SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

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

Accounting for water use and productivity

Agrometeorological conditions in western Pará compared to agricultural production variables using principal component analysis.

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

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

Capacity building for participatory irrigation management in Sindh Province of Pakistan.

Memon, Yameen; Talpur, Mustafa; Murray-Rust, Hammond.

China’s water pricing reforms for irrigation: effectiveness and impact

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

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...

Crescimento inicial do meloeiro frente às mudanças climáticas.

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

Developing effective institutions for water resources management: A case study in the Deduru Oya Basin, Sri Lanka

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

Somaratne, Pallewatte G.; Jinapala, Kiribandage; Perera, L.R.; Ariyaratne, Badugodahewa Ranjith; Bandaragoda, Don Jayatissa; Makin, I.W..

Development and evaluation of a regional water poverty index for Benin

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

Dublin Ireland: a city addressing challenging water supply, management, and governance issues

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

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

Economic analysis of water supply cost structure in the Middle Olifants sub-basin of South Africa

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....

Economic Impacts of Reduced Delta Exports Resulting from the Wanger Interim Order for Delta Smelt

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

Sunding, David L.; Ajami, Newsha K.; Hatchett, Steven; Mitchell, David; Zilberman, David.

ECONOMIC VALUATION OF SOME WETLAND OUTPUTS OF MUD LAKE, MINNESOTA-SOUTH DAKOTA

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

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...

Economies of Scale and Technical Efficiency in Community Water Systems

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

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...

Efeitos da disponibilidade hídrica e de potássio na alocação de carbono em plantas de eucalipto marcadas com 13C-CO2.

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

El agua como elemento de percepción ambiental de los usuarios en San Nicolás Tlamincas, municipio de Texcoco.

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

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

Empowering Brazilian Northeast rural communities to desalinated drinking water access: Programa Água Doce.