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Author: François Molle Publisher: IWMI ISBN: 9290905220 Category : Dams Languages : en Pages : 30
Book Description
This exploratory study was designed to capture the main features of agrarian change in the upper part of the basin that depends mostly on anicuts. These anicuts amount to 59 percent of the total basin anicuts in terms of numbers, but to only 43 percent in terms of irrigated area. They are generally very old (the history of some of them goes back to 2000 years; see below) and obviously, many changes have occurred during this time. The study does not allow the reconstitution of all past transformations but offers some insight on recent changes: changes in population pressure over resources and changes in hydrology, crop choice, livelihoods and collective action. The analysis is based on exploratory surveys carried out by the authors and by students of the University of Sabaragamuwa and is not a detailed or in-depth investigation of agricultural systems in the Upper Walawe basin. However, it provides a useful outline of the situation in this part of the basin.
Author: François Molle Publisher: IWMI ISBN: 9290905220 Category : Dams Languages : en Pages : 30
Book Description
This exploratory study was designed to capture the main features of agrarian change in the upper part of the basin that depends mostly on anicuts. These anicuts amount to 59 percent of the total basin anicuts in terms of numbers, but to only 43 percent in terms of irrigated area. They are generally very old (the history of some of them goes back to 2000 years; see below) and obviously, many changes have occurred during this time. The study does not allow the reconstitution of all past transformations but offers some insight on recent changes: changes in population pressure over resources and changes in hydrology, crop choice, livelihoods and collective action. The analysis is based on exploratory surveys carried out by the authors and by students of the University of Sabaragamuwa and is not a detailed or in-depth investigation of agricultural systems in the Upper Walawe basin. However, it provides a useful outline of the situation in this part of the basin.
Author: P. G. Somaratne Publisher: IWMI ISBN: 9290905921 Category : Tanks Languages : en Pages : 48
Book Description
This report on small tank cascade systems is based on a study conducted on seven tank cascades of the Walawe river basin, one of the three main river basins in the Ruhuna benchmark basins selected by the International Water Management Institute (IWMI) for its benchmark basin study.The overall objective of this study is to document the situation of small tank cascade systems in the basin, paying special attention to their evolution under agro-ecological, socio-economic and institutional changes on an unprecedented scale in the country after the introduction of open market economic policies in the 1970s, and thereby to contribute to the existing knowledge on small tank cascades, a key feature of water resources in the Dry zone regions2 of Sri Lanka since time immemorial.
Author: Molle, Francois, Renwick, M. Publisher: IWMI ISBN: 9290905840 Category : Irrigation projects Languages : en Pages : 78
Book Description
The Uda Walawe Irrigation and Resettlement Project (UWIRP) located in the Southern dry zone of Sri Lanka was initiated in the early 1950s. The original plan for the UWIRP was a highly ambitious social, economic and physical engineering project aimed at creating a modern, profitable agriculture sector. This report examines the history of water resources development and investment decisions for the UWIRP over a period of 50 years and uncovers underlying processes that shaped the evolution of the project and highlights the limitation of viewing development as a mere set of technical and social engineering endeavors.
Author: Molle, François, Jayakody, Priyantha, Ariyaratne, Ranjith, Somatilake, H. S. Publisher: IWMI ISBN: 9290906073 Category : Irrigation Languages : en Pages : 48
Book Description
This report analyzes a case from southern Sri Lanka, where the Samanalawewa dam and the Kaltota Irrigation Scheme (KIS) compete for the water of the Walawe river. At the catchment level, it is shown that dam releases are well attuned to the needs of KIS and to the occurrences of natural runoff, and that little of the dam water is "lost" to the river.
Author: Rucha Ghate Publisher: Oxford University Press, USA ISBN: 0199213836 Category : Business & Economics Languages : en Pages : 417
Book Description
This volume examines the management of Common Property Resources, like water, forestry, and land, and is intended to provide an account of the transformation of the commons in a rapidly changing South Asia. Contributions cover a wide range of natural resources and deal with issues such as equity, efficiency, productivity, and sustainability.
Author: Smakhtin, Vladimir Publisher: IWMI ISBN: 9290906197 Category : Hydrology Languages : en Pages : 19
Book Description
Quantification of hydrological processes and water requirements of aquatic ecosystems is required for many projects related to environmental security and efficient water use in agriculture. This also applies to the Asian monsoon region. This paper focuses on the Walawe River basin, located in a semi-arid zone of southern Sri Lanka. The two major reservoirs in the upstream and middle reaches of the river with a total capacity of 486 million cubic meters (MCM) have significantly affected the hydrology of the river, with associated adverse environmental and social consequences.
Author: Elias Dimitriou Publisher: Elsevier ISBN: 0128193433 Category : Science Languages : en Pages : 384
Book Description
Environmental Water Requirements in Mountainous Areas presents comprehensive and scientifically sound approaches and methodologies for estimating the environmental water requirements and tradeoffs for water allocation by analyzing anthropogenic and natural water needs. The book covers environmental water management issues in mountainous areas, specifically focusing on the Mediterranean region which exhibits significant contrasts in its demographic and hydrologic features. The authors include paradigms and information that will be useful for water resources managers, decision makers, scientists working in the fields of ecology and water resources management, engineers that design hydraulic works, and environmental policymakers. - Offers a complete background screening on theoretical and practical guidelines on estimating environmental water requirements in mountainous areas - Promotes and guides interdisciplinary work with information on policies and best practices in the field of ecological flows and water resources management - Provides examples and case studies on the successful implementation efforts of ecological flows to analyze lessons learned and overcome practical issues and solutions
Author: François Molle
Author: François Molle
Author: G. G. de L. W. Samarasinha
Author: P. G. Somaratne
Author: Molle, Francois, Renwick, M.
Author: 
Author: Molle, François, Jayakody, Priyantha, Ariyaratne, Ranjith, Somatilake, H. S.
Author: Rucha Ghate
Author: Smakhtin, Vladimir
Author: Elias Dimitriou
Author: Shyamala Abeyratne