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Displaying 1156 - 1160 of 1605Numerical research of extreme wind-induced dust transport in a semi-arid human-impacted region of Mexico
A numerical research is carried out to investigate the regional impact of extreme wind-induced dust transport in the central-northern part of Mexico. In boreal winter, strong wind soil erosion processes occur in the arid zones of the Mexican highlands, as a consequence of land use change and land cover change. The effect of land use change and land cover change has consequences in the atmospheric circulation, by altering the balance in solar radiation, albedo, soil moisture and texture, aerodynamic roughness and other surface properties.
Land distribution and acquisition practices in Ghana's cocoa frontier: The impact of a state-regulated marketing system
Substantial differences in the size of landholdings among cocoa farmers in the Western Region – the last cocoa “frontier” in Ghana – are primarily a result of inheritance practices and the purchase of vast tracts of land by migrants in the initial period of the cocoa boom. Individual accumulation of land over the last decade has mainly taken place via inheritance (among indigenous farmers) without takeovers of land and dispossession of small-scale farmers outside the extended family. Land accumulation among migrant farmers is rare beyond the initial acquisition.
When should households be compensated for land-use restrictions? A decision-making framework for Chinese forest policy
Competing uses of land mean that regulations aimed at environmental conservation often conflict with the land-use rights of rural households. Several reports suggest that this has occurred with the introduction of the Natural Forest Protection Programme (NFPP) in China, one of the world's largest logging ban programmes. This paper investigates whether households should be compensated for infringements on property rights, drawing on institutional economics literature on regulation.
How and why forest managers adapt to socio-economic changes: A case study analysis in Swiss forest enterprises
Forestry is an important source of income for forest owners and those employed in rural areas. In recent years, this sector has had to tackle far-reaching changes taking place in the social, economic and political system. New demands are now being addressed and policies reformulated. As a response to this pressure, new decision-making structures and innovation activities are taking place in the forestry sector. The aim of this paper is to study learning processes on the management level of forest enterprises.
cloud mask methodology for high resolution remote sensing data combining information from high and medium resolution optical sensors
This study presents a novel cloud masking approach for high resolution remote sensing images in the context of land cover mapping. As an advantage to traditional methods, the approach does not rely on thermal bands and it is applicable to images from most high resolution earth observation remote sensing sensors. The methodology couples pixel-based seed identification and object-based region growing. The seed identification stage relies on pixel value comparison between high resolution images and cloud free composites at lower spatial resolution from almost simultaneously acquired dates.