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Registros recuperados: 58
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2nd Forum on Irrigation and water for sustainable development: 15 –16 December, 2008 Ghion Hotel, Addis Ababa, Ethiopia AgEcon
Awulachew, Seleshi Bekele; Erkossa, Teklu; Balcha, Yodit.
Tipo: Presentation Palavras-chave: Sustainable development; Irrigation management; Irrigation water; Irrigated farming; Irrigation systems; Supplemental irrigation; Land management; Land use; Investment; Case studies; Government policy; Rural poverty; Groundwater; Small scale systems; Socioeconomic development; Economic aspects; Economic growth; Income; Water management; Water resources development; Water harvesting; Water supply; Public policy; Agricultural production; Developing countries; Public-private cooperation; History; Case studies; River basins; Crop production; Agricultural and Food Policy; Agricultural Finance; Crop Production/Industries; Farm Management; Financial Economics; Food Security and Poverty; Institutional and Behavioral Economics; Land Economics/Use; Production Economics; Public Economics; Research and Development/Tech Change/Emerging Technologies; Research Methods/ Statistical Methods; Resource /Energy Economics and Policy.
Ano: 2008 URL: http://purl.umn.edu/118411
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Accounting for water use and productivity AgEcon
Molden, David J..
This paper presents a conceptual framework for water accounting and provides generic terminologies and procedures to describe the status of water resource use and consequences of water resources related actions. The framework applies to water resource use at three levels of analysis: a use level such as an irrigated field or household, a service level such as an irrigation or water supply system, and a water basin level that may include several uses. Water accounting terminology and performance indicators are developed and presented with examples at all the three levels. Concepts and terminologies presented are developed to be supportive in a number of activities including: identification of opportunities for water savings and increasing water...
Tipo: Book Palavras-chave: Water management; Irrigation management; Water supply; Terminology; Performance indexes; Water use; Water allocation; Productivity; Water balance; Crop Production/Industries; Farm Management; Productivity Analysis.
Ano: 1997 URL: http://purl.umn.edu/113623
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Agrometeorological conditions in western Pará compared to agricultural production variables using principal component analysis. Repositório Alice
NASCIMENTO, W.; MARTORANO, L. G.; ARAÚJO, L. B. de; SOUSA, J. T. R. de; DIAS, C. T. dos S..
Description of the subject. Since the beginning of the twenty-first century, soybean cultivation areas have been expanding in the Legal Amazon. Among the factors that contribute to the process of expansion of cultivation of grains in the Amazon, favorable climate conditions are one of the most important, and these include high rainfall indices and good thermal regimes during the cultivation period. Objectives. In this context, the objective of this study was to describe responses of soybean production as a function of climate variables, considering data from an important grain production center in the Amazon. Method. Principal Component Analysis (PCA) was used including the following response variables: rainfall (R), air temperature (T), real...
Tipo: Artigo de periódico Palavras-chave: Glycine Max; Evapotranspiração; Abastecimento de Água; Evapotranspiration; Water supply; Amazonia.
Ano: 2023 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1154133
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Assessment of performance and impact of irrigation and water resources systems in Taiwan and Sri Lanka: Final report AgEcon
Sakthivadivel, Ramasamy; Aloysius, Noel; Matsuno, Yutaka.
Tipo: Working or Discussion Paper Palavras-chave: Irrigation systems; Water scarcity; Water allocation; Water supply; Water quality; Water distribution; Decision making; Water management; Regression analysis; Performance evaluation; Sustainability; Irrigated farming; Agricultural development; Farm size; Irrigation management; Farmers' associations; Rain; Paddy cultivation; Crop yield; Costs; Productivity; Crop Production/Industries; Farm Management; Productivity Analysis; Resource /Energy Economics and Policy.
Ano: 2001 URL: http://purl.umn.edu/92774
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Capacity building for participatory irrigation management in Sindh Province of Pakistan. AgEcon
Memon, Yameen; Talpur, Mustafa; Murray-Rust, Hammond.
Tipo: Working or Discussion Paper Palavras-chave: River basins; Institutions; Organizations; Private sector; Public sector; Local government; Mapping; Water resource management; Water policy; Legislation; Rural women; Constraints; Groundwater; Surface water; Water quality; Water use; Water users; Dams; Reservoirs; Large-scale systems; Irrigation management; Industrialization; Case studies; Operations; Maintenance; Canals; Conflict; Farmer-agency interactions; Policy; Water supply; Rural development; Community/Rural/Urban Development; Farm Management; Institutional and Behavioral Economics; Research and Development/Tech Change/Emerging Technologies; Research Methods/ Statistical Methods; Resource /Energy Economics and Policy.
Ano: 2001 URL: http://purl.umn.edu/92769
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Changes in water duties and their impact on agricultural production: the case of Girsal Minor AgEcon
Strosser, Pierre; Afaq, Rana M.; Garces, Carlos.
Tipo: Working or Discussion Paper Palavras-chave: Irrigation management; Canal irrigation; Water supply; Water management; Watercourses; Tube wells; Agricultural production; Crop yield; Wheat; Crop Production/Industries; Farm Management; Production Economics.
Ano: 1993 URL: http://purl.umn.edu/114046
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China’s water pricing reforms for irrigation: effectiveness and impact AgEcon
Liao, Yongsong; Gao, Zhanyi; Bao, Ziyun; Huang, Qingwen; Feng, Guangzhi; Xu, Di; Cai, Jiabin; Han, Huijing; Wu, Weifeng.
Irrigation occupies a central position in China’s crop production. However, due to low per capita water resources, much worse, unevenly distributed over regions and time and the rapid increase of water diversions to non-irrigation sectors, irrigation water shortages have become a very serious problem. Without the adoption of effective measures this problem may even threaten China’s food security. Currently, irrigation efficiency is very low in general, irrigation water prices cannot fully recover water supply costs, and irrigation facilities are aging due to the lack of funding for O&M (operation & maintenance). Since water prices are regulated by the government, and not determined by the market, water prices did not work effectively in water...
Tipo: Working or Discussion Paper Palavras-chave: Water rates; Pricing; Price policy; Cost recovery; Farmers attitudes; Water rights; Water market; Water supply; User charges; Irrigation water; Water allocation; Irrigation management; Participatory management; Water conservation; Institutions; Organizations; Water users associations; Cereals; Yields; Models; Labor; Cost benefit analysis; Irrigation requirements; Investment; Groundwater management; Wells; Irrigation canals; Food security; Legal aspects; Crop Production/Industries; Farm Management; Food Security and Poverty; Production Economics; Resource /Energy Economics and Policy.
Ano: 2008 URL: http://purl.umn.edu/91872
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Cities versus agriculture: Revisiting intersectoral water transfers, potential gains and conflicts AgEcon
Molle, Francois; Berkoff, Jeremy.
Tipo: Report Palavras-chave: Water scarcity; Water demand; Water transfer; Water use; Water supply; Water allocation; Environmental effects; Water market; Community/Rural/Urban Development; Crop Production/Industries; Demand and Price Analysis; Environmental Economics and Policy; Farm Management; Land Economics/Use; Production Economics; Productivity Analysis; Risk and Uncertainty.
Ano: 2006 URL: http://purl.umn.edu/91817
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Crescimento inicial do meloeiro frente às mudanças climáticas. Repositório Alice
ARAUJO, L. F. de.
O cenário futuro de mudanças climáticas, principalmente no semiárido nordestino, incluindo a elevação da temperatura e da concentração de CO2, diminuição da disponibilidade hídrica e desertificação, ocasionando salinização da água e do solo, poderá causar impacto no manejo do meloeiro. Dessa forma, objetiva-se avaliar o crescimento inicial de plantas de meloeiro frente às mudanças na concentração de CO2, temperatura, salinidade e lâminas de irrigação, visando verificar os impactos da mudança climática sobre a cultura, como também elucidar mecanismos de tolerância, de forma a auxiliar na obtenção de materiais mais produtivos. Dois experimentos foram realizados na Embrapa Semiárido (Petrolina ? PE) e outros dois foram conduzidos na Embrapa Agroindústria...
Tipo: Teses Palavras-chave: Elevada concentração de dióxido de carbono; Altas temperaturas; Melão; Salinidade; Melons; Water supply; Salinity.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1105112
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Developing effective institutions for water resources management: A case study in the Deduru Oya Basin, Sri Lanka AgEcon
Somaratne, Pallewatte G.; Jinapala, Kiribandage; Perera, L.R.; Ariyaratne, Badugodahewa Ranjith; Bandaragoda, Don Jayatissa; Makin, I.W..
Tipo: Working or Discussion Paper Palavras-chave: River basins; Water resource management; Water lifting; Wells; Domestic water; Population; Economic aspects; Income; Irrigation programs; Institutions; Policy; Groundwater; Agricultural development; Fish farming; Pumps; Ecology; Water supply; Drought; Poverty; Land use; Water scarcity; Natural resources; Agricultural production; Cropping systems; Agricultural and Food Policy; Agricultural Finance; Consumer/Household Economics; Crop Production/Industries; Food Security and Poverty; Institutional and Behavioral Economics; Land Economics/Use; Political Economy; Production Economics; Public Economics; Resource /Energy Economics and Policy.
Ano: 2003 URL: http://purl.umn.edu/92665
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Development and evaluation of a regional water poverty index for Benin AgEcon
Heidecke, Claudia.
The paper discusses the application of the Water Poverty Index (WPI) as a monitoring tool for Benin’s water sector. Benin is currently in a process of political decentralization shifting responsibility for and administration of rural water supplies from the national to the communal level. Appropriate indicators are needed for monitoring and analyzing the progress of the water sector for each community. The Water Poverty Index allows monitoring of a combination of aspects affecting rural water management, including water sources, access to and use of water, human capacity to manage water, and environmental impacts. The application of this index is tested for Benin at the regional level. A series of variables have been chosen for inclusion into the index...
Tipo: Report Palavras-chave: Water poverty index; Water supply; Decentralization; Resource /Energy Economics and Policy.
Ano: 2006 URL: http://purl.umn.edu/55413
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Dublin Ireland: a city addressing challenging water supply, management, and governance issues Ecology and Society
Kelly-Quinn, Mary; School of Biology & Environmental Science, University College Dublin; mary.kelly-quinn@ucd.ie; Blacklocke, Sean; School of Civil, Structural & Environmental Engineering, University College Dublin; sean-blacklocke@sean-blacklocke.com; Bruen, Michael; School of Civil, Structural & Environmental Engineering, University College Dublin; michael.bruen@ucd.ie; Earle, Ray; International Water Association; rayearlewater@gmail.com; O'Neill, Eoin; School of Geography, Planning & Environmental Policy, University College Dublin; eoin.oneill@ucd.ie; O'Sullivan, John; School of Civil, Structural & Environmental Engineering, University College Dublin; jj.osullivan@ucd.ie; Purcell, Patrick; School of Civil, Structural & Environmental Engineering, University College Dublin; pj.purcell@ucd.ie.
Tipo: Peer-Reviewed Reports Palavras-chave: Demand management; Dublin; Full cost recovery; Governance; Water supply.
Ano: 2014
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Economic analysis of water supply cost structure in the Middle Olifants sub-basin of South Africa AgEcon
Tsegai, Daniel W.; Linz, Teresa; Kloos, Julia.
Using data gathered from the National Treasury of South Africa, we examine the structure of water supply costs and tariffs of Water Service Authorities (WSAs) in the Middle Olifants sub-basin of South Africa. Using the translog cost function method, the marginal cost of water supply and economies of scale are estimated. Comparison of tariffs and marginal costs show that the estimated marginal cost is higher than the actual tariff paid by consumers. This implies that WSAs in the Middle Olifants are not charging enough to recover the costs of the water services. Thus, among other things, pricing of water at its marginal cost would partly assist in solving the cost recovery problem. Raised tariffs would in turn contribute to improved efficiency of water use....
Tipo: Working or Discussion Paper Palavras-chave: Translog cost function; Water supply; Water Service Authority; Middle Olifants; South Africa; Environmental Economics and Policy.
Ano: 2009 URL: http://purl.umn.edu/49926
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Economic Impacts of Reduced Delta Exports Resulting from the Wanger Interim Order for Delta Smelt AgEcon
Sunding, David L.; Ajami, Newsha K.; Hatchett, Steven; Mitchell, David; Zilberman, David.
Tipo: Working or Discussion Paper Palavras-chave: Water transfers; Water supply; Water demand; Water conservation; Water policy; Environmental Economics and Policy; Research Methods/ Statistical Methods.
Ano: 2009 URL: http://purl.umn.edu/51558
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ECONOMIC VALUATION OF SOME WETLAND OUTPUTS OF MUD LAKE, MINNESOTA-SOUTH DAKOTA AgEcon
Roberts, Lisa A.; Leitch, Jay A..
The objective of this study was to estimate some economic values of Mud Lake, a managed, lacustrine wetland on the Minnesota-South Dakota border. Several outputs of Mud Lake were identified and an economic value was estimated for each. Flood control was valued at approximately $440 per acre, based on dollar damages prevented; water supply, using public utility revenues, was valued at $94 per acre; fish/wildlife habitat, recreation, and aesthetics were valued at about $21 per acre using the Contingent Valuation Method; and corrective expenditures were used to evaluate water quality at a negative per acre value of $180. When capitalized at 6 percent, the estimated total annual value of these four outputs is $6,250 per acre. These values can assist...
Tipo: Working or Discussion Paper Palavras-chave: Wetland; Outputs; Economic valuation; Flood control; Water supply; Water quality; Recreation; Aesthetics; Fish/wildlife habitat; Contingent valuation method; Resource /Energy Economics and Policy; Land Economics/Use.
Ano: 1997 URL: http://purl.umn.edu/23406
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Economies of Scale and Technical Efficiency in Community Water Systems AgEcon
Shih, Jhih-Shyang; Harrington, Winston; Pizer, William A.; Gillingham, Kenneth.
In this study we use datasets from the 1995 and 2000 Community Water Supply surveys to examine the production costs of water supply systems. We first estimate the economies of scale in water supply by estimating the total unit cost as well as individual component cost elasticities. For total unit cost elasticity, we find that a 1% increase in production reduces unit costs by a statistically significant 0.16%. For individual component cost elasticities, we find that higher economies of scale exist in capital costs, outside costs, other costs, and materials costs; labor costs and energy costs exhibit lower but still positive economies of scale. These economies of scale may reflect production economies or suggest that larger systems are better than smaller...
Tipo: Working or Discussion Paper Palavras-chave: Small water systems; Water supply; Capacity development; Economies of scale; Community water systems; Resource /Energy Economics and Policy; Q25; Q28.
Ano: 2004 URL: http://purl.umn.edu/10788
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Efeitos da disponibilidade hídrica e de potássio na alocação de carbono em plantas de eucalipto marcadas com 13C-CO2. Repositório Alice
FURLAN, G.; CABRAL, O. M. R.; LACLAU, J.-P.; PACKER, A. P.; MAXIMILIANO, V. C. B.; MOREIRA, M..
Resumo: Neste trabalho são apresentados os resultados da alocação do carbono (C) recentemente assimilado em árvores de eucalipto submetidas a diferentes tratamentos com relação à disponibilidade hídrica (chuva normal e exclusão de 33%) e fertilização de potássio (0 e 4,5 Kmol ha-1 na forma de KCl), utilizando-se o método da marcação com 13C-CO2 (13C pulse labelling). Observou-se que o aumento da velocidade de crescimento das árvores aumenta a partição do C fixado na madeira e a implicação prática desta constatação, considerando-se a produção de uma quantidade fixa de madeira, é que o consumo de recursos será menor maximizando-se a produtividade numa pequena área, ao contrário de plantações pouco produtivas ocupando áreas maiores. Abstract: This work...
Tipo: Separatas Palavras-chave: Disponibilidade hídrica; Carbono; Eucalipto; Disponibilidade de água; Potássio; Carbon; Eucalyptus; Water supply; Potassium.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1006550
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Effect of water supplied to Bogor no.2 corn and Hegari no.13 at Mae Klong Yai Irrigation Experiment Station, 1974 dry season Thai Agricultural
Pradit Ritruengdet.
6 tables
Palavras-chave: Corn; Maize; Sorghum; Water supply; Bogor no.2; Hegari no.13; Varieties; Mae Klong Yai irrigation; Dry season; Yields; ข้าวโพด; ข้าวฟ่าง; การใช้น้ำ; พันธุ์โบกอร์ 2; พันธุ์เฮกการี่ 13.
Ano: 1975 URL: http://anchan.lib.ku.ac.th/agnet/handle/001/3840
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El agua como elemento de percepción ambiental de los usuarios en San Nicolás Tlamincas, municipio de Texcoco. Colegio de Postgraduados
Durán Barrios, Juana María Antonia.
La localidad donde se realizó la investigación se ubica en la región XIII Aguas del Valle de México, donde la disponibilidad media de agua per cápita es de 143 m3 habitante-1 año-1, la más baja a nivel nacional, situación que orilló a indagar, cuál de los siguientes factores presentan fugas en el cuidado y la conservación de agua: a) en la percepción que tienen los usuarios de la cantidad; b) en el volumen de suministro en la toma domiciliaria; c) en otros problemas no detectados. La percepción de los usuarios sobre la cantidad de agua se obtuvo por encuesta y se diferenció por ejidatarios y no ejidatarios, en la ubicación de las tomas domiciliarias y fuentes de abastecimiento de la infraestructura hidráulica se utilizó Sistemas de Información Geográfica,...
Palavras-chave: Usuarios de agua potable; Percepción de la cantidad de agua; Suministro de agua; Users of drinking water; Perception of water amount; Water supply; Desarrollo Rural; Doctorado.
Ano: 2011 URL: http://hdl.handle.net/10521/617
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Empowering Brazilian Northeast rural communities to desalinated drinking water access: Programa Água Doce. Repositório Alice
FERREIRA, R. S.; VEIGA, H. P.; SANTOS, R. G. B. dos; SAIA, A.; RODRIGUES, S. C.; BEZERRA, A. F. M.; HERMES, L. C.; MOURA, A.; CUNHA, L. H..
Abstract: The Programa Água Doce-PAD(in English: Fresh Water Program) promoted by the Brazilian Federal Government under the coordinationof the Environmental Ministry, seeks to promote sustainable use of groundwater resources and provide potable water for human consumption in areas withcriticalwater scarcity in the Brazilian Semiarid region, through the use of the Reverse Osmosis Technique. The Program is guided by the following principles: community empowerment, environmental sustainability and technicalcapacity building. The methodology that led the Program to becomea success case was conceived in 2003, through a participatory process with the contribution of public Brazilian institutions such as: Federal University of Campina Grande-UFCG (Social...
Tipo: Separatas Palavras-chave: Abastecimento de água; Água salobra; Dessalinização; Comunidade rural; Brackish water; Desalination; Water supply; Rural communities; Issues and policy.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1085693
Registros recuperados: 58
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