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.
Anicut systems in Sri Lanka: The case of the Upper Walawe River Basin
Economics and politics of water resources development: Uda Walawe Irrigation Project, Sri Lanka
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.
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.
Balancing irrigation and hydropower: Case study from Southern Sri Lanka
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.
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.
Promise, Trust and Evolution
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.
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.
Environmental Water Requirements in Mountainous Areas
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
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
Examining International Land Use Policies, Changes, and Conflicts
Author: Hasnat, G. N. Tanjina
Publisher: IGI Global
ISBN: 1799843734
Category : Political Science
Languages : en
Pages : 439
Book Description
Though conflicts continue to arise over land use and land cover changes, the conversion of forest land to cropland or other land uses such as housing and urban development have been on the rise in recent years. Decisions regarding land use and land cover influence climate change as well as various natural processes. While proper changes can minimize the effects and speed of climatic changes, the continued adverse changes may be accelerating the deterioration of the world’s condition. Examining International Land Use Policies, Changes, and Conflicts presents the latest research on the present status of land use and land cover changes throughout the world in order to determine appropriate land use policies that can protect earth’s present and future condition. The findings of the studies investigate the conflicts behind the land tenure and land uses in different countries of the world and examines existing policies and the reasons behind changes in them. Ultimately, the book provides readers with knowledge on how land can be managed in a sustained manner, how landscape models are helpful for predicting and determining future land uses, how land can be managed with the best architectural measures, and how urban forestry is helpful for better environmental management and adapting or mitigating climate change effects. Land users, agriculturalists, urban planners, policymakers, government officials, researchers, academicians, and students looking to improve their understanding of this topic for better use of land in the future will find this book to be an asset to their current research.
Publisher: IGI Global
ISBN: 1799843734
Category : Political Science
Languages : en
Pages : 439
Book Description
Though conflicts continue to arise over land use and land cover changes, the conversion of forest land to cropland or other land uses such as housing and urban development have been on the rise in recent years. Decisions regarding land use and land cover influence climate change as well as various natural processes. While proper changes can minimize the effects and speed of climatic changes, the continued adverse changes may be accelerating the deterioration of the world’s condition. Examining International Land Use Policies, Changes, and Conflicts presents the latest research on the present status of land use and land cover changes throughout the world in order to determine appropriate land use policies that can protect earth’s present and future condition. The findings of the studies investigate the conflicts behind the land tenure and land uses in different countries of the world and examines existing policies and the reasons behind changes in them. Ultimately, the book provides readers with knowledge on how land can be managed in a sustained manner, how landscape models are helpful for predicting and determining future land uses, how land can be managed with the best architectural measures, and how urban forestry is helpful for better environmental management and adapting or mitigating climate change effects. Land users, agriculturalists, urban planners, policymakers, government officials, researchers, academicians, and students looking to improve their understanding of this topic for better use of land in the future will find this book to be an asset to their current research.
Small tank cascade systems in the Walawe River 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.
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.
Irrigation Management Processes and Conditions
Author: Charles Nijman
Publisher: IWMI
ISBN: 9290901349
Category : Agricultural development projects
Languages : en
Pages : 300
Book Description
Publisher: IWMI
ISBN: 9290901349
Category : Agricultural development projects
Languages : en
Pages : 300
Book Description
Inland Fisheries in Multiple-purpose River Basin Planning and Development in Tropical Asian Countries
Author: T. Petr
Publisher: Food & Agriculture Org.
ISBN: 9789251023273
Category : Nature
Languages : en
Pages : 176
Book Description
This technical paper presents three case studies of inland fisheries in the context of a multiple-use of land and water resources in the humid tropics of Asia. Two of the three river basins are situated on islands, i.e. the Agno in the Philippines and the Mahaweli in Sri Lanka; one is on mainland Asia, i.e. the Nam Pong Basin in Thailand. Although the river basins have a number of features in common, such as, for example, their size, forest cover and population density, they differ in a number of other environmental aspects and changes induced by the development taking place in their basins. Inland fisheries in all three catchments is represented both by capture and culture components with reservoir fisheries gaining in importance. The studies have shown that while the major constraint to the riverine fisheries has been identified as being the high level of transported sediments originating from eroding lands and mine waste discharge (the Agno Basin), in the reservoirs of Nam Pong and Mahaweli basins it has been the high fishing pressure, in one case non-regulated (Nam Pong), which has caused deterioration of fish stocks. Another constraint in force until recently was of a social (religious) character (Mahaweli Basin). The three studies have shown that in most situations inland fisheries can successfully develop under conditions of the multiple use of the resource.
Publisher: Food & Agriculture Org.
ISBN: 9789251023273
Category : Nature
Languages : en
Pages : 176
Book Description
This technical paper presents three case studies of inland fisheries in the context of a multiple-use of land and water resources in the humid tropics of Asia. Two of the three river basins are situated on islands, i.e. the Agno in the Philippines and the Mahaweli in Sri Lanka; one is on mainland Asia, i.e. the Nam Pong Basin in Thailand. Although the river basins have a number of features in common, such as, for example, their size, forest cover and population density, they differ in a number of other environmental aspects and changes induced by the development taking place in their basins. Inland fisheries in all three catchments is represented both by capture and culture components with reservoir fisheries gaining in importance. The studies have shown that while the major constraint to the riverine fisheries has been identified as being the high level of transported sediments originating from eroding lands and mine waste discharge (the Agno Basin), in the reservoirs of Nam Pong and Mahaweli basins it has been the high fishing pressure, in one case non-regulated (Nam Pong), which has caused deterioration of fish stocks. Another constraint in force until recently was of a social (religious) character (Mahaweli Basin). The three studies have shown that in most situations inland fisheries can successfully develop under conditions of the multiple use of the resource.
Multiple Uses of Water in Irrigated Areas
Author: International Water Management Institute
Publisher: IWMI
ISBN: 9290903805
Category : Irrigation
Languages : en
Pages : 59
Book Description
Water is being transferred out of agriculture to meet the growing demand in other areas, often without an agreement of or compensation to farmers with irrigated land and water rights. Furthermore, there is a failure to recognize that irrigation systems supply water not only for the main fields, but also for domestic uses, home gardens, trees and other permanent vegetation, and livestock. Other productive uses include fishing, harvesting of aquatic plants and animals, and a variety of other enterprises such as brick making. In addition, irrigation systems can have a positive or negative effect on wildlife habitats. Thus, the withdrawal of water affects the rural household, rural economy, and the environment in a number of ways. This paper argues that to ensure efficient, equitable, and sustainable water use, to reduce poverty and improve the well-being of the community, irrigation and water resources policies need to take into account all uses and users of water within the irrigation system. The multiple uses of water in the Kirindi Oya irrigation system are examined in this paper. An interdisciplinary group of scientists have investigated a number of areas including water accounting, water quality, household water use, the valuing of water for alternative uses, and the complementarities, competition, and conflicts among uses and users.
Publisher: IWMI
ISBN: 9290903805
Category : Irrigation
Languages : en
Pages : 59
Book Description
Water is being transferred out of agriculture to meet the growing demand in other areas, often without an agreement of or compensation to farmers with irrigated land and water rights. Furthermore, there is a failure to recognize that irrigation systems supply water not only for the main fields, but also for domestic uses, home gardens, trees and other permanent vegetation, and livestock. Other productive uses include fishing, harvesting of aquatic plants and animals, and a variety of other enterprises such as brick making. In addition, irrigation systems can have a positive or negative effect on wildlife habitats. Thus, the withdrawal of water affects the rural household, rural economy, and the environment in a number of ways. This paper argues that to ensure efficient, equitable, and sustainable water use, to reduce poverty and improve the well-being of the community, irrigation and water resources policies need to take into account all uses and users of water within the irrigation system. The multiple uses of water in the Kirindi Oya irrigation system are examined in this paper. An interdisciplinary group of scientists have investigated a number of areas including water accounting, water quality, household water use, the valuing of water for alternative uses, and the complementarities, competition, and conflicts among uses and users.