Agricultural water management in a water stressed catchment: Lessons from the RIPARWIN Project

Agricultural water management in a water stressed catchment: Lessons from the RIPARWIN Project

Author: McCartney, Matthew P., Lankford, B. A., Mahoo, H.

Publisher: IWMI

Published: 2007

Total Pages: 56

ISBN-13: 9290906707

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In the face of growing water stress and increasing concerns over the sustainability of water use, Tanzania has, in common with many other countries in Africa, focused largely on the development of more integrated catchment-wide approaches to water management. In the Great Ruaha River Basin, considerable effort has gone into increasing water productivity and the promotion of mechanisms for more efficient allocation of water resources. Over a period of five years, the RIPARWIN project investigated water management in the basin and evaluated the effectiveness of some of the mechanisms that have been introduced. The study findings are relevant to basins in developing countries where there is competition for water and irrigation is one of the main uses.


Evaluation of historic, current and future water demand in the Olifants River Catchment, South Africa

Evaluation of historic, current and future water demand in the Olifants River Catchment, South Africa

Author: McCartney, Matthew P., Arranz, Roberto

Publisher: IWMI

Published: 2007

Total Pages: 51

ISBN-13: 9290906723

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Water resource development has played a significant role in the expansion of agriculture and industry in the Olifants River Catchment. However, currently water deficit is one of the major constraints hampering development in the catchment; both the mining and agricultural sectors are producing below optimal levels because of their reliance on insufficient supplies. In this study, the Water Evaluation and Planning (WEAP) model was used to evaluate scenarios of historic, current and future water demand in the catchment. For each scenario, the WEAP model was used to simulate demand in five different sectors (rural, urban, mining, commercial forestry and irrigation) over a 70-year period of varying rainfall and hydrology. Levels of assured supply were estimated for each sector and the economic cost of failing to provide water was predicted. For the future scenarios, the impact of infrastructure development and water conservation measures were assessed. The study illustrates how a relatively simple model can provide useful insight for resource planning and management.


Resource Efficiency Complexity and the Commons

Resource Efficiency Complexity and the Commons

Author: Bruce Lankford

Publisher: Routledge

Published: 2013-09-05

Total Pages: 245

ISBN-13: 1134079389

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The efficient use of natural resources is key to a sustainable economy, and yet the complexities of the physical aspects of resource efficiency are poorly understood. In this challenging book, the author proposes a major advance in our understanding of this topic by analysing resource efficiency and efficiency gains from the perspective of common pool resources, applying this idea particularly to water resources and its use in irrigated agriculture. The author proposes a novel concept of "the paracommons", through which the savings of increased resource efficiency can be viewed. In effect he asks; "who gets the gain of an efficiency gain?" By reusing, economising and avoiding losses, wastes and wastages, freed up resources are available for further use by four ‘destinations’; the same user, parties directly connected to that user, the wider economy or returned to the common pool. The paracommons is thus a commons of – and competition for – resources salvaged by changes to the efficiency of natural resource systems. The idea can be applied to a range of resources such as water, energy, forests and high-seas fisheries. Five issues are explored: the complexity of resource use efficiency; the uncertainty of efficiency interventions and outcomes; destinations of freed up losses, wastes and wastages; implications for resource conservation; and the interconnectedness of users and systems brought about by efficiency changes. The book shows how these ideas put efficiency on a par with other dimensions of resource governance and sustainability such as equity, justice, resilience and access.


Changing consumption patterns: Implications on food and water demand in India

Changing consumption patterns: Implications on food and water demand in India

Author: Amarasinghe, Upali A., Shah, Tushaar, Singh, Om Prakash

Publisher: IWMI

Published: 2007

Total Pages: 48

ISBN-13: 9290906774

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Increasing income and urbanization are triggering a rapid change in food consumption patterns in India. This report assesses India’s changing food consumption patterns and their implications on future food and water demand. According to the projections made in this study, the total calorie supply would continue to increase, but the dominance of food grains in the consumption basket is likely to decrease by 2050, and the consumption of non-grain crops and animal products would increase to provide a major part of the daily calorie supply. Although the total food grain demand will decrease, the total grain demand is likely to increase with the increasing feed demand for the livestock. The implications of the changing consumption patterns are assessed through consumptive water use (CWU) under the assumptions of full or partial food self-sufficiency.


Hydrological and environmental issues of interbasin water transfers in India: a case of the Krishna River Basin

Hydrological and environmental issues of interbasin water transfers in India: a case of the Krishna River Basin

Author: Smakhtin, Vladimir, Gamage, Nilantha, Bharati, Luna

Publisher: IWMI

Published: 2007

Total Pages: 36

ISBN-13: 9290906820

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This study attempts to examine those unique aspects of interbasin water transfer planning, which are of critical importance to the sustainable water resources development in India. It focuses on the crucial aspect of accurate quantification of surface water availability, which determines the entire feasibility of a water transfer. It also illustrates the impacts of upstream water resources development on the deltas’ environment thus justifying the deltas’ environmental flow requirements. The report targets government departments, research institutions and NGOs – primarily in India and other countries of the region – which are engaged or interested in issues of interbasin water transfer and environmental water management. The research intends to: contribute to the effectiveness of water resources planning and management in India; emphasize the need for urgent improvement of access to hydrometeorological data in the country; and aim to stimulate further debate on water transfers.


Treadle pump irrigation and poverty in Ghana

Treadle pump irrigation and poverty in Ghana

Author: Adeoti, Adeoti, Barry, Boubacar, Namara, Regassa, Kamara, Abdul, Titiati, Atsu

Publisher: IWMI

Published: 2007

Total Pages: 34

ISBN-13: 9290906715

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Treadle pump (TP) technology has been promoted by Enterprise Works Worldwide (EWW) as an alternative to the traditional rope and bucket irrigation that is necessary to overcome the challenge of uncertain and inadequate rainfall for agricultural production. The aim is to improve output, increase incomes and reduce poverty among farm households. This study examines the strategies used for dissemination of the TP and the dynamics of its adoption and impacts, with a special focus on poverty reduction. The results of the study reveal that time and labor savings for irrigation, increased size of irrigated areas and lack of fuel requirements are the attractive features of the TP for those who adopt it. Adoption of TP increases land and labor productivities; and also net farm incomes. The study also demonstrates that adoption of the TP reduces poverty.


Climate change impacts on hydrology and water resources of the Upper Blue Nile River Basin, Ethiopia

Climate change impacts on hydrology and water resources of the Upper Blue Nile River Basin, Ethiopia

Author: Kim, U., Kaluarachchi, J. J., Smakhtin, V. U.

Publisher: IWMI

Published: 2008

Total Pages: 31

ISBN-13: 9290906960

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The report evaluates the impacts of climate change on the hydrological regime and water resources of the Blue Nile River Basin in Ethiopia. It starts from the construction of the climate change scenarios based on the outcomes of several general circulation models (GCMs), uses a simple hydrological model to convert theses scenarios into runoff, and examines the impacts by means of a set of indices. The results, however uncertain with existing accuracy of climate models, suggest that the region is likely to have the future potential to produce hydropower, increase flow duration, and increase water storage capacity without affecting outflows to the riparian countries in the 2050s.


Drivers and characteristics of wastewater agriculture in developing countries: results from a global assessment

Drivers and characteristics of wastewater agriculture in developing countries: results from a global assessment

Author: Raschid-Sally, L., Jayakody, P.

Publisher: IWMI

Published: 2009

Total Pages: 39

ISBN-13: 9290906987

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In 4 out of 5 cities in developing countries, wastewater is used to cultivate perishable crops for urban markets. Such practices create a health risk but provide important livelihood benefits. This study through an analysis of 53 cities in developing countries, contributes to understanding the factors that drive wastewater use. The main drivers are (1) increasing urban water demand without wastewater treatment causing pollution of irrigation water sources; (2) urban food demand favoring agriculture close to cities where water sources are polluted; and (3) lack of cheaper, similarly reliable or safer water sources. Poverty, which constrains the infrastructure needs of urbanization, is an added factor. The study makes policy recommendations stressing on, effectively applying the WHO guidelines, linking investments in water supply with sanitation for maximum beneficial impact on water pollution, and involving actors at both the national and local level, for water quality improvements and health risk reduction


Shifting Waterscapes: Explaining Basin Closure in the Lower Krishna Basin, South India

Shifting Waterscapes: Explaining Basin Closure in the Lower Krishna Basin, South India

Author: Jean-Philippe Venot

Publisher: IWMI

Published:

Total Pages: 60

ISBN-13:

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Progressive agricultural and water development in the Krishna Basin in South India has led to a rising over commitment of water resources and signs of basin closure are apparent during dry periods. As human consumptive uses are approaching the limits of water availability, this report focuses on the Lower Krishna Basin that bears the brunt of any intervention upstream. Capturing the process of basin closure requires an understanding of the political dimension of access to water and the scope for change. As basin closure intensifies the interconnectedness of ecosystems and water users, adjustments and management decisions result in spatial re-appropriation of water and basin-wide strategies for water management and development that start with the definition and the implementation of water allocation mechanisms are increasingly needed.