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Registros recuperados: 7
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Charging for irrigation water: The issues and options, with a case study from Iran AgEcon
Perry, Christopher J..
Inadequate funding for maintenance of irrigation works and emerging shortages of water are prevalent. The use of water charges to generate resources for maintenance and to reduce demand is widely advocated. Examples from other utilities, and from the domestic/industrial sectors of water supply suggest the approach could be effective. In developing countries, the facilities required for measured and controlled delivery of irrigation are rarely in place, and would require a massive investment in physical, legal and administrative infrastructure. To be effective in curtailing demand, the marginal price of water must be significant. The price levels required to cover operation and maintenance (O&M) costs are too low to have a substantial impact on demand,...
Tipo: Report Palavras-chave: Irrigation management; Productivity; Water allocation; Water use efficiency; Operations; Maintenance; Cost recovery; User charges; Water rates; Pricing; River basins; Water shortage; Economic aspects; Salinity; Case studies; Agribusiness; Agricultural Finance; Community/Rural/Urban Development; Crop Production/Industries; Environmental Economics and Policy; Farm Management; Financial Economics; Land Economics/Use; Production Economics; Productivity Analysis; Public Economics.
Ano: 2001 URL: http://purl.umn.edu/44567
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Effect of water availability on physiological performance and lettuce crop yield (Lactuca sativa) Ciencia e Investigación Agraria
Molina-Montenegro,Marco A; Zurita-Silva,Andrés; Oses,Rómulo.
Water is essential for plants, affecting the majority of the physiological processes related to growth and productivity. Water shortage is one of the most common factors that limit crop productivity worldwide. Many cultivars have elevated water requirements, nevertheless in some countries due to global climate change effects, the availability of water for irrigation is becoming limited. In fact, current models of climate changes predict that central Chile will be a sensitive zone where precipitation will drastically decrease. In this study, the variation of gas exchange and production of fresh biomass in a lettuce cultivar, grown under different water availability regimes, was evaluated. Additionally, the concentration of total soluble sugar and water use...
Tipo: Journal article Palavras-chave: Soluble sugars; Water use efficiency; Water shortage; Lettuce; Photosynthetic rate.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000100006
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Jute Retting Process: Present Practice and Problems in Bangladesh CIGR Journal
Ali, Md. Rostom; Kozan, Osamu; Rahman, Anisur; Islam, Khandakar Tawfiq; Hossain, Md. Iqbal.
Jute retting process is one of the important responsible factors for quality of jute fiber. Scarcity of jute retting water in some areas of Bangladesh is one of the major issues. The main purpose of this study was provided information about the status of present jute retting process as well as mentioned the advantages and disadvantages of different jute retting processes. Data about traditional jute retting process and ribbon retting process were collected through personal interview from the jute growers. The farmers are involved in jute cultivation and majority of them use the traditional method and time consuming approach of retting in ponds/canals. The traditional method hampers the quality of the jute fiber, fish cultivation and pollutes the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Post-harvest; Jute retting; Environment Jute retting; Water shortage; Environment; Ribbon retting; And Quality fiber.
Ano: 2015 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3212
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National Conference on Irrigation for Food Security Voluume 1; Proceedings on Water, Food Security and Climate Change in Sri Lanka, EMICH, Colombo, June 9-11, 2009 AgEcon
Tipo: Presentation Palavras-chave: Food security; Climate change; River basins; Water shortage; Irrigated farming; Water quality; Tanks; Aquatic plants; Rice; Food insecurity; Water resource management; Zero tillage; Weed control; Agroforestry; Canals; Surface runoff; Remote sensing; Agricultural and Food Policy; Environmental Economics and Policy; Food Consumption/Nutrition/Food Safety; Food Security and Poverty; Livestock Production/Industries; Resource /Energy Economics and Policy.
Ano: 2010 URL: http://purl.umn.edu/118419
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Policies drain the North China Plain: Agricultural policy and groundwater depletion in Luancheng County, 1949-2000 AgEcon
Kendy, Eloise; Molden, David J.; Steenhuis, Tammo S.; Liu, Changming; Wang, Jinxia.
The report examines the relationships between agricultural policies in the North China Plain, the approaches to water management that evolved from them, the quantity of water that was actually used, and the consequent groundwater depletion beneath Luancheng County, Hebei Province, from 1949 to 2000. To systematically address these relationships, we use a comprehensive water-balance approach. Our results indicate that a single, longstanding policy-that of using groundwater to meet the crop-water requirements not supplied by precipitation-is responsible for the steady rate of groundwater decline.
Tipo: Report Palavras-chave: Agricultural production; Groundwater; Aquifers; Water shortage; Irrigation efficiency; Agricultural policy; Crop production; Wastewaters; Water management; Hydrology; Economic development; Crop yield; Cotton; Wheat; Sprinkler irrigation; Water conservation; Water use efficiency; Pumping; Water balance; Vegetables; Rural economy; Irrigated framing; Community/Rural/Urban Development; Crop Production/Industries; Environmental Economics and Policy.
Ano: 2003 URL: http://purl.umn.edu/44560
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The global groundwater situation: overview of opportunities and challenges AgEcon
Shah, Tushaar; Molden, David J.; Sakthivadivel, Ramasamy; Seckler, David.
Groundwater offers us few but precious opportunities for alleviating the misery of the poor; but it poses many—and daunting—challenges of preserving the resource itself. A big part of the answer is massive initiatives to augment groundwater recharge in regions suffering depletion; but, in the ultimate analysis, these cannot work without appropriate demand-side interventions. The water vision of a world that future generations will inherit will have to be the one in which groundwater plays its full developmental, productive and environmental role but in a sustainable manner; and the framework of action to realize this vision will mean eschewing the current free-for-all in groundwater appropriation and use, and promoting a more responsible management of this...
Tipo: Book Palavras-chave: Groundwater resources; Groundwater depletion; Water scarcity; Water shortage; Poverty; Rural development; River basins; Sustainability; Waterlogging; Salinity; Aquifers; Water pollution; Pumps; Recharge; Water harvesting; Community/Rural/Urban Development; Environmental Economics and Policy; Food Security and Poverty.
Ano: 2000 URL: http://purl.umn.edu/113506
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World water demand and supply, 1990 to 2025: scenarios and issues AgEcon
Seckler, David; Amarasinghe, Upali A.; Molden, David J.; de Silva, Radhika; Barker, Randolph.
Presents two alternative scenarios of water demand and supply for 118 countries over the 1990 to 2025 period and develops indicators of water scarcity for each country and for the world as a whole. This study is the first step in IWMI's long-term research goal: to determine the extent and depth of water scarcity, its consequences for individual countries and what can be done about it.
Tipo: Report Palavras-chave: Irrigation management; Water balance; River basins; Basin irrigation; Water use efficiency; Water supply; Water requirements; Domestic water; Water scarcity; Water demand; Water shortage; Irrigated farming; Productivity; Food security; Recycling; Rice; Agribusiness; Agricultural and Food Policy; Community/Rural/Urban Development; Crop Production/Industries; Farm Management; Food Consumption/Nutrition/Food Safety; Food Security and Poverty.
Ano: 1998 URL: http://purl.umn.edu/61108
Registros recuperados: 7
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