Download or read book A diagnostic model framework for water use in rice based irrigation systems written by Wilfried Hundertmark and published by IWMI. This book was released on 2003 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt: The paper presents a framework for water use in rice-based irrigation systems, which is based on linear programming (LP). This framework intends to facilitate improved understanding of a system's internal and external conditions and the constraints to productive use of the available land and water resources, and thereby create a reference for the assessment of the physical, economic and environmental performance of a given system. The framework is conceived as a tool that is used interactively in technical group sessions with farmers, system operators and extension workers, where structured discussions lead to improved data confidence, and understanding of complex irrigation systems.
Download or read book Strategies for the Management of Conjunctive Use of Surface Water and Groundwater Resources in Semi arid Areas written by Asad Sarwar Qureshi and published by IWMI. This book was released on 2004 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to inadequate rainfall, groundwater has acquired a vital role in the development of Pakistan's agricultural economy. However, a lack of awareness concerning the use of groundwater, either by itself or combined with canal water, has added large amounts of salt to the soil. As a result, large tracts of irrigated lands are already salinized, while many others are under threat. This report presents the results of a modeling study carried out to evaluate the long-term effects of a different quality of irrigation water on root zone salinity. The simulations were performed for the Rechna Doab (sub basin of the Indus Basin) in Pakistan, by using 15 years of actual rainfall and climatic data.
Download or read book Sustainable Irrigation Development in the White Volta sub Basin written by Eric Antwi Ofosu and published by CRC Press. This book was released on 2011-12-16 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sub-Saharan Africa has an irrigation potential of about 42 million hectares of which only 17% is developed. Despite several investments in irrigation the growth is slow. This study aims at helping to achieve sustainable irrigation in sub-Saharan Africa, through gaining a better understanding of productive irrigation water use and effective management of irrigation development. The study is conducted in the White Volta sub-basin specifically in Northern Ghana and Southern Burkina Faso which have been experiencing rapid irrigation development since the mid 1990s. The study identified growing markets for irrigated products as an important driving force behind the expansion of irrigation which has given rise to new technologies. The new technologies have spread because they gave farmers direct control over water sources. These new technologies allow relatively small farm sizes which can be adequately managed by the surveyed farmers. As a result high productivities are achieved. The hydrological impact of upscaling irrigation in the sub-basin is sustainable and will maximize the overall benefits derived from water resources in the Volta Basin.
Download or read book Simulating the hydrology of small coastal ecosystems in conditions of limited data written by Smakhtin, Vladimir U., Piyankarage, Sujeewa C., Stanzel, P., Boelee, Eline and published by IWMI. This book was released on 2004 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The impacts of water resources and irrigation development need to be quantified in order to understand the environmental costs of such development activities. Complex data-intensive simulation methods are normally used for this purpose in the developed world. However, lack of reliable data prohibits the use of such models in developing countries where it is more practical to apply models with less data requirements. The report illustrates three applications of simple and pragmatic simulation models to small coastal water bodies in Sri Lanka and South Africa.
Download or read book Small dams and social capital in Yemen How assistance strategies affect local investment and institutions written by Vermillion, Douglas Lynn, Al-Shaybani, S. and published by IWMI. This book was released on 2004 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report examines the development of eight small dam projects in the mountainous province of Al-Mahweet in north-central Yemen. The report also investigates how external assistance affects incentives for local people to invest in dam development and water delivery systems and also to create rules, property rights and institutional arrangements to manage the dam and water.
Download or read book Irrigation System Performance Assessment and Diagnosis written by H. Murray-Rust and published by IWMI. This book was released on 1993 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt: Irrigation system performance assessment and diagnosis. performance, performance indicators and performance frameworks. Design-management environments and irrigation system management objectives. Performance in fixed division systems. Performance in gated division systems. Lessons learned from the case studies. Proposition for improving performance. Sustaining irrigation performance.
Download or read book Annual Report written by International Water Management Institute and published by . This book was released on 2006 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Method to Identify and Evaluate the Legal and Institutional Framework for the Management of Water and Land in Asia written by Ian Hannam and published by IWMI. This book was released on 2003 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: By determining the capacity of relevant international, national and regional legislation to support sustainable use of water and land, planners, legislative drafters and policymakers have a basis for recommending legal and institutional reform. This report, based on an investigation into existing water- and land- management laws and issues in three countries in the region, offers a methodology that can be used for such evaluations.
Download or read book An assessment of small scale users inclusion in large scale water user associations of South Africa written by Faysse, Nicolas and published by IWMI. This book was released on 2004 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt: The management of water resources is being transformed in South Africa. All water users, especially the small-scale ones, are now invited to participate in this movement. This report reviews the process of inclusion of small-scale users in the new large-scale Water User Associations (WUA).Considering the difficulties encountered in this process, this report also recommend external monitoring after the transformation of an Irrigation Board into a WUA. This method may also facilitate assessment of the inclusion of small-scale users into catchment management agencies, and water resource management organizations.
Download or read book Strategic analysis of water institutions in India Application of a new research paradigm written by Saleth, Rathinasamy Maria and published by IWMI. This book was released on 2004 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: The overall objective of this paper is to outline the analytical framework and theoretical approach underlying a new research paradigm and illustrate how this paradigm can be used for the strategic analysis of water institutions by applying it to the Indian context.
Download or read book Irrigation Kuznets Curve governance and dynamics of irrigation development A global cross country analysis from 1972 to 1991 written by Madhusudan Bhattarai and published by IWMI. This book was released on 2004 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using a global analysis across 66 countries, this study empirically validates the presence of an Environmental Kuznets Curve (EKC) relationship for irrigation development. The resulting inverted U-shaped relationship between the level of irrigation and income implies that, water uses in irrigation and agriculture are considered more important in the early stage of development of a society. Once the economy grows, however, the relative importance of irrigation and water uses in agriculture declines, compared to water uses in other sectors.
Download or read book Prospects for adopting system of rice intensification in Sri Lanka A socioeconomic assessment written by Namara, Regassa E., Weligamage, Parakrama, Barker, Randolph. and published by IWMI. This book was released on 2003 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today, there is an increasing worldwide interest in assessing the potential for maintaining or increasing rice yields by reducing or eliminating the use of chemicals and by decreasing irrigation requirements. The System of Rice Intensification (SRI) first developed in Madagascar and now being tested in many countries, is an example of such an approach. The system is based largely on organic farming principles and additional requirements for spacing and the transplanting of seedlings.
Download or read book Spatial Variation in Water Supply and Demand Across River Basins of India written by Upali Amarasinghe and published by IWMI. This book was released on 2005 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: India is a large country with regional differences in per-capita water supply and demand. Attempts to describe the water situation in India at a national level are often misleading due to the tremendous diversity in the water situation across the country. This Report analyzes the spatial variation of water supply and demand across river basins in India. The study identifies basins that are water-scarce because of inadequate water availability to meet the effective demand. It also identifies issues that are important for estimating the future water demand and for the formation of policy for future water-resources development and management.
Download or read book The Use of Remote Sensing Data for Drought Assessment and Monitoring in Southwest Asia written by Prasad Srinivasa Thenkabail and published by IWMI. This book was released on 2004 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the development of the near real-time drought monitoring and reporting system for the region, which currently includes Afghanistan, Pakistan and western parts of India. The system is based on drought-related indices derived from high-resolution remote-sensing data (MODIS). The unique feature of the study is the development of regression relationships between drought-related indices obtained from MODIS and AVHRR data, which have different pixel-resolution and optical characteristics. The goal is to make the system available, via Internet, to all stakeholders in the region.
Download or read book Inadequacies in the water reforms in the Kyrgyz Republic An institutional analysis written by Ul Hassan, Mehmood Starkloff, R., Nizamedinkhodjaeva, Nargiza and published by IWMI. This book was released on 2004 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report analyzes the evolving water-management institutions and their performance of five core water management functions, in the context of the ongoing economic and agrarian reform in the Kyrgyz Republic. These core water-management functions are, operation of water systems, maintenance, resource mobilization, conflict resolution and organizational management. The report also identifies key issues and challenges that constrain effective stakeholder participation in water-resources management.
Download or read book Water Management in Irrigated Rice written by B. A. M. Bouman and published by Int. Rice Res. Inst.. This book was released on 2007 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Realizing Africa s Rice Promise written by Marco C S Wopereis and published by CABI. This book was released on 2013-10-16 with total page 485 pages. Available in PDF, EPUB and Kindle. Book excerpt: At a time when Africa's food security stands threatened, Realizing Africa's Rice Promise provides a comprehensive overview of state-of-the-art research and recommendations for dealing with future challenges. With contributions from the key scientists working on rice in Africa, this volume addresses policy, genetic diversity and improvement, sustainable productivity enhancement, innovations and value chains. The book is useful for researchers, policy makers, agricultural ministries, donors, regional and sub-regional organizations, non-governmental development organizations and universities.
