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Displaying 1176 - 1180 of 1605Using a sub-pixel mapping model to improve the accuracy of landscape pattern indices
The assessment of landscape spatial patterns is a key issue in landscape management. Landscape pattern indices (LPIs) are tools appropriate for analyzing landscape spatial patterns. LPIs are often derived from raster land cover maps that are extracted from remotely sensed data through hard classification. However, pixel-based hard classification methods suffer from the mixed pixel problem (in which pixels contain more than one land cover class), making for inaccurate classification maps and LPIs.
When collective action and tenure allocations collide: Outcomes from community forests in Quintana Roo, Mexico and Petén, Guatemala
Based on a comparative case study of four community forestry enterprises in Guatemala and Mexico, we examine the relationship between user group characteristics and state allocation of tenure bundles. Using Schlager and Ostrom's four levels of tenure bundles and collective action theory, we illustrate how tenure bundles and collective action costs interact to either promote or create disincentives for conservation and communal economic benefits.
Suitability evaluation of urban construction land based on geo-environmental factors of Hangzhou, China
Suitability evaluation of urban construction land based on geo-environmental factors is the process of determining the fitness of a given tract of land for construction. This process involves a consideration of the geomorphology, geology, engineering geology, geological hazards, and other geological factors and is the basis of urban construction land planning and management.
Using continuous sampling to examine the distribution of traffic related air pollution in proximity to a major road
A study to characterize the distribution of vehicle related air pollution in proximity to a major arterial road was undertaken to inform local land use planning and policy regarding separation distances that could help reduce exposure for new sensitive land use development. Measurements of criteria air contaminants were made at ground level, 10 m, 30 m, and 60 m from curb side, and at 9 m height, 10 m from curb side along a traffic corridor carrying over 34,000 vehicles per day. Pollutant decay with distance or height was not statistically significant for O₃, CO, or SO₂.
Recent developments of biofuels/bioenergy sustainability certification: A global overview
The objective of this paper is to provide a review on the latest developments on the main initiatives and approaches for the sustainability certification for biofuels and/or bioenergy. A large number of national and international initiatives lately experienced rapid development in the view of the biofuels and bioenergy targets announced in the European Union, United States and other countries worldwide.