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Issueszone urbaineLandLibrary Resource
Displaying 1417 - 1428 of 1963

Feasibility and competitiveness of intensive smallholder dairy farming in Brazil in comparison with soya and sugarcane: Case study of the Balde Cheio Programme

Journal Articles & Books
Décembre, 2013
Brésil

Technology introduction and the intensive use of resources, particularly in smallholder farming systems, are at the core of debates about future food security and sustainable livelihoods. In Brazil, land use changes promoted by competing agricultural chains require a search for alternative modes of production for family farms. We analyse the technical and economic viability of intensification of dairy farming by smallholders in the “Balde Cheio” (Full Bucket) programme.

The typology of property formation in course of land reform in Estonia

Conference Papers & Reports
Décembre, 2014
Estonie
Lettonie

The implementation of land reform has influenced the formation of property structure. The main procedures of land reform activities are stated in Estonian legislation. However, the provisions for determining the area and the boundaries for properties to be formed in the course of land reform are stated in legal acts in an unsystematic way. The aim of this study is to systematize the parcel area and the boundaries determination procedures that are used in the course of land reform for property formation.

Conservation-priority grassland bird response to urban landcover and habitat fragmentation

Journal Articles & Books
Décembre, 2016

As urbanization in the landscape increases, some urban centers are setting aside habitat for wildlife. This habitat may be particularly valuable to declining or conservation-priority species. One group in particular need of conservation actions that may benefit from habitat located in urban areas is grassland birds. Declines of grassland bird species have been particularly severe in the Midwestern U.S., where most grassland cover has been lost, fragmented, and surrounded by unsuitable habitat.

Improving classification accuracy of airborne LiDAR intensity data by geometric calibration and radiometric correction

Journal Articles & Books
Décembre, 2012

Airborne light detection and ranging (LiDAR) systems are used to measure the range (distance from the sensor to the target) and the intensity data (the backscattered energy from the target). LiDAR has been used extensively to model the topography of the Earth surface. Nowadays, LiDAR systems operating in the near-infrared spectral range are also gaining high interest for land cover classification and object recognition. LiDAR system requires geometric calibration (GC) and radiometric correction (RC) in order to maximize the benefit from the collected LiDAR data.

Contrasting influences of stormflow and baseflow pathways on nitrogen and phosphorus export from an urban watershed

Journal Articles & Books
Décembre, 2014
États-Unis d'Amérique

Eutrophication of urban surface waters from excess nitrogen (N) and phosphorus (P) inputs remains a major issue in water quality management. Although much research has focused on understanding loading of nutrients from storm events, there has been little research to understand the contribution of baseflow, the water moving through storm drains between rainfall events. We investigated the relative contributions of baseflow versus stormflow for loading of water and nutrients (various forms of N and P) by the storm drain network in six urban sub-watersheds in St. Paul, MN, USA.

Does Forest Expansion Mitigate the Risk of Desertification? Exploring Soil Degradation and Land-Use Changes in a Mediterranean Country

Journal Articles & Books
Décembre, 2014
Italie

SUMMARY The present study evaluates the vulnerability to soil degradation of four land-use classes (urban areas, cropland, forests and non-forest natural land) during 1960–2010 using the Environmental Sensitive Area Index (ESAI) to verify if forests mitigate the increase of desertification risk in Italy. Results indicate that forests was the class with the lowest level of vulnerability during the whole investigated period and with the growth rate (1960–2010) in the ESAI always below the one observed on a landscape scale.

urban forest-inventory-and-analysis investigation in Oregon and Washington

Journal Articles & Books
Décembre, 2016

The U.S. Department of Agriculture (USDA) Forest Service, Forest Inventory and Analysis program recently inventoried trees on 257 sample plots in the urbanized areas of Oregon and Washington. Plots were located on the standard grid (≈1 plot/2428ha) and installed with the 4-subplot footprint (≈.067ha with 4 circular subplots).

Analyzing wildfire exposure and source–sink relationships on a fire prone forest landscape

Journal Articles & Books
Décembre, 2012
États-Unis d'Amérique

We used simulation modeling to analyze wildfire exposure to social and ecological values on a 0.6millionha national forest in central Oregon, USA. We simulated 50,000 wildfires that replicated recent fire events in the area and generated detailed maps of burn probability (BP) and fire intensity distributions. We also recorded the ignition locations and size of each simulated fire and used these outputs to construct a fire source–sink ratio as the ratio of fire size to burn probability.

To ranch or not to ranch: home on the urban range?

Journal Articles & Books
Décembre, 2000

California ranchers in urban Alameda and Contra Costa Counties, and in rural Tehama County, were surveyed to examine effects of increasing development, land use change, and attrition of the ranching community on their commitment to ranching, and to assess land conservation program acceptability. Questions were about practices, reasons for ranching, and what influences ranching's future. Ranchers share much in common. Most enjoy ranching, "feeling close to the earth," living in a "good place for family life," and the camaraderie in the ranching community.

integration of plant phenology and land use data to create a GIS-assisted bioclimatic characterisation of Bavaria, Germany

Journal Articles & Books
Décembre, 2011
Allemagne

Background: Since phenology is a good bio-indicator of temperature the latter is often used in phenological analyses. However, whilst meteorological data are difficult to interpolate from point measurements at the desired resolution, region-wide digital data, e.g.

Trade-offs between maintenance of ecosystem services and socio-economic development in rural mountainous communities in southern Spain: A dynamic simulation approach

Journal Articles & Books
Décembre, 2013
Espagne

Mountainous rural communities have traditionally managed their land extensively, resulting in land uses that provide important ecosystem services for both rural and urban areas. Over recent decades, these communities have undergone drastic changes in economic structure, population size and land use. Our understanding of the exact mechanisms that drive these changes is limited, and there is also a lack of integrative approaches to enable decision makers to steer rural development towards a more sustainable path.