dimensions. Adaptation to climate change is therefore of critical importance, in particular for countries with low adaptive capacity where climate change can seriously undermine efforts for sustainable development. Mountains are among the hotspots of climate impacts and adaptation.</p><p>Climate adaptation is fundamentally an interdisciplinary and transdisciplinary endeavor. Various sources of knowledge and perspectives need to be considered and integrated to produce actionable and solution-oriented knowledge. While experiences on joint knowledge production (JKP) has been increasing over recent years there is still missing clarity how to design and implement such a process in the context of climate adaptation.</p><p>Here we analyze experiences from a new initiative and network of climate adaptation in education and research with institutions from South Asia, the Andes and Central America, and Switzerland (knowledgeforclimate.net). Partners form a highly multi-disciplinary network with diverse cultural and institutional backgrounds which is both an important asset and challenge for interdisciplinary collaboration. A core of the collaboration are case studies conducted in all six countries in mountain contexts which are developed considering different disciplinary perspectives and represent the basis for both research and teaching. JKP takes place at different levels which need to be systematically and carefully analyzed. </p><p>We find that the processes of JKP are diverse, complex, and highly dependent on the interests and roles of actors within a network. To keep such processes alive, signposts in form of analysis and intermediary products along the network lifetime should be positioned as means of stocktaking and monitoring for the future.</p><p>We suggest that existing models of JKP need to be broadened to better accommodate the high diversity and non-linearity of JKP processes. JKP does not just happen as a product of interdisciplinary collaboration but needs continuous reflection, research, update and upgrade. Trust and a range of common interests among partners in the network have been identified as key aspects in the process. A particular challenge furthermore is to dedicate enough time and resources to the framing process but then clearly moving beyond into the action and solution space. Harmonizing different forms of knowledge pertinent to climate adaptation in mountains and harvesting the diversity while accepting possibly limited consensus is essential, yet, it is not a priori predictable where this balance lies.</p>

scholarly journals Development of water use scenarios as a tool for adaptation to climate change

2013 ◽  
Vol 6 (1) ◽  
pp. 61-68 ◽  
Author(s):  
R. Jacinto ◽  
M. J. Cruz ◽  
F. D. Santos
Keyword(s):  
Climate Change ◽  
Land Use ◽  
Land Use Change ◽  
Water Use ◽  
Adaptation Strategy ◽  
Adaptation To Climate Change ◽  
Intergovernmental Panel ◽  
Land Use Scenarios ◽  
Technological Developments ◽  
Emissions Scenarios

Abstract. The project ADAPTACLIMA, promoted by EPAL, the largest Portuguese Water Supply Utility, aims to provide the company with an adaptation strategy in the medium and long term to reduce the vulnerability of its activities to climate change. We used the four scenarios (A1, A2, B1, B2) adopted in the Special Report Emissions Scenarios (SRES) of the IPCC (Intergovernmental Panel on Climate Change) to produce local scenarios of water use. Available population SRES for Portugal were downscaled to the study area using a linear approach. Local land use scenarios were produced using the following steps: (1) characterization of the present land use for each municipality of the study area using Corine Land Cover and adaptation of the CLC classes to those used in the SRES; (2) identification of recent tendencies in land use change for the study area; (3) identification of SRES tendencies for land use change in Europe; and (4) production of local scenarios of land use. Water use scenarios were derived considering both population and land use scenarios as well as scenarios of change in other parameters (technological developments, increases in efficiency, climate changes, or political and behavioural changes). The A2 scenario forecasts an increase in population (+16%) in the study area while the other scenarios show a reduction in the resident population (−6 to 8%). All scenarios, but especially A1, show a reduction in agricultural area and an increase in urban area. Regardless of the scenario, water use will progressively be reduced until 2100. These reductions are mainly due to increased water use efficiency and the reduction of irrigated land. The results accord with several projects modelling water use at regional and global level.

scholarly journals Intervention of Climate Smart Technologies for Improving Water Productivity in an Enormous Water Use Rice-Wheat System of South-Asia

2019 ◽  
Vol 75 ◽  
pp. 27-35 ◽  
Author(s):  
Akbar Hossain ◽  
Rajan Bhatt
Keyword(s):  
Climate Change ◽  
South Asia ◽  
Water Use ◽  
Short Duration ◽  
Water Productivity ◽  
Soil Health ◽  
Cropping System ◽  
Micronutrient Deficiencies ◽  
Land Leveling ◽  
Smart Technologies

I Intensively practices rice-wheat (R-W) cropping system (RWCS) in South-Asia is suffering from many sustainability issues such as micronutrient deficiencies, labour scarcity, production cost, declining land, declining groundwater level and water productivity along with declining soil health.  Climate change further complex the things in one or other way. Therefore, the intervention of climate smart technologies are urgent for improving water productivity in an enormous water use RWCS of South-Asia. Although, farmers are confused regarding picking of suitable climate smart technology (CST) viz., laser land leveling, un-puddled direct-seeded rice (UPDSR), soil matric potential based irrigation, double zero tillage in wheat followed by rice, raised bed planting, short duration cultivars and correct transplantation time, for enhancing their livelihoods through increasing land and water productivity on one side and mitigating global warming consequences on other. Performance of these technologies is both site and situation specific, and care must be taken in practicing them. Most of them cutting down the drainage losses, which further reduces recharging of soil profile which is not required in water stressed regions while these might be termed as energy-saving technologies; otherwise used to withdraw water from the deeper soil depths. These CST are also useful for waterlogged regions. However, CST viz. correct transplantation time and short duration cultivars partition higher fraction of ET water (evapotranspiration) from E (evaporation) to T (transpiration) component which further favour higher grain yields and thus, higher water productivity. Therefore, it is crucial for the introduction of CST for improving agricultural and water productivity in the era of climate change in an enormous water use RWCS of South-Asia.

Climate Change, California Wine, and Wildlife Habitat

2014 ◽  
Vol 11 (1) ◽  
pp. 69-87 ◽  
Author(s):  
Patrick R. Roehrdanz ◽  
Lee Hannah
Keyword(s):  
Climate Change ◽  
Water Use ◽  
Water Conservation ◽  
Native Species ◽  
Climate Models ◽  
Global Climate Models ◽  
Wildlife Habitat ◽  
Adaptation To Climate Change ◽  
Wine Production ◽  
Important Species

AbstractClimate change may drive shifts in global agriculture that will affect remaining natural lands, with important consequences for the conservation of species and ecosystems. Wine production is an excellent model for examining this type of impact, because suitable climate is central to product quality and production is centered in Mediterranean climate regions that are all global biodiversity hotspots. Adaptation to climate change in existing vineyards may involve water use to ameliorate heat stress or drought, resulting in additional conservation issues. Global studies of wine, climate, and conservation have highlighted the need for more detailed regional analyses to better understand these complex multiple issues. Here we examine impacts of climate change on winegrape suitability in California and its possible implications for nature conservation and water use. Under two global climate models and two emissions scenarios, winegrape suitability in California is projected to decline overall and to move into undeveloped areas that provide important habitats for native species. Coastal and upslope areas retain and improve in suitability, respectively, while inland areas see the largest losses in suitability. Areas of declining suitability are regions in which heightened water use for vineyard adaptation may lead to declines in stream flow or conflicts with other water uses. Continued growth in global demand for wine and reduced production in areas of declining suitability will drive expansion into newly suitable areas, potentially impacting important species native to California. Existing vineyards in areas of declining suitability will likely need to adapt to remain viable. Advance planning for a changing climate and adaptation options that are not water intensive (e.g. vine orientation, trellising, or varietal switch) will help reduce potential water conservation issues in those areas. (JEL Classifications: Q15, Q54, Q57)

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