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Abastecimiento de agua por gravedad para poblaciones rurales dispersas : experiencias con nuevas tecnologias, el caso de Poccontoy y Orcconmarca 全文
Mendelsohn, Robert | Dinar, Ariel | Huang, Jikun | Wang, Jinxia
This paper presents new experiences in the province of Andahuaylas, in the Andes of Peru, in a bid to help solve the problem of water supply in rural scattered areas. The central part of the document consists of a study that describes and analyzes the process by which 5 small areas in a scattered rural steeply sloping side of a mountain managed to acquire a sustainable water supply operated by gravity. The study includes 3 chapters. The first chapter examines the water issues in the communities, what solutions developed by the commoners to stock up on water, what are the drawbacks of the traditional system of their drinking water system. The second chapter describes technical aspects of the project, explaining how the technologies employed were the product of the physical and social environment. The third chapter describes the community participation during and after the project.
显示更多 [+] 显示较少 [-]Local Financing of Water Utilities : Challenges and Opportunities - The Case of Peru | Financiamiento local de empresas de agua : retos y oportunidades - el caso de Perú | Financiamiento local de empresas de agua : retos y oportunidades - el caso de Peru 全文
2010
World Bank
This report identifies opportunities and challenges for local financing of water utilities in Peru and suggests recommendations for removing barriers and creating incentives for scaling-up local financing to local water utilities. It was developed with an understanding that meeting the Millennium Development Goals (MDGs) in water and sanitation in Peru will require scaling up local financing for the sector and that efficiency and effectiveness can be enhanced by greater involvement of local institutional investors and other parties. This joint study exposes many of the barriers to local private financing facing the urban water supply and sewerage (WS&S) sector in Peru. In short, the majority of local water utilities cannot meet credit rating and governance standards required to access private financing. Consequently, loans from financial markets are rare. These findings are probably not specific to Peru. Accordingly, there is great value for central governments to undertake similarly detailed studies to identify the obstacles preventing access to local financing unique to their country's WS&S sector. | Este informe identifica oportunidades y retos para el financiamiento local de las Empresas de Agua (EPS) en Perú y sugiere recomendaciones para eliminar las barreras y crear los incentivos que permitan expandir el financiamiento local a las EPS. Fue desarrollado partiendo de la premisa de que el logro de los Objetivos de Desarrollo del Milenio en Perú, en materia de agua y saneamiento, requerirá la expansión del financiamiento privado al sector; asimismo, que es posible incrementar la eficacia y la eficiencia de las EPS por medio de una mayor participación de inversores institucionales locales y otros actores.
显示更多 [+] 显示较少 [-]Requerimentos de monitoreo del agua subterranea : para manejar la respuesta de los acuiferos y las amenazas a la calidad del agua 全文
Kemper, Karin | Garduno, Hector | Tuinhof. Albert | Foster, Stephen | Nanni, Marcella
Groundwater is an extensive, concealed and inaccessible resource, and (in contrast to surface water) changes in quantity and quality are often very slow processes occurring below large land areas. These changes cannot be determined by simple one-off snapshot surveys alone, and require more elaborate monitoring networks and data interpretation. The primary goal of aquifer management is to control the impacts of groundwater abstraction and contaminant loads, and monitoring aquifer response and quality trends provide key inputs for this goal. The evaluation of groundwater issues and the implementation of management solutions require hydrogeological data that are in part baseline and in part time-variant in character-the collection of the time-variant component is what is usually considered groundwater monitoring. Groundwater monitoring thus comprises the collection, analysis and storage of a range of data on a regular basis according to specific circumstances and objectives.
显示更多 [+] 显示较少 [-]Los bosques y el agua dulce: cuestiones y opciones 全文
2003
Low-cost water-lifting from groundwater sources: a comparison of the EMAS Pump with the Rope Pump | Dispositifs à faible coût d’extraction d’eau souterraine: une comparaison de la Pompe EMAS avec la Pompe à Corde Extracción de agua a bajo costo a partir de fuentes de agua subterránea: una comparación entre la Bomba EMAS y la Bomba de Mecate 地下水源的低成本提水:EMAS泵和Rope泵的比较 Extração de água de baixo custo a partir de fontes de água subterrânea: comparação da Bomba EMAS com a Bomba de Mecate 全文
2017
MacCarthy, Michael F. | Carpenter, Jacob D. | Mihelcic, James R.
In sub-Saharan Africa, low-cost groundwater supply systems offer great opportunities for the current unserved population of >300 million to access drinking water. A comparative study was performed in Uganda of the EMAS Pump (designed by Escuela Móvil Aguas y Saneamiento Básico) with the trade-named Rope Pump, two low-cost manual water-lifting devices appropriate to pumping from shallow groundwater sources. Pumping rates, energy expended, material costs, and construction requirements were analyzed. Focus was on low-cost application for use in shallow groundwater systems at the household level in developing countries, particularly in sub-Saharan Africa. The study site was northern Uganda, with testing performed at several drilled boreholes. Two variants of each pump were tested by a male and female user, pumping from multiple static water-level depths ranging from 5 to 28 m. Results demonstrated the most common version of the EMAS Pump to perform similarly to the comparable version of the Rope Pump in terms of average pumping rate at depth range 5 to 18 m (93–111%), but less so at deeper depths (63–85%). Normalized pumping rates (considering energy expended) accentuated differences between these versions of the EMAS Pump and Rope Pump (47–97%). Cost of materials to construct the EMAS Pump were 21–60% those of the Rope Pump, and EMAS Pump construction requirements were also less. Based on the assessed factors, it is concluded that the EMAS Pump has potential for success in “self-supply” groundwater systems in sub-Saharan Africa and is particularly appropriate to link with low-cost shallow groundwater sources.
显示更多 [+] 显示较少 [-]Criterios y enfoques de la ordenacion de la calidad del agua en los paises en desarrollo.
1991
Niveles productivos y nutricionales de los pequenos productores de la comunidad de Ojo de Agua (Matagalpa) VI region Nicaragua.
1990
Browaldh Carracedo I.
La participacion de los grupos interesados en la gestion del agua subterranea - movilizar y apoyar organizaciones de gestion de acuiferos 全文
Tuinhof, Albert | Foster, Stephen | Dumars, Charles | Nanni, Marcella | Garduno, Hector
The note highlights the importance of stakeholder participation in groundwater management, because groundwater stakeholders are those who have an important interest in the resources of a specified aquifer. This may be because they use groundwater, or because they practice activities that could cause groundwater pollution, or because they are concerned with groundwater resource and environmental management. Since surface water should be managed conjunctively with groundwater, and municipal or industrial wastewater may pose a threat to groundwater quality, stakeholders should also (where appropriate) include municipal, and industrial representatives. Stakeholder participation in groundwater management is essential for the following reasons: management decisions taken unilaterally by the regulatory agency without social consensus, are often impossible to implement; it enables essential management activities to be carried out more effectively and economically through cooperative efforts, and shared burdens; and, it facilitates the integration and coordination of decisions relating to groundwater resources, land use, and waste management. Groundwater management decisions taken with the participation of stakeholders should help to bring: social benefits, because they tend to promote equity among users; economic benefits, because they tend to optimize pumping and reduce energy costs; technical benefits, because they usually lead to better estimates of water abstraction. On the other hand, participatory management of highly-stressed aquifers should help take some, otherwise, unpopular decisions where-at least in the short run-benefits to a number of stakeholder groups are decreased, because they agree to reduce pumping in the longer-term communal interest.
显示更多 [+] 显示较少 [-]La agrobiologia y la gestion de los recursos naturales. Estudio de experiencias con la biomasa y el agua en medio arido.
1994
Morez R.
Efectos cronicos de pesticidas sobre peces de agua dulce y la produccion de pescado en paises en desarrollo: un repaso y bibliografia.
1982
Parker Bruce L.