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Issuescouverture du solLandLibrary Resource
There are 2, 240 content items of different types and languages related to couverture du sol on the Land Portal.

couverture du sol

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Impacts of conservation buffers and grasslands on total phosphorus loads using hydrological modeling and remote sensing techniques

Journal Articles & Books
Décembre, 2011

To better assess the impacts of conservation buffers and grasslands on water quality at large spatial scales, development and integration of novel approaches are crucial to ensure that these land management practices are functioning properly and meeting their original goals. Recent developments in remote sensing technology have greatly enriched the availability of geospatial data that can be used in hydrological modeling to assess the potential hydrological response of conservation practices over larger areas.

Performance of the Endemic Alpine Herb Primula scandinavica in a Changing European Mountain Landscape

Journal Articles & Books
Décembre, 2015
Norvège

This paper reports on the performance of the red-listed Primula scandinavica, endemic to Scandinavia. The study took place in Jotunheimen, Norway. We evaluated occurrence, density and sexual reproduction variables (number of fertile individuals and number of seed capsules). Habitats were registered as land-cover categories (historical and current; broad habitat types) and habitat patch classes (semi-natural and natural; fine-grained habitat types).

Land-use/land-cover dynamics in Chiang Mai: Appraisal from remote sensing, GIS and modelling approaches

Policy Papers & Briefs
Août, 2006
Thaïlande

Remotely-sensed images and Geographical Information Systems (GIS) data were integrated into the SLEUTH cellular automata (CA) model to analyze land-use/land-cover dynamics in Chiang Mai city and its surrounds. The land-use and land-cover statistics, obtained from GIS data base and satellite images from 1952, 1977, 1989 and 2000 revealed rapid increased in urbanization during these periods. To understand the underlying causes of land-use and land-cover dynamics, remote sensing, GIS and modeling techniques were applied.

Quantifying Outdoor Water Consumption of Urban Land Use/Land Cover: Sensitivity to Drought

Journal Articles & Books
Décembre, 2014

Outdoor water use is a key component in arid city water systems for achieving sustainable water use and ensuring water security. Using evapotranspiration (ET) calculations as a proxy for outdoor water consumption, the objectives of this research are to quantify outdoor water consumption of different land use and land cover types, and compare the spatio-temporal variation in water consumption between drought and wet years.

Addressing global change challenges for Central Asian socio-ecosystems

Journal Articles & Books
Décembre, 2012
Kirghizistan
Kazakhstan
Tadjikistan
Turkménistan
Ouzbékistan
Asie

Central Asia is one of the most vulnerable regions on the planet earth to global climate change, depending on very fragile natural resources. The Soviet legacy has left the five countries (Kazakhstan, Tajikistan, Kyrgyzstan, Turkmenistan, and Uzbekistan) with a highly integrated system but they are facing great challenges with tensions that hinder regional coordination of food and water resources.

Committed carbon emissions, deforestation, and community land conversion from oil palm plantation expansion in West Kalimantan, Indonesia

Journal Articles & Books
Décembre, 2012
Indonésie

Industrial agricultural plantations are a rapidly increasing yet largely unmeasured source of tropical land cover change. Here, we evaluate impacts of oil palm plantation development on land cover, carbon flux, and agrarian community lands in West Kalimantan, Indonesian Borneo. With a spatially explicit land change/carbon bookkeeping model, parameterized using high-resolution satellite time series and informed by socioeconomic surveys, we assess previous and project future plantation expansion under five scenarios.

Comparing spatiotemporal patterns in Eurasian FPAR derived from two NDVI-based methods

Journal Articles & Books
Décembre, 2012

A long-term, consistent Fraction of Absorbed Photosynthetically Active Radiation (FPAR) product is necessary to study the spatial and temporal patterns of vegetation dynamics associated with climatic changes and human activities. In this study, Eurasia was selected as the study area.

Assessing the Utility of Satellite Imagery with Differing Spatial Resolutions for Deriving Proxy Measures of Slum Presence in Accra, Ghana

Journal Articles & Books
Décembre, 2012
Ghana

Little research has been conducted on how differing spatial resolutions or classification techniques affect image-driven identification and categorization of slum neighborhoods in developing nations. This study assesses the correlation between satellite-derived land cover and census-derived socioeconomic variables in Accra, Ghana to determine whether the relationship between these variables is altered with a change in spatial resolution or scale.

Effects of conservation policies on forest cover change in giant panda habitat regions, China

Journal Articles & Books
Décembre, 2013
Chine

After long periods of deforestation, forest transition has occurred globally, but the causes of forest transition in different countries are highly variable. Conservation policies may play important roles in facilitating forest transition around the world, including China. To restore forests and protect the remaining natural forests, the Chinese government initiated two nationwide conservation policies in the late 1990s – the Natural Forest Conservation Program (NFCP) and the Grain-To-Green Program (GTGP).

Study on the diurnal change of microclimate and human comfort in five types of land covers

Journal Articles & Books
Décembre, 2013

The role of urban parks in the microclimatic conditions of cities in summer is investigated in this paper through monitoring campaigns carried out at the Beijing Olympic forestry park. Five kinds of land cover, namely urban woods, lawn, bare concrete cover, water areas and wetlands were selected to study on the temperature, humidity and human comfort. The air temperature and relative humidity were measured once every two hours from 8:00 to 20:00 every day and continuously three days in July 2010.

Fire emissions estimates in Siberia: evaluation of uncertainties in area burned, land cover, and fuel consumption

Journal Articles & Books
Décembre, 2012
Fédération de Russie

Boreal forests constitute the world's largest terrestrial carbon pools. The main natural disturbance in these forests is wildfire, which modifies the carbon budget and atmosphere, directly and indirectly. Wildfire emissions in Russia contribute substantially to the global carbon cycle and have potentially important feedbacks to changing climate. Published estimates of carbon emissions from fires in Russian boreal forests vary greatly depending on the methods and data sets used. We examined various fire and vegetation products used to estimate wildfire emissions for Siberia.