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Issuesdegradação de terrasLandLibrary Resource
There are 2, 371 content items of different types and languages related to degradação de terras on the Land Portal.
Displaying 565 - 576 of 1112

Grazing as a post-mining land use: A conceptual model of the risk factors

Journal Articles & Books
Dezembro, 2012
Austrália

Driven principally by government regulation and societal expectations, mining companies around the world are seeking to mitigate the environmental impacts of mining through mined land rehabilitation programs. The ultimate goal of rehabilitation is to establish an acceptable and sustainable post-mining land use. Mining companies worldwide face the challenge of specifying just what a sustainable post-mining land use will be.

Water Resources and Soil Management In Italy

Journal Articles & Books
Dezembro, 2016
Itália

Italy has always had a long dramatic history of extreme events such as landslides, flooding, land degradation and drought. Much has been done in terms of prevention and monitoring but still there is much left to do, in particular introducing innovative alert systems based on the integration of real‐time weather forecasting with national alert and protection systems.

Reconstruction of Holocene environmental changes in two archaeological sites of Calabria (Southern Italy) using an integrated pedological and anthracological approach

Journal Articles & Books
Dezembro, 2013
Itália

This paper focuses on the reconstruction of Holocene climatic and environmental changes in two archaeological sites of southwestern and north-central Calabria (southern Italy). It is based on a comparison of geoarchaeological, pedological and pedoanthracological data from soil profiles in the coastal hilly and inland mountainous surroundings of Palmi and Cecita Lake, respectively. At the Palmi site, the representative soil profile includes settlements and artefacts ranging from late Neolithic to late early Bronze Age and undifferentiated historical epochs.

Lignin signature as a function of land abandonment and erosion in dry luvisols of SE Spain

Journal Articles & Books
Dezembro, 2012

This study addressed long-term land degradation and regeneration effects on soil organic carbon (SOC) composition. This was done in a context of secondary succession following land abandonment in the Mediterranean region of SE Spain. The effects of land use change and soil erosion on SOC composition were studied by using lignin as a biomarker. To get insight into the evolution of SOC composition along a land use and topographical gradient, differences in lignin contribution to SOC were determined at different soil depths (0–0.1m, 0.1–0.2m, 0.2–0.3m).

Shieling Areas: Historical Grazing Pressures and Landscape Responses in Northern Iceland

Journal Articles & Books
Dezembro, 2012
Islândia

Historical domestic livestock grazing in sensitive landscapes has commonly been regarded as a major cause of land degradation in Iceland. Shieling areas, where milking livestock were taken to pasture for the summer, represented one element of grazing management and in this paper we consider the extent to which historical shieling-based grazing pressure contributed to land degradation.

framework for national assessment of land degradation in the drylands: a case study of somalia

Journal Articles & Books
Dezembro, 2014
Somália

Land degradation is a gradual, negative environmental process that is accelerated by human activities. Its gradual nature allows degradation to proceed unnoticed, thus reducing the likelihood of appropriate and timely control action. Presently, there are few practical frameworks to help countries design national strategies and policies for its control. The study presented here developed a framework for the national assessment of land degradation. This framework is envisaged to support governments in formulating policies on land degradation.

Land Degradation Analysis on Coastal Area of Ampara District

Journal Articles & Books
Outubro, 2013
Sri Lanka

The island of Sri Lanka is free from serious natural hazards such as volcanic activity and earthquakes resulting from climatic extremes, but there are impacts of many natural disasters, such as landslides, floods and droughts, the intensity and frequency of which are increasing due to human interventions. Some areas of Sri Lanka are also periodically subject to cyclones that occur due to climatic conditions and geographical locations.Land degradation denotes all natural or anthropogenic processes that diminish or impair productivity of land.

Integration of legume trees in maize-based cropping systems improves rain use efficiency and yield stability under rain-fed agriculture

Journal Articles & Books
Dezembro, 2011
Zâmbia
Nigéria
África

Water availability is a major constraint to crop production in sub-Saharan Africa (SSA) where agriculture is predominantly rain-fed. This study aimed to investigate the effect of the nitrogen-fixing legume tree Leucaena (Leucaena leucocephala) and inorganic fertilizer on rain use efficiency (RUE), a robust measure of productivity and land degradation, in three long-term (11–12 years) experiments conducted in Zambia and Nigeria.

Impacts of innovative forestry land use on rural livelihood in a bimodal agricultural system in irrigated drylands

Journal Articles & Books
Dezembro, 2013
Ásia Central

The conversion of marginal croplands to tree plantations, as an option to address climate change, land degradation, and irrigation water scarcity, as well as to improve the welfare of local population requires prior analysis.

Land use changes and its impacts on water resources in Nile Delta region using remote sensing techniques

Journal Articles & Books
Dezembro, 2013

Sustainable water resources management plans depend on reliable monitoring of land use –land cover (LULC) changes. The use of the remote sensing techniques in LULC changes detection brings consistency and reliability to the decision maker at regional scale. Three temporal data sets of images were used to obtain the land cover changes in this study: Landsat-5 Thematic Mapper (TM) acquired in 1984, and Landsat-7 enhanced Thematic Mapper acquired in 2000 and 2005 consequently. Each temporal data set consists of four Landsat scenes, which were mosaicked to cover the whole Nile Delta.

Complexity of ecological restoration in China

Journal Articles & Books
Dezembro, 2013
China

Land degradation is a primary issue that affects environmental conservation and socioeconomic development. However, ecological restoration has complex and poorly understood consequences for the structure and composition of future ecosystems and socioeconomic systems. To illustrate the complexity of ecological restoration, we discuss the potential links between China's ongoing large-scale ecological restoration practices and the resulting changes of natural factors such as landscape characteristics, climate, and vegetation communities.

Ecological succession and land use changes in a lake retreat area (Main Ethiopian Rift Valley)

Journal Articles & Books
Dezembro, 2013

In the semi-arid Main Ethiopian Rift Valley, ecological succession is related to continuous lake retreat. Human activity, through its impact on land use and cover, affects this ecological succession at various degrees. Through a remote sensing study, we explored how the drivers for land use and cover changes (LUCC) have changed over the last decades and which impact this has on ecological succession.