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Mostrando ítems 1 a 9 de 359.
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Library Resource
Artículos de revistas y libros
Australia, China, África, Asia
Land degradation is always with us but its causes, extent and severity are contested. We define land degradation as a long-term decline in ecosystem function and productivity, which may be assessed using long-term, remotely sensed normalized difference vegetation index (NDVI) data. Deviation from the norm may serve as a proxy assessment of land degradation and improvement - if other factors that may be responsible are taken into account. These other factors include rainfall effects which may be assessed by rain-use efficiency, calculated from NDVI and rainfall.
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Artículos de revistas y libros
Australia, Brasil, Canadá, Estados Unidos de América, India, Rusia, China
Groundwater vulnerability assessment is an important task in water resources and land management. The most sophisticated among the vulnerability assessment techniques is the GIS-based DRASTIC model. However, despite its popularity, it is marred with excessive subjectivity glitches; little research has been conducted to address the shortcomings associated with this method. This study investigates various issues regarding the application of the GIS-based DRASTIC model through a critical review of relevant literatures.
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Documentos de conferencias e informes
Estados Unidos de América, Filipinas, Malasia, China, Indonesia, Australia, Canadá, Tailandia, Nueva Zelandia
The emerging biofuel sector has drawn great interest as an alternative source of fuel for transportation. The expansion of biofuels greatly impacts world agricultural markets, since currently, the primary feedstocks for ethanol and biodiesel production are field crops and their derived products. There is great interest in the potential of countries to expand their biofuel sectors through increased production of feedstocks. The long-term potential for developing first-generation biofuels in many countries depends on a large and constant supply of feedstocks.
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Library Resource
Artículos de revistas y libros
China, España, India, Brasil, Nueva Zelandia
Data from the 1990-1994 period presented in the "Brazil's Initial National Communication" document indicated that the country is one of the top world greenhouse gas (GHG) emitters. A large majority of Brazil's GHG emissions come from deforestation mainly of the Amazon biome for agriculture and livestock land uses. This unique inventory is now out of date.
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Library Resource
Artículos de revistas y libros
China, España, India, Brasil, Nueva Zelandia
Data from the 1990-1994 period presented in the "Brazil's Initial National Communication" document indicated that the country is one of the top world greenhouse gas (GHG) emitters. A large majority of Brazil's GHG emissions come from deforestation mainly of the Amazon biome for agriculture and livestock land uses. This unique inventory is now out of date.
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Library Resource
Informes e investigaciones
Previously in China, all land was controlled by the communes. Over the past twenty years, with the break up of the communes, new land tenure arrangements have given greater control over land to individual households. This essay argues that recent transfers in land tenure between households have caused women to lose rights and decision making power over land, as well as possibilities to benefit from land. Men's migration to cities has caused a 'feminisation' of agriculture which fuels a market for tenure transfer.
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Documentos de conferencias e informes
Nepal, Indonesia, Filipinas, Sri Lanka, China, Viet Nam, Australia, Japón
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Artículos de revistas y libros
Jordania, Sudáfrica, México, Túnez, Tanzania, Irán, India, China, Estados Unidos de América, Australia
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Artículos de revistas y libros
Jordania, Sudáfrica, México, Túnez, Tanzania, Irán, India, China, Estados Unidos de América, Australia
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Library Resource
Documentos de política y resúmenes
India, China, Sri Lanka, Australia
The problems that river basin institutions in the developed world successfully address?such as pollution, sediment buildup in rivers and the degradation of wetlands?are not the top priorities for Indian policy makers and people. The items that do top Indian agendas?providing access to water for drinking and growing food, eradicating poverty, and stopping groundwater overexploitation?are either unresolved in the developed world or have become irrelevant due to economic development.
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