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IssuesDegradación de tierrasLandLibrary Resource
There are 2, 371 content items of different types and languages related to Degradación de tierras on the Land Portal.
Displaying 625 - 636 of 1117

Fifty Years on: Long‐term Patterns of Land Sensitivity to Desertification in Italy

Journal Articles & Books
Diciembre, 2016
Italia

The Mediterranean region has been regarded as a critical hotspot for desertification due to the impact of soil degradation, the land‐use changes and the climate variations. Few large‐scale studies have been devoted to analyse trends in land sensitivity to desertification in the northern Mediterranean basin. The present paper contributes to this deserving issue by quantifying the level of land sensitivity to desertification in Italy at seven points between 1960 and 2010 at a fine spatial scale.

Sediment in Alluvial and Lacustrine Debris Fans as an Indicator for Land Degradation Around Lake Ashenge (Ethiopia)

Journal Articles & Books
Diciembre, 2016
Etiopía

Sediments deposited by (paleo) flash floods can hold valuable information on processes of environmental change, land degradation or desertification. In order to assess the suitability of flash flood deposits as proxies for land degradation, we monitored a representative gully segment in North Ethiopia (Ashenge catchment), investigated a sequence of alluvial debris fans downstream of this segment and dated a neighbouring subaquatic debris fan using short‐lived ²¹⁰Pb isotope counting.

Numerical research of extreme wind-induced dust transport in a semi-arid human-impacted region of Mexico

Journal Articles & Books
Diciembre, 2011
México

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.

Valuing soil conservation practices using contingent valuation technique: evidence from the central rift valley of Ethiopia

Journal Articles & Books
Diciembre, 2015
Etiopía

Land degradation mainly in the form of soil and nutrient depletion is the prominent problem that the Ethiopian agriculture is facing. Due to this, farmers should be aware of this problem and the necessity of implementing conservation measures. Hence, this study assesses farm households’ willingness to participate in soil conservation practice through a Contingent Valuation method in one of the most degraded parts of the country.

Oil content and lipid composition of safflower (Carthamus tinctorius) irrigated with saline water under greenhouse and field conditions

Journal Articles & Books
Diciembre, 2011
Uzbekistán

An intensive process of land deterioration of some regions in Uzbekistan including the Aral Sea basin has led to a significant increase in soil salinity levels and consequently to a considerable reduction of total fertile soil area, as these lands are of little use for plant growth. The area is estimated to be more than 1.4 million ha of seabed. As a result, there was an immediate need to cultivate new crops capable of stopping the movement of sands and the enlargement of saline soils.

National approaches to evaluation of the degree of soil degradation

Journal Articles & Books
Diciembre, 2015

Approaches to evaluation of the degree of soil degradation and the related normative documents applied by specialists from state institutes for land management of the former Soviet Union in the course of largeand medium-scale soil surveys in the 1960s–1990s are analyzed. It is shown that the types and rates of soil degradation were specified without proper consideration for the taxonomic position of particular soils.

Regulatory and legislative aspects of the ecological evaluation and control of soil degradation in Russia on the basis of the assessment of soil ecological functions

Journal Articles & Books
Diciembre, 2015
Rusia

On the basis of legislative norms concerning land and nature management in Russia and scientific concepts of soil and land, new definitions of these basic concepts are suggested. Soils and lands are considered as separate components of the environment, each performing their own ecological functions. The definitions for land degradation and soil degradation are given.

Multidisciplinary study of Holocene archaeological soils in an upland Mediterranean site: Natural versus anthropogenic environmental changes at Cecita Lake, Calabria, Italy

Journal Articles & Books
Diciembre, 2013
Italia

This paper highlights results of a multidisciplinary and multi-analytical study of Holocene archaeological soils around Cecita Lake (Sila massif, Calabria, southern Italy), which represents a typical upland Mediterranean environment. It is focused on assessment of climatic and environmental changes that took place since late Neolithic to Roman times, trying to discriminate natural from anthropogenic signals.

Land Degradation Analysis on Coastal Area of Ampara District

Journal Articles & Books
Octubre, 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.

Potential of multispectral and hyperspectral data to detect saline-exposed soils in Brazil

Journal Articles & Books
Diciembre, 2015
Brasil

Irrigation-induced soil salinization is an important land degradation process in northeastern Brazil. We used multispectral and hyperspectral sensors to detect saline-exposed soils in an area cultivated with irrigated rice. Spectral mixture analysis (SMA) was applied to Operational Land Imager (OLI)/Landsat-8 data to identify exposed soils. By measuring the electrical conductivity (EC) of soil samples from 53 sites, we classified them into saline and non-saline.

Scale-dependent effects of grazing on rangeland degradation in northern Kenya: a test of equilibrium and non-equilibrium hypotheses

Journal Articles & Books
Diciembre, 2003
Kenya

This study employs scale-dependence as an analytical approach to understanding effects of livestock grazing on rangeland degradation in northern Kenya. It used extensive datasets previously collected from 13 200 km2 rangelands where grazing pressure gradients of livestock (varied from none, light, moderate, heavy and very heavy grazing) in conjunction with seasonality across different ecological scales influenced plant responses and probably contributed to land degradation.